bluuebunny/crossref_metadata_2025 huggingface dataset:
Alternative ways to resolve criminal law conflicts
Authors: Kilina Irina
Published: December 2023

The monograph examines the issues of development and differentiation of the criminal procedure form. The author solves a number of general and specific issues of alternative resolution of criminal conflicts. The issues of prerequisites and the legal nature of alternative resolution of criminal conflicts are considered; about the essential features, prerequisites, advantages and disadvantages, limits of application and legal guarantees for the completion of procedural activities without clarifying the key issue of criminal law - the question of the guilt of the accused in committing a crime. The author's vision of the optimal differentiation of such components of the institution of exemption from criminal liability and termination of a criminal case (criminal prosecution) as the basis and condition for exemption from criminal liability and the procedural procedure for termination of a criminal case (prosecution) in connection with the release of a person from criminal liability is outlined. The emphasis is placed on the primacy of the material and legal content of the institute - a general basis for exemption from criminal liability on alternative grounds is proposed, which is based on the possibility of evaluating the positive behavior of a person after committing a crime, allowing to assess the identity of the accused and the expediency of bringing him to criminal responsibility. The solution of particular problems related to the termination of a criminal case (prosecution) in connection with active repentance, reconciliation of the parties, compensation for damage, the use of coercive measures of educational influence and the imposition of a court fine as other measures of a criminal nature is proposed. Proposals are formulated for further improvement of an alternative to the traditional approach to resolving criminal law conflicts.
It is intended for researchers, teachers, graduate students and students of law schools and faculties, as well as practicing lawyers and anyone interested in the problems of procedural law.
Regulation of new forms of employment: theory and practice
Authors: Zabelina Ol'ga , Mirzabalaeva Farida , Pashkova Svetlana , Omel'chenko Irina , Sergeeva Mariya , Yudina Mariya
Published: December 2023

The monograph identifies trends in changes in the field of employment and problems associated with the expansion of employment in new forms in Russia and in the world under the influence of modern factors of transformation of the sphere of labor; summarizes international, foreign and domestic approaches to the identification and systematization of new forms of employment; provides a statistical assessment of the scale and features of the development of new forms of employment in the Russian Federation The risks of new forms of employment for employees, employers (and platform owners) and the state are considered; a systematic review of foreign experience in state regulation of new forms of employment is presented and a set of proposals for the development of flexible regulatory regulation of new forms of employment in Russia to achieve a balance of interests of the state, business and employees is substantiated.
It is addressed to researchers, university teachers, graduate students and students studying the labor market and the sphere of social and labor relations, as well as representatives of legislative and executive authorities, state employment service bodies, trade unions and public organizations.
Civil law support for smart contracts
Authors: Kirillova Elena , Zul'fugarzade Teymur
Published: December 2023

The monograph examines the legal regulation of smart contracts; features of legal support for smart contracts; problems of using smart contracts. The legal concept of smart contracts is analyzed in detail; the specifics of the work and scope of smart contracts; the procedure for concluding, changing and terminating smart contracts; the main disadvantages of civil law support for smart contracts. An analysis of law enforcement practice in cases related to smart contracts allowed us to make proposals for improving the civil law provision of smart contracts.
For students, postgraduates and teachers of law schools and faculties, as well as a wide range of readers interested in the legal regulation of smart contracts.
TOWARDS PASSIVE FIBER BRAGG GRATING-BASED MEASUREMENT OF AMBIENT ELASTIC NOISE FOR SHM UNDER VARYING ENVIRONMENT
Authors: CALMON PIERRE , RECOQUILLAY AMAUD , ROUSSEL NICOLAS , MAURIN LAURENT , DRUET TOM , LAFFONT GUILLAUME , CHAPUIS BASTIEN
Published: December 2023

We explore here the use of fiber Bragg Gratings (FBG) transducers in optical fibers to create a minimally intrusive structural health monitoring (SHM) system. Piezoelectric transducers, commonly used for SHM, are often intrusive, so FBG transducers offer an interesting alternative thanks to their multiplexing capabilities. However, FBG can only be used as acoustic receivers and cannot emit elastic waves like piezoelectric transducers. It has ever been demonstrated in the past years that it is possible to use ambient structure-borne elastic noise, present in the structure, to retrieve the impulse response between two sensors, known as the "ambient noise crosscorrelation" method. However, passive signals are of very low amplitude, which requires a specific care in the FBG interrogation scheme, especially in realistic environment where temperature or strain variations can affect the sensing sensitivity. We present here an optimization of an optoelectronic FBG interrogation setup to measure elastic waves at ultrasonic frequencies. The system demonstrates excellent sensitivity in active signal measurements in a varying environment thanks to the realtime tracking of the setting point. Later work will present passive measurements of impulse responses under different sources of elastic noise.
THE EFFECT OF COMPLEX CORROSION PROFILES ON REMAINING WALL THICKNESS QUANTIFICATION USING SHEAR HORIZONTAL GUIDED WAVES
Authors: TZAFERIS KONSTANTINOS , TABATABAEIPOUR MORTEZA , DOBIE GORDON , PIERCE GARETH , PAPAELIA MAYORKINOS , MACLEOD CHARLES , GACHAGAN ANTHONY
Published: December 2023

Corrosion of plate and pipe structures is a major concern to many key industries, including power, maritime, and oil and gas. When there is a need to inspect large areas quickly or when access to the structure is limited, guided wave testing is often preferred over bulk wave measurements. In this work, shear horizontal guided waves are employed for wall thickness quantification. Specifically, the interaction of modes SH1 and SH0 with complex corrosion defects is investigated. The guided wave mode are selectively generated using a phased array-based approach. A pair of identical phased array probes are positioned before and after the simulated corrosion profile, to monitor the reflected and transmitted waves. The targeted mode is excited selectively using a 32-element 3 mm pitch array and guided wave modes are decomposed after a 2DFFT is performed. The cut-off frequency technique using mode SH1 is shown to be adequate when smooth wall thinning defects are considered. When sharp pits are present, mode SH0 proved sufficient to determine the pits depth.
EXPERIMENTAL AND NUMERICAL INVESTIGATIONS ON THE ACOUSTOELASTIC EFFECT ON LAMB WAVES IN ALUMINUM
Authors: BARTH TILMANN , RAUTER NATALIE , LAMMERING ROLF
Published: December 2023

Damage detection in thin-walled components is a common application of guided ultrasonic waves, such as Lamb waves, in today’s structural health monitoring. However, the method requires that external or manufacturing influences such as residual stresses, pre-stresses or stresses due to temperature are taken into account. Therefore, this work focuses on the field of acoustoelasticity and compares the influences of pre-stress on the phase velocities of Lamb waves in numerical studies with experimentally determined results. For this purpose, previous experimental and numerical investigations of the authors are extended by expanding the frequency ranges and load steps considered. The measurements are carried out using laser vibrometry to capture the velocity field of the Lamb waves in aluminum specimens subjected to uniaxial pre-stresses covering the elastic range of the material. The experimental results are thereby characterized by the use of a 2d Fourier transform to evaluate the phase velocity over large frequency ranges. The numerical data are generated using a two-step FE model that combines a nonlinear static and a linear eigenvalue computation to determine the dispersion behavior of Lamb waves subjected to pre-stress. The subsequent comparison of numerical and experimental investigations focuses on the verification of the Neo-Hookean and Murnaghan hyper-elastic material models by comparing the changes in phase velocities induced by the pre-stress. For this purpose, the numerically obtained results for different material models are compared with experimental data. The results of these investigations provide a clear indication of the suitability of the material models used here to represent the acoustoelastic effect in Lamb waves.10.12783/shm2023/36793
A REDUCED-ORDER DIGITAL TWIN FOR STRUCTURAL HEALTH MONITORING OF STEEL BRIDGES
Authors: BRENNER CHRISTOPH , THIELE KLAUS , UNGLAUB JULIAN
Published: December 2023

Conventional simulation methods, such as the Finite Element method, are less suitable for efficient and adaptive digital twins of large-scale structures needed for structural health monitoring (SHM). The complexity and scale of such structures require new simulation techniques that can handle the increasing computational demands and provide accurate results in real-time. This paper presents a novel approach for the implementation of a digital twin for SHM of steel bridges using reduced order modelling. For this purpose, the commercial software Akselos originally developed for digital twining in the aerospace industry is herein adapted to a structural engineering context. The parametric and component-based approach allows a modular structure of the digital twin with the possibility for quick adaptions according to the SHM data. The method is applied to a steel arch bridge as a case study. The example bridge was monitored over the period of a month using strain gauges at five critical locations together with temperature sensors. In addition, a targeted loading test with a truck was performed. The collected monitoring sensor data is processed and merged into the digital twin. This integration enables precise predictions about the bridge’s structural integrity, maintenance and repair planning as well as possible future damage locations. The proposed approach demonstrates the potential of the digital twin for real-time monitoring and prediction of changes in the structural integrity of large-scale structures, providing a promising solution for efficient and effective SHM of steel bridges.
VIBRATION BASED DAMAGE IDENTIFICATION IN WELDED ASYMMETRICAL STEEL FRAMES USING REGULARIZATION TECHNIQUES
Authors: KAMAL MAYANK , BANERJEE SAUVIK
Published: December 2023

The damage identification problem for a frame structure can be formulated in a linear equation in the form Aθ = b. In this formulation, matrix A represents the FE model parameters, vector θ represents the change in state variables or the mathematical parameters which are to be determined, and vector b represents the response to an external excitation. In the real test case, the matrix A can be rectangular, and the linear relation is an over-determined and ill-posed problem. The results of these ill-posed problems are non-continuous and thus require special solution techniques like regularization techniques for getting a solution. This study is aimed at damage identification based on the vibration analysis of asymmetrical multistory plane frame structures with welded joints. Time-domain response analysis assisted by various regularization techniques is used to identify the damage in the portal frame structures, which is caused due to loss of stiffness. Initially, the effectiveness of the regularization method is examined by considering a one-story steel frame with welded connection, which is then analyzed analytically with FE formulation by simulating single damage cases. The analysis has been extended for an instrumented multistory asymmetrical plane frame structures for single damage cases with static analysis. Various regularization techniques like Lð regularization or Least absolute shrinkage and selection operator (LASSO), Lï regularization, elastic net regularization, and linear regression are used to study their effectiveness in the damage identification without doing model updating of the numerical model. In the study, the Lð regularization gives better results than other methods for a single damage case. The damage identification in asymmetrical steel frames needs to be better studied, and this study can be replicated for more complex steel structures for real-life damage scenarios. This can be developed as a real-time standalone early warning system for important steel frame structures, thus ensuring their timely maintenance and continuous sustainable use.
INTELLIGENT MANUFACTURING PRINCIPLES FOR STRUCTURAL HEALTH MONITORING IN ADVANCE COMPOSITE STRUCTURES: A MACHINE LEARNING- BASED DRIVEN PLACEMENT APPROACH
Authors: PSULKOWSKI SEAN , RODRIGUEZ BRYANT , NOMAN ABDULLAH , TORINO SERGIO , DICKENS TARIK
Published: December 2023

This paper presents a fundamental investigation into the composition and placement of mechanoluminescence smart material ink to develop a predictive model framework for machine learning-based lead placement in structural health monitoring of nextgeneration fabrication methods. To address the need for multifunctionality and structural health monitoring capabilities in next-generation composite structures, this study proposes a closed-loop integration of material-driven design, multi-modal additive processing, and intelligent manufacturing principles. The proposed method utilizes mechanical simulations and in-situ sensing to establish a priori knowledge to optimize the placement, orientation, and manufacturing conditions for smart sensor embedment to maximize sensing efficiency and part performance. Experimental validation involved the hybrid machining of compact tension samples to produce a crack front in additively manufactured material. Microfluidic deposition facilitated mechanoluminescent sensor embodiment near the crack front, and the sample was then subjected to a fracture mechanic analysis, whereby the crack growth rate and direction was monitored. The resulting light emission from the sensor was captured using a mixture of high-speed video and optical sensors to determine the mechanical energy transferred during crack propagation. The resulting dataset informed an algorithmic approach to govern the placement and process parameters of the embedded mechanoluminescent sensors throughout the polymeric structure. This approach enriches the knowledge pool of digital design discovery, showcasing the capabilities of material-driven learning schema for multifunctional composite fabrication. Our investigation provides important insights into the design and development of next-generation materials with enhanced structural health monitoring capabilities. This approach provides a valuable tool for the real-time monitoring of crack propagation and material failure, which has important implications for the development of safe and reliable structures in various industrial applications.
STRUCTURAL PERFORMANCE MONITORING EMPLOYING LINEAR OBSERVER
Authors: MIAH MOHAMMAD  SHAMIM , LIENHART WERNER
Published: December 2023

Structural performances are heavily relying on the overall health conditions (damaged or healthy) of any dynamical system. Hence, it is essential to keep them monitored to avoid any partial/fully damaged situation. Due to the availability of the modern technologies, the monitoring tasks are done by employing sensors to reduce manual effort. However, the structural health monitoring via sensors deployment comes with a cost even considering all the merits of modern monitoring approach. Therefore, it is realistic to have a reasonable number of sensors on the structures in order to avoid financial hurdle or to make things more feasible. In order to minimize the sensors number, in this study, the investigations have been done via employing finite number of sensors. As a result, it might be tricky to obtain the missing states of the degree-of-freedom where sensor was not placed. Herein, the missing states are estimated by adopting a linear type observer e.g. Kalman filter as all of the states have not been observed. The numerical simulations have been performed by considering a 7-storey structure in a nearly real-time scenario via the use of MATLAB and SIMULINK. To achieve the optimal performance, the Kalman Gain was also estimated real-time by solving the Riccati equation of the investigated system. The performance of the investigated problem has been evaluated under healthy and different equivalent damaged conditions by adding external noise quantities to the healthy signals. In a nutshell, it is observed that the observer is capable of rendering the original behavior of the structure quite accurately under both healthy and damaged conditions. However, it has been observed that with the significant level of noise the observer struggles a lot attain optimal performances.
PHONONIC CRYSTAL WAVEGUIDES FOR STRUCTURAL HEALTH MONITORING APPLICATIONS
Authors: CIAMPA FRANCESCO
Published: December 2023

This paper reported applications of 3D printed acrylic phononic crystal (PC) waveguide transducers for application within NEWS methods. Experimental evidence has shown to support the mathematical formulation of the imaginary component of the complex wavenumber shift used in the design of circular PCs with sinusoidally corrugated profiles. Experimental evidence has also supported the existence of band gaps resultant from the destructive interference of both incident and reflected fundamental Lamb waves at specific frequency band gaps. These stop bands allow PC transducers to possess their unique feature of natural filters undesired frequencies, for example those originated from the ultrasonic equipment. NEWS tests have finally shown that second harmonic waves generated from the contact surfaces of micro-cracks could be accurately detected with PC waveguide transducers used during ultrasonic transmission. This technology can be applied, in future, for more accurate, automatable, and simpler microcrack detection.
A REAL-TIME FRAMEWORK FOR STRUCTURAL HEALTH MONITORING BASED ON THE INTERNET OF THINGS—AN EXPERIMENTAL STUDY
Authors: JAIN ISHNA , SREERAMA AJAY KUMAR , KALAPATAPU PRAFULLA , PASUPULETI VENKATA DILIP KUMAR
Published: December 2023

Structural Health Monitoring (SHM) is a continuous and autonomous monitoring technique for ensuring structural safety, integrity, and performance without affecting the structure itself. Advances in technology help in identifying structural defects early on, which aids in making decisions pertaining to when repair and rehabilitation are required for civil structures resulting in saving the economy. The Internet of Things (IoT) and cloud services paradigm extends a faster and more reliable SHM strategy. There have been few studies, especially in data driven SHM for a while, where SHM with IoT was implemented over traditional monitoring techniques. However, solutions presented in the recent literature have the following drawbacks viz, latency, power consumption, and real-time synchronization. Most approaches fail to meet real-time requirements, resulting in slower data visualization, retrieval, and analysis, which might lead to late warning alarms eventually leading to catastrophic events. The present research study focuses on these problems by building a completely feasible, cost-efficient, and scalable IoT architecture utilizing AWS cloud-based services with real-time constraints. Data acquired from the sensor nodes are transmitted via a communication module following star topology to the fog layer (DAQ) through MQTT to the AWS cloud and is processed through different cloud services and is visualized immediately making it an asynchronous architecture. Also, the paper presents the tradeoffs for choosing sensors, communication protocols, algorithms, and cloud services for an efficient and secure real-time approach with an aim to provide a promising platform for an efficient and proactive SHM system for civil infrastructures. Our architecture has been tested with Commercially Off-The- Shelf (COTS) hardware on the prototype models developed in the lab and the results have been validated for the same. The extension of this research work for real-time applications has also been discussed.
ADAPTING MACH-ZEHNDER INTERFEROMETERS FOR VIBRATION SENSING
Authors: MAHLOOJI HOSSEIN , AITCHISON J. STEWART , AZHARI FAE
Published: December 2023

Silicon photonic sensors are superior alternatives to traditional electromechanical sensors in applications such as vibration monitoring of data center buildings or real-time seismic wave detection at underwater fiber optic network sites. Because they communicate using optical signals, these sensors can be seamlessly integrated into a data center’s existing architecture, or underwater fiber optic networks. Their immunity to electromagnetic field interference and ability to withstand harsh environments also contribute to the suitability of these optical sensors for implementation in the nuclear energy industry and power management facilities. The Mach-Zehnder Interferometer (MZI) is an optical component that operates based on the constructive and destructive interference of light passing through its two arms. This component is usually used for electro-optical modulation in telecommunication. By allowing one of its arms to vibrate freely on a silicon chip, the MZI can also function as an accelerometer. In an MZI accelerometer, the output light power and free spectral range (FSR) correlate with applied vibration. Only, measuring the output power of an MZI at its optical resonance frequencies and/or measuring its FSR in real-time is a challenging task. We propose two modifications to resolve this issue. The first is to create an imbalance to the MZI by increasing the fixed arm length. The resulting MZI responds to applied vibration through changes in the FSR, which can be easily measured using peak-detection. The second modification involves adding a heater as an optical modulator on the fixed arm. A closed loop feedback controller can then be used to apply enough power (heat) to compensate for the vibration of the freestanding arm. The magnitude of applied power correlates with the acceleration. The proposed modifications to the MZI will enable more straightforward and efficient measurement of acceleration using silicon photonic sensors, making them an even more versatile option for a wider range of applications.
META-TRANSFER-LEARNING BASED DAMAGE DETECTION OF CFRP COMPOSITE STRUCTURES
Authors: CHEN YAN , LIU CHENG
Published: December 2023

Applying data-driven approaches in damage detection of CFRP composites is becoming increasingly popular with the rapid development of deep learning methods. However, obtaining enough data for training these data-driven models is challenging, and the presence of imbalanced data can further exacerbate the problem. Moreover, due to the limited availability of CFRP data under various structural conditions, it is desirable to make the most use of the existing data or leverage the previously learned models. To handle these problems, we propose a transfer learning-based approach, which combines the benefits of transfer learning to overcome the challenges caused by limited data, and benefits of meta training to effectively train new models. Our experiments demonstrate the efficacy of this approach in identifying damage in CFRP.
La fotografía como fundamento creativo en la pintura de Rolando Campos
Authors: Luque Teruel Andrés
Published: December 2023

El artículo plantea el procedimiento creativo del pintor Rolando Campos con superposiciones de negativos fotográficos para la obtención de imágenes e incluso espacios desdoblados, método procedente de las vanguardias cubistas que utilizó con distinto sentido y propósitos, madurando con ello un mundo formal propio y autónomo y un lenguaje que lo distinguió en el complejo mundo de la Postmodernidad.
Rafael Cerdá, una dinámica abstracta muy personal.
Authors: Luque Teruel Andrés
Published: December 2023

El artículo dilucida los argumentos plásticos de la pintura abstracta de Rafael Cerdá, pintor de Alcalá de Guadaira con amplia trayectoria y producción en pintura y escultura. Lo hace en relación con la evolución experimentada por el artista en los últimos años, en la que la depuración del lenguaje morfológico propio lo ha llevado a la correspondiente estilística, estableciendo nuevos valores e una dinámica coherente y muy reconocible.
Un teniente "molesto": el trágico destino del interbrigadista Heinz Weil
Authors: Uhl Michael
Published: December 2023

Este artículo examina las circunstancias en las que un emigrante judío-alemán que se alistó como voluntario en las Brigadas Internacionales durante la Guerra Civil española cayó bajo sospecha de «trotskismo» y fue condenado a muerte y fusilado por sus propios compañeros, a finales de 1938, presumiblemente cerca de Sant Quirze de Besora. Su destino nunca ha sido objeto de estudio. El artículo se basa en documentos inéditos de los archivos rusos y españoles.
Dones de la República i la Guerra. Taller didàctic
Authors: Boj-Cullell Isabel , Feliu-Torruella Maria , Sebares-Valle Gemma , Wilson-Daily Annie , Íñiguez-Gracia David
Published: December 2023

El treball presenta un taller sobre dones que van tenir un protagonisme rellevant durant el període de la II república i la Guerra Civil espanyola. El llistat es centra en 26 casos dels més diversos camps culturals i professionals. La voluntat es fer una aproximació senzilla però efectiva a aquestes persones. El taller està destinat a alumnes d’ensenyament secundari i, a criteri del docent o a iniciativa dels alumnes pot ser ampliat i matitzat tant com es vulgui.
1.2 GHz Repetition Rate Stretched-pulse from a Femtosecond Solid-state Yb: fiber Laser
Authors: Wang Ya , Yang Ruoao , Chen Zhendong , Pan Duo , Luo Bin , Zhang Zhigang , Chen Jingbiao
Published: December 2023

A 1.2 GHz, 106 fs stretched-pulse mode-locked laser was demonstrated, with > 700 mW output power. To the best of our knowledge, this is the highest repetition rate from NPE mode locked Yb: fiber lasers.
Compact refractive index sensing using a Mach-Zehnder interferometer based on an air gap inside of a fiber
Authors: Salceda-Delgado G , Martinez-Rios A , Porras-Culebro T E , Torres-Gomez I , Anzueto-Sanchez G
Published: December 2023

A refractive index optical fiber sensor is presented. It consists of an air gap inside the fiber, structuring a Mach-Zehnder interferometer with high-order propagating modes sensitive to the surrounding. Sensitivities around 226.8 nm/RIU were obtained.
Secure and Efficient Transmission of Spatial Data using Colored Quick Response (QR) Codes: A Case Study for the EyE Project
Authors: Cerrato Sara Ignacio , Pacios David , Rodríguez José Miguel Ezquerro , Vázquez-Poletti José Luis , Schetakis Nikolaos , Stavrakakis Konstantinos , Di Iorio Alessio , Mariño María Estefanía Avilés
Published: December 2023

We introduce a novel color QR code system for advanced encryption, leveraging spatial data, optimized on AWS. Outperforms conventional systems in speed and cost. Future applications in secure healthcare data storage and quantum color exploration.
Demonstration of Transmitter IQ imbalance Tolerant 1.24 Tb/s Transmission Over 13 km Multi-core Fiber
Authors: Mir Sameer Ahmad , Saxena Shekhar , Mishra Pramod , Mishra Arvind , Venkitesh Deepa
Published: December 2023

We demonstrate 1.24 Tb/s transmission through 13 km of four-core fiber by employing a 42 GBaud PM-16QAM signal in the presence of TX IQ imbalance. We use a novel joint equalization technique that performs carrier phase recovery while tolerating the phase and gain imbalance up to 16° and 0.87 dB respectively.
Digital holographic microscopic assessment of embryo quality
Authors: Dwapanyin George O. , Chow Darren J. X. , Tan Tiffany C. Y. , Dubost Nicolas S. , Morizet Josephine M. , Dunning Kylie R. , Dholakia Kishan
Published: December 2023

Using low power digital holographic microscopy, we non-invasively measure the refractive index of early-stage embryos. This gives an indication of lipid content, which may be used to inform or assess embryo quality for assisted reproduction.
Time- and angle-resolved photoemission spectroscopy at 250 kHz with high-intensity mid-IR excitation from an OPA at ALLS
Authors: Longa A. , Parent J.M. , Frimpong B. , Légaré F. , Jargot G. , Boschini F.
Published: December 2023

We have developed an OPA providing intense optical excitation in the infrared region (1.7 to 8 µm) that is used as a pump for time- and angle-resolved photoemission (TR-ARPES). Preliminary results on Bi2Te3 are presented.
Relationship between Zernike Aberrations in the Entrance Pupil and Vision with a 3-D Retinal Absorption Model
Authors: Vohnsen Brian
Published: December 2023

Ocular aberrations are expressed in the pupil whereas vision is triggered in the retina. Here, I report on the relationship between monochromatic Zernike aberrations and vision triggered by light absorption with a 3-D retinal model.
Resonant Lithium Niobate Waveguide Squeezer for Optical Networks
Authors: Stefszky Michael , Bruch Felix vom , Santandrea Matteo , Quiring Viktor , Ricken Raimund , Eigner Christof , Herrmann Harald , Silberhorn Christine
Published: December 2023

We present a resonant lithium niobate waveguide squeezer that includes electrodes for active cavity length stabilisation. The device produces up to 5dB of squeezing and we demonstrate active stabilisation to a reference field.
Hydrogel Diffuser for Super-Resolution Speckle Illumination Microscopy
Authors: Gao Zijun , Han Keyi , Hua Xuanwen , Jia Shu
Published: December 2023

We combine the soft material and widefield microscope system to realize speckle illumination, which allows us to enhance the spatial resolution two-fold compared to the diffraction limit. It provides new insights for super-resolution imaging.
Nanoelectromechanical control of spin-photon interfaces in a hybrid quantum system on chip
Authors: Clark Genevieve , Raniwala Hamza , Koppa Matthew , Chen Kevin , Leenheer Andrew , Zimmerman Matthew , Dong Mark , Li Linsen , Wen Y. Henry , Dominguez Daniel , Trusheim Matthew , Gilbert Gerald , Eichenfield Matt , Englund Dirk R.
Published: December 2023

We demonstrate nanomechanical strain control of tin vacancies in diamond nanostructures in a hybrid system-on-chip architecture based on piezo-actuated photonics. We show frequency tuning and acoustic control over 20 GHz and 2 GHz respectively, as well as on-chip active routing of color center single photon emission.
Efficient Measurement of the Bi-photon OAM Spectrum with Stimulated Emission Tomography
Authors: Xu Yang , Choudhary Saumya , Boyd Robert W.
Published: December 2023

High-dimensional spatial entanglement of photons is versatile yet difficult to harness. We demonstrate an efficient direct measurement of the OAM spectrum of an SPDC source using the stimulated parametric down-conversion in the low-gain regime.
Ultra-high Q Alumina Optical Microresonators in the UV and Blue Bands
Authors: He Chengxing , Wang Yubo , Waldfried Carlo , Yang Guangcanlan , Zheng Jun-Fei , Hu Shu , Tang Hong X.
Published: December 2023

We report ultra-low-loss photonic waveguides and resonators patterned from alumina thin films prepared by a highly scalable atomic layer deposition (ALD) process. We demonstrate ultra-high Q factor of 1.5×106 at 390 nm, a record value at UV bands, and 1.9×106 at 488.5 nm.
Ultra-Sensitive, Selective, and Label-Free Optical Sensing for Fundamental Science, Environmental Monitoring, and Translational Medicine
Authors: Su Judith
Published: December 2023

We present our latest work on ultra-sensitive label free biosensing, including (1) detection of single 5 nm quantum dots using microtoroid based photothermal microscopy and (2) achieving ultra-high-Q values with these devices via free-space coupling.
Femtosecond-level time transfer enabled by low-loss integrated photonics
Authors: Kowligy Abijith S. , Roslund Jonathan D. , Lunden William , Roller Franklin , Boyd Martin M. , Abo-Shaeer Jamil , Cingoz Arman , Caldwell Emily D. , Newbury Nathan R. , Sinclair Laura C. , Stuhl Benjamin K. , Swann William C. , Deschenes Jean-Daniel
Published: December 2023

A pair of optical frequency comb-based transceivers employing photonic-chip based heterodyne detection were evaluated for two-way time transfer over a 30-km freespace link, demonstrating frequency instability < 3 × 10-18 at 2×103 s with ∼6 pW of received power.
Self-Sustaining Water Microdroplet Resonators Using 3D Printed Microfluidics
Authors: Awerkamp Parker A. , Hill David , Fish Davin , Wright Kimi , Bashaw Brandt , Nordin Gregory P. , Camacho Ryan M.
Published: December 2023

We present a method of maintaining a water microdroplet resonator using a 3D printed microfluidic system, which operates in an ambient environment and allows for quality factors as high as 200 million.
Brownian motion of mechanical resonators due to optical-absorption induced spatially varying thermal bath
Authors: Shaniv Ravid , Reetz Chris , Regal Cindy A.
Published: December 2023

We experimentally investigate the thermal behavior of mechanical modes embedded in a phononic crystal membrane under optical-absorption induced non-uniform thermal bath, through measurements of Brownian motion, and identify important design principles for mechanical sensing.
Hyperspectral Speckle Imaging for Detecting Objects Obscured by Heavily Scattering Medium
Authors: Balaji Muralidhar Madabhushi , Ahsanullah Danyal , Rangarajan Prasanna
Published: December 2023

This submission describes two approaches for assembling the images of objects obscured by a heavily scattering medium (100 Transport Mean Free Paths) from hyperspectral speckle images acquired under tunable laser illumination.
Tunable Directional Couplers in a Scalable Piezo-MEMS Platform
Authors: Wen Y. Henry , Boyle Julia , Zimmermann Matthew , Leenheer Andrew J. , Shugayev Roman , Dong Mark , Clark Genevieve , Gilbert Gerald , Eichenfield Matt , Englund Dirk R.
Published: December 2023

Tunable directional couplers (TDC) are basic building-blocks for photonic processors and controllers. We demonstrate a 2x2 TDC via piezo-actuated gap tuning between two evanescently-coupled waveguides exhibiting 20 dB bar-to-cross tuning and response beyond 500 MHz.
Self-interference of high harmonic beams driven by Hermite Gaussian beams
Authors: Schmidt David D. , Westlake Nathaniel , de las Heras Alba , Pablos-Marín José Miguel , Serrano Javier , Hernández-García Carlos , Lei Yuhao , Kazansky Peter , Adams Daniel , Durfee Charles
Published: December 2023

We demonstrate a new scheme for high harmonic generation driven by a 2- lobe Hermite-Gaussian mode. The passive approach allows for combining high harmonic spectroscopy and interferometry to retrieve the nonlinear dynamics of the process.
Transverse Displacement Sensing with Optimal Structured Illumination
Authors: He Wenhua , Pluchar Christian M. , Ozer Itay , Rubenok Allison , Wilson Dalziel J. , Guha Saikat
Published: December 2023

We evaluate the optimal spatial mode for transverse beam displacement sensing with a camera receiver, using Fisher information as a metric. We find that the Long- Baseline Telescope mode significantly outperforms the HG00 mode, for Gaussian-apodized apertures.
Octave Spanning Microcomb Dispersive Wave Optimization from Self-Balanced Soliton under Kerr-Induced Synchronization
Authors: Moille Grégory , Chojnacky Michal , Javid Usman A. , Shandilya Pradyoth H. , Menyuk Curtis R. , Srinivasan Kartik
Published: December 2023

The robustness of a cavity soliton enables the optimization of the short dispersive wave emission through frequency and power self-balancing under Kerr-induced synchronization, leading to a > 15 × power increase at the 388 THz comb tooth.
Integrated Optical Frequency Division with SiN-based Reference Cavity and Microcomb
Authors: Sun Shuman , Wang Beichen , Liu Kaikai , Wang Jiawei , Liu Ruxuan , Jahanbozorgi Mandana , Yang Zijiao , Morton Paul , Nelson Karl , Blumenthal Daniel , Yi Xu
Published: December 2023

Integrated optical frequency division is demonstrated with SiN-based reference cavity and microcomb. Phase noise reduction of 36 dB is measured, achieving -115 dBc/Hz phase noise at 10 kHz offset for 100 GHz carrier frequency.
Brillouin Scattering from Longitudinal-Shear Hybrid and Surface Acoustic Waves in Tailored Chalcogenide Waveguides
Authors: Neijts Govert , Lai Choon Kong , Riseng Maren Kramer , Choi Duk-Yong , Yan Kunlun , Marpaung David , Madden Stephen J. , Eggleton Benjamin J. , Merklein Moritz
Published: December 2023

We model and experimentally measure Brillouin scattering from multiple guided phonon modes in tailored chalcogenide waveguides, offering new possibilities for signal processing and sensing applications. Furthermore, our model predicts the existence of Brillouin surface waves.
Dynamically reconfigurable metalens using Sb2Se3 phase change material for focusing and defocusing performance
Authors: Ye Jiachi , Shen Chen , Kang Haoyan , Wang Hao , Patil Chandraman , Altaleb Salem , Heidari Elham , Asadizanjani Navid , Sorger Volker J. , Dalir Hamed
Published: December 2023

Here we propose using phase change material Sb2Se3 for non-volatile, rapid focusing and defocusing. Due to its unique capabilities equipped with a resilient ITO microheater, showcasing progress towards dynamic meta lenses and beamforming applications.
Unidirectional Imaging Using Diffractive Materials
Authors: Li Jingxi , Gan Tianyi , Zhao Yifan , Bai Bijie , Shen Che-Yung , Sun Songyu , Jarrahi Mona , Ozcan Aydogan
Published: December 2023

We present deep learning-optimized diffractive materials forming a broadband and polarization-insensitive unidirectional imager that permits imaging along only one direction while blocking the light transmission in the reverse direction.
Influence of Increased Pulse Duration on the Nonlinear Optical Response of Indium Tin Oxide
Authors: Iqbal Saleem , Vijayakumar Surendar , Alam M. Zahirul , Boyd Robert W.
Published: December 2023

We characterize the optical nonlinearity of indium tin oxide near its epsilon-near-zero condition under picosecond pulsed illumination. Z-scan measurement in both reflection and transmission is used to disentangle separate contributions from bulk and interfacial effects.
2D Edge Enhancement using Induced Volume Reflection Gratings in Lithium Niobate
Authors: Scott Austin M. , Banerjee Partha P.
Published: December 2023

System transfer functions for volume reflection gratings in lithium niobate are derived and numerically solved to show the 2D edge enhancement in the undiffracted order.
Fully Integrated Photonic Tensor Core Accelerator for Neural Network Applications
Authors: Peserico N. , Ma X. , Nouri B. Movahhed , Dalir H. , Shastri B. J. , Sorger V. J.
Published: December 2023

Machine Learning applications have exploded in recent times. Here, we present the first fully-integrated Photonic Tensor Core accelerator, capable of computing Neural Networks by integrating all the optical components, from laser to photodetectors.
WaveFlex Biosensor: Label-Free Quantitative Detection of Escherichia coli Using a LSPR-based Fiber Optic Sensor
Authors: Liu Xuecheng , Oliveira Sandro , Gonçalves Bárbara , Singh Ragini , Zhang Bingyuan , Kumar Santosh , Marques Carlos
Published: December 2023

A WaveFlex biosensor based on localized surface plasmon resonance enables label-free quantitative detection of Escherichia coli. The sensor exhibits a linear detection range and potential for practical applications in pathogenic bacteria sensing.
Airy Light-sheet Microscope using a Volume Hologram
Authors: Hsu Hung-Chuan , Vyas Sunil , Huang Kuang-Yuh , Liao Hsien-Shun , Luo Yuan
Published: December 2023

A volume-hologram-based Airy light-sheet is designed and implemented in a light-sheet microscope to provide a large field-of-view, improved axial resolution, and a compact setup. The Richardson-Lucy deconvolution method was used to improve image quality.
Light-sheet fluorescence microscope using metalens
Authors: Hsu Hung Chuan , Tseng Ming Lun , Hsieh Ting-Yu , Vyas Sunil , Chu Cheng Hung , Tsai Din Ping , Luo Yuan
Published: December 2023

Integrating a nanophotonic meta-surface with a cylindrical phase mask as the illumination arm of a light-sheet fluorescence microscope (LSFM) can provide a variety of advantages, such as a compact system setup and high transmission efficiency.
Integrated Lithium-Niobate Nonlinear Photonics Enabled by Wet-Etching Technology
Authors: Mao Wenbo , Jia Di , Awan Kashif M. , Li Fu , Yang Lan
Published: December 2023

We demonstrated various chip-scale lithium-niobate nonlinear-optical devices using wet etching fabrication techniques. The low-cost wet etching process achieves device performance comparable to widely used dry processes.
Using Optical Microscopy to Study Synaptic Vesicle Docking and Rapid Calcium-Mediated Fusion with an In Vitro Reconstitution of the SNARE Machinery
Authors: Chatterjee Atrouli , Rothman James E.
Published: December 2023

To study the molecular interactions involved in vesicle docking and subsequently in Ca2+-triggered release, we introduce a reconstitution of the genetically-validated core protein machinery within a geometry the enables the detailed characterization of vesicle fate.
Volumetric Live-Cell Autofluorescence Imaging Using Fourier Light-Field Microscopy
Authors: Ling Zhi , Han Keyi , Liu Wenhao , Hua Xuanwen , Jia Shu
Published: December 2023

This study introduces Fourier light-field microscopy technique for rapid, volumetric live-cell autofluorescence imaging. The method enables multicolor imaging and quantitative analysis of lysosomal and mitochondrial interactions, facilitating insights into native cellular states with minimized photodamage.
Binocular Near-Eye Light-Field Displays with Schematic Eye Models
Authors: Wu Pingfan , Zhang Zheng , Wu Sihan , Peng Liang
Published: December 2023

After evaluating various eye models, we employed Azeye15 for designing and analyzing near-eye light-field displays. A binocular display was constructed from two monocular light-fields. Observational validation confirmed model-based resolution and field-of-view estimates. Comments and questions should be directed to the Optica Conference Papers staff (tel: +1 202.416.6191, e-mail: cstech@optica.org).
Deformation estimation along a desired direction using digital speckle correlation technique
Authors: Gautam Surya Kumar , Naik Dinesh N
Published: December 2023

To measure deformation along a specific direction while minimizing computational steps, we propose a modified version of the digital speckle correlation technique. This technique allows for rapid estimation of deformation along the desired direction.
Flat Feet diagnosis tool through Photogrammetry and Image Processing aided by Machine Learning Models
Authors: Gambhir Laksh , Kashyap Aditya , Malhotra Yugnanda , Urvi
Published: December 2023

Pes planus, often known as flat feet, can cause pain and swelling and can also lead to Arthritis, Bone spurs, Bunions, and calluses and is typically diagnosed primarily by a physical examination or by a medical expert. It is mostly done through an old, rudimentary ink test in which the person has to wet his feet and walk and then the physician will examine the print of their feet for abnormalities. We propose a smartphone-based screening tool using close-range photogrammetry & Image Processing through machine-learning models based on scientific data and parameters.
Speckled-learned Classification of Partially Coherent Vortex Beams
Authors: Sharma Chayanika , Kumar Vijay
Published: December 2023

Speckle-based deep learning approach for the classification of partially coherent vortex beams is presented. Remarkably, this approach achieved 100% classification accuracy.
Use of Multilayer Perceptron Classifier for Determination of Single Mode Operation in Rib Waveguides
Authors: Aravind Aditya , Mujawar Fahad M , Sinha Rajat Kumar , Bhowmick Kaustav
Published: December 2023

The present work reports the performance of a MLP neural network architecture, classifying single-mode operation for Rib waveguides with varying refractive indices, wavelengths, and geometrical parameters, with an accuracy of ~ 90% and faster computation.
Enhanced Light Manipulation and Energy Absorption through Collective Mie Resonances in Titanium Nanoantennas
Authors: Islam Md Sakibul , Raney Neal , Holzer Aaron , Babicheva Viktoriia E.
Published: December 2023

This work explores the combination of lattice resonances and lossy nanoanten-nas made of titanium for enhanced light manipulation and energy absorption. We discuss their fabrication and applications for nanophotonic devices and light harvesting.
Laser-Induced Graphene Foam-Based Perfect Broadband Absorber
Authors: Devinder Shital , Joseph Shereena , Joseph Joby
Published: December 2023

In this study a Polyimide film exposed to ultraviolet laser forms porous graphene foam. Laser-Induced Graphene Foam (LIGF) so produced absorbs >99% solar spectrum, reaching 90.4°C in <60 sec at 1kW/m2 irradiation.
Synthesis and Characterization of Activated Carbon-Based Starch Biocomposite
Authors: Santhosh Neha P , N Pooja , Mal Sib Sankar , Mazumder Nirmal
Published: December 2023

Plastic overuse has resulted in severe environmental issues. Bioplastics, derived from biological sources like starch offer a potential solution to this problem. However, starch-based bioplastics show high susceptibility to moisture absorption, leading to poor mechanical strength. This study involves the use of activated carbon as reinforcement to improve the functional properties of starch bioplastics.
Features of sum frequency generation by broadband laser pulses with opposite frequency chirps
Authors: I.V. Kuzmin , S.Yu. Mironov , M.A. Martyanov , E.A. Khazanov
Published: December 2023

The features of highly efficient third harmonic generation (oo-e phase matching) and second harmonic generation (eo-e and oe-o types) by broadband chirped laser pulses are considered in this work.
Utilizing a Maskless Process for Generating Quantum Emitter Arrays in Silicon Carbide
Authors: Kim Hyemin , Cho Yong-Hoon , Ko Young-Ho
Published: December 2023

Point defects in silicon carbide are promising candidates for quantum applications as photonic and spin qubits. However, challenges remain in the effective and precise methods for creation of defect center. Here, we realized direct, maskless generation of nitrogen-vacancy center ensemble arrays in high purity 4H-SiC via helium FIB.
Electromagnetic Plane Wave Propagation through a Chiral Fresnel Zone Plate
Authors: Buaossa Nagi A. , Chatterjee Monish R.
Published: December 2023

A methodology based on electromagnetic (EM) propagation across planar chiral slabs resulting in the computation of Fresnel coefficients (FCs), is applied to the case of a Fresnel zone plate (FZP) where the standard, clear circular zones are replaced with a magnetic, chiral material. Using appropriate amplitude transmission profiles across the zones, EM diffraction past the FZP is examined using a modified version of the Fresnel-Kirchhoff integral in near- and far-fields, and the emergence of multiple focal planes along the longitudinal axis is tracked based on both hard paraxial and also more general off-axis approximations. The resulting defocusing effects in the transverse planes at and near individual focal planes are also examined for point sources and 2D transparencies.
Fabrication of All-dielectric, 3D Chiral Metamaterial Using Two-photon Lithography
Authors: Rani Sweta , Jaiswal Arun , Das Rahul Kumar , Singh Gaurav Pratap , Palwe Ajinkya , Saxena Sumit , Cheng Wenlong , Shukla Shobha
Published: December 2023

We report the fabrication of all-dielectric, 3D chiral metamaterial using two-photon lithography, addressing the limitations of metallic metamaterial. The electromagnetic behaviour of the structure has been numerically studied using COMSOL.