bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact of physical activity in pregnant women on maternal health
Authors: Małek Róża , Warzyszak Paweł , Milczek Maria , Żołyniak Wojciech , Tomasik Mikołaj , Hawranik Izabela , Niski Szymon , Żaba Ziemowit , Lisowska Aleksandra , Skrzypek Mateusz
Published: January 2023

Introduction: Pregnancy is an important period in a woman's life. One of the most essential things people can do to improve their health both physical and mental is taking regular physical exercise. Healthy people, people with chronic illnesses or disabilities as well as pregnant women benefit from regular physical activity. All pregnant women should be physically active, except in certain situations when there are medical contraindications.
Objective of the study: The purpose of this study is to summarize the benefits of regular physical activity during pregnancy.
Materials and methods: A review of the literature available on the PubMed database was carried out, the key words used were: ,,pregnancy,,, ,,physical activity,,, ,,gestational diabetes,,, ,,hypertension,,, ,,pre-eclampsia,,.
Results: Physical activity increases the chance of a normal pregnancy and a successful outcome. In the absence of obstetric or medical contraindications, physical activity during pregnancy is desirable and advisable. Exercise results in fewer complications for both the pregnant woman and the newborn.
Conclusions: The best results from physical activity in pregnancy are obtained when the pregnant woman exercises regularly, for example, 3 times a week for 30-60 minutes. It is advisable that for it to be regular aerobic training of moderate intensity of at least 150 minutes per week.
La brecha digital como factor de exclusión social: situación actual en España.
Authors: González-Benito Ana , Gutiérrez-de-Rozas Belén , Otero-Mayer Andrea
Published: January 2023

A nivel global, se ha generado un escenario excepcional en el ámbito educativo derivado de la crisis sanitaria causada por el COVID-19 en el que las Tecnologías de la Información y la Comunicación (TIC) cuentan con un papel relevante. El objetivo de este trabajo es proporcionar una panorámica actualizada de la situación del uso de las TIC en España y reflexionar sobre cómo la desigualdad digital está afectando a los menores, convirtiéndose en un factor de exclusión social. Para ello, se realiza un análisis descriptivo de los datos de la Encuesta sobre Equipamiento y Uso de Tecnologías de Información y Comunicación en los hogares (INE, 2020). Los resultados muestran que, a pesar de la evolución en la posesión y uso de dispositivos electrónicos y de Internet, existen diferencias en función de variables como el hábitat o los ingresos. Además, el mero hecho de poder acceder a Internet y la tenencia de dispositivos tecnológicos no garantiza el uso óptimo, generándose una “brecha social” que se está convirtiendo en un claro factor de exclusión. Los resultados de este estudio ponen de manifiesto la necesidad de diseñar e implementar políticas públicas que garanticen la igualdad de oportunidades de acceso y adecuado uso de Internet de todos los niños, niñas y adolescentes, independientemente de los recursos económicos de sus familias y del lugar en el que vivan, evitando, de este modo, cualquier situación de exclusión derivada de imposibilidad de adaptación a la nueva realidad, así como de incrementar la formación en competencias digitales en la formación inicial y permanente del profesorado.
Imbricación del Metaverso en la complejidad de la educación 4.0: Aproximación desde un análisis de la literatura
Authors: George-Reyes Carlos Enrique , Ramírez-Montoya María Soledad , López-Caudana Edgar Omar
Published: January 2023

El Metaverso como objeto de estudio se ha incrementado debido a su potencial para crear entornos inmersivos para acercar a las personas a realidades alternas. Aunque las investigaciones realizadas permiten conocer aspectos conceptuales y de aplicación, existe un conocimiento limitado sobre cómo se imbrica con la complejidad de la educación 4.0. En este estudio se realizó una revisión sistemática de la literatura (SLR) con 231 investigaciones recopiladas de Scopus y Web of Science en las que se imbricó el Metaverso con los componentes de la educación 4.0. Los resultados evidenciaron: (a) un amplio crecimiento de las publicaciones desde el año 2022, (b) el predominio del uso del Metaverso en la industria del diseño de algoritmos y las ventas al detalle, (c) una fuerte colaboración para desarrollar infraestructura 4.0 entre investigadores de Estados Unidos de Norteamérica, Corea del Sur, China, Reino Unido y Japón, (d) la aplicación del Metaverso utilizando tecnologías inmersivas, aumentadas y el diseño de avatares, así como su aplicación como estrategia de elearning. Se concluye que el tema ha despertado interés en la academia, no solo por su incidencia en el conocimiento de las tecnologías emergentes, sino también por su trascendencia en la evolución de ecosistemas digitales.
Group Structure and Information Distribution on the Emergence of Collective Intelligence
Authors: Tang Ming , Liao Huchang
Published: January 2023

More and more decision-making problems are being solved by groups. Collective intelligence is the ability of groups to perform well when solving complex problems. Thus, it is important to encourage collective intelligence to emerge from groups. In this study, we explore how two critical characteristics of groups, that is, group structure and individual knowledge in groups, influence the emergence of collective intelligence. To do this, we propose a measure for group structure using the collaboration network of a group and a measure for the distribution of individual knowledge in groups. Group structure is measured based on the intensities of links and whether the network is hierarchical or flat. The distribution of individual knowledge is measured from the perspective of whether group information is shared or unique. Social interactions among group members and individual changes in opinion are modeled based on a simulation technique. We find that unbalanced information distribution undermines group performance, whereas group structure can modify the effect of information distribution. We also find that groups with broadly distributed knowledge are good at solving complex problems.

Funding: This work was supported by the National Natural Science Foundation of China [Grants 72171158, 71771156 and 71971145].
¿Y si un día regresa el lobo?
Authors: Sánchez Vidal Rafael Omar , Dias Pedro A. D.
Published: January 2023

Imagina que eres un animal que vive en un hermoso bosque y desde que naciste has vivido con tu familia en completa tranquilidad. Gracias a la extinción del lobo han estado seguros. Y es que, desde hace muchos años ningún miembro de tu familia ha sido atacado por quien era su peor depredador. Pero, ¿y si un día el lobo regresa reclamando el territorio que le pertenecía?
Synergist effect of antiretroviral therapy adherence and viral load suppression on quality of life of people with HIV/AIDS
Authors: Nurwijayanti Nurwijayanti , Rias Yohanes Andy , Nasution Nurhafizah , Samsudin Rinza Rahmawati , Priyono Djoko , Rosyad Yafi Sabila
Published: January 2023

Aims:

This study investigated the synergistic and independent effects of adherence to antiretroviral therapy (ART) and viral load on quality of life (QoL) among people with HIV/AIDS.

Methods:

This was a cross-sectional study of 129 patients with HIV/AIDS. The WHOQOL-BREF and the Morisky Medication Adherence Scale were used to measure QoL and adherence respectively. Information on viral load and CD4 cell count was obtained from patients' records and verified by a physician. An additive interaction method was used to estimate the synergistic effect of the linear regression.

Findings:

Patients who were adhering to ART and had an undetectable viral load had significantly higher scores on four domains of QoL − environment, physical health, social relationships and psychological − than those who were non-adherent. Moreover, ART adherence and undetectable viral load had a positive synergistic effect on QoL after controlling for covariate variables.

Conclusion:

Participants were more likely to have a good QoL if they had both undetectable viral loads and good ART adherence.
Parental and family determinants of the Flynn effect
Authors: Rajaleid Kristiina , Vågerö Denny
Published: January 2023

Research about the Flynn effect, the secular rise in IQ, is heavily based on conscript data from successive male birth cohorts. This inevitably means that two distinct phenomena are mixed: fertility differences by IQ group (‘compositional Flynn effect’), and any difference between parents and children (‘within-family Flynn effect’). Both will influence trends in cognitive ability. We focused on the latter phenomenon, exploring changes in cognitive abilities during adolescence within one generation, and between two successive generations within the same family. We identified determinants and outcomes in three linked generations in the Stockholm Multigenerational Study. School and conscript data covered logical/numerical and verbal scores for mothers at age 13, fathers at 13 and 18, and their sons at 18. Raw scores, and change in raw scores, were used as outcomes in linear regressions. Both parents’ abilities at 13 were equally important for sons’ abilities at 18. Boys from disadvantaged backgrounds caught up with other boys during adolescence. Comparing fathers with sons, there appeared to be a positive Flynn effect in logical/numeric and verbal abilities. This was larger if the father had a working-class background or many siblings. A Flynn effect was only visible in families where the father had low general cognitive ability at 18. We conclude that there is a general improvement in logical/numeric and verbal skills from one generation to the next, primarily based on improvement in disadvantaged families. The Flynn effect in Sweden during the later 20th century appears to represent a narrowing between social categories.
How does Carer’s Allowance in the UK construct family carers? History and recent developments
Authors: Gulland Jackie
Published: January 2023

This article explores the historical development of Carer’s Allowance in the UK, alongside legal challenges and recent proposals for changes to it in Scotland. Eligibility criteria for receipt of this allowance construct carers as people of ‘working age’ who provide care within dyadic relationships and exclude people whose unpaid caring work is more complex and/or interdependent. Disabled people are simultaneously constructed as dependent recipients of this care. Carer’s Allowance provides symbolic but conditional recognition of unpaid caring, while doing little to meet the financial or support needs of carers. This symbolism reinforces the role of gendered families as the main providers of care and of disabled people as dependent.
Numerical scrutiny of a silica-titania-based reverse rib waveguide with vertical and rounded sidewalls
Authors: Butt M. A. , Kozłowski Ł. , Piramidowicz R.
Published: January 2023

In this work, a modal analysis
of reverse rib waveguide (RRW) structures based on a silica-titania
platform is carried out. The silica-titania waveguide films can be
deposited via the sol-gel method and dip-coating technique. To combine
this low-cost deposition technique with the economical fabrication
method, we propose to structure the samples via wet-chemical etching.
Due to the isotropic nature of wet etching, the waveguide architecture
with rounded sidewalls is considered to model the RRW. Additionally,
the modal conditions and bending loss are compared with the RRW with
vertical sidewalls. It is assumed that this study will be beneficial
for comprehending the modal conditions of waveguide structures with
perfectly vertical and rounded sidewalls.
Equations for designing a dialyte with minimal TSA based on the caustic surfaces
Authors: López-Bautista María C. , Avendaño-Alejo Maximino , Velázquez-Gómez Ismael , Santiago-Alvarado Agustin
Published: January 2023

A method to design a dialyte based on the caustic surfaces is presented, with
correction at the third-order spherical aberration. We predefined,
a priori, the value for the back focal length of the
separated doublet for two different wavelengths to calculate their
radii of curvature, which depend on all the parameters involved in the
refraction process. Additionally, we approached the caustic surface by
applying a Taylor series, which provided the analytical spherical
aberration coefficient at the third order. Two alternatives to design
achromatic separated doublets are provided. Finally, we extended the
method to design achromatic cemented triplets.
Programmable Time-Multiplexed Squeezed Light Source
Authors: Tomoda Hiroko , Yoshida Takato , Kashiwazaki Takahiro , Umeki Takeshi , Enomoto Yutaro , Takeda Shuntaro
Published: January 2023

We demonstrate a time-multiplexed squeezed light source, which can programmably choose each squeezing level and direction of the output sequential squeezed-state pulses and is thus essential for large-scale quantum information processing in the time domain.
Silicon Photonic Optical-Electrical-Optical Conversion with Gain Over Unity
Authors: Rubio Rivera Hector A. , van Niekerk Matthew , Preble Stefan F.
Published: January 2023

We present an on-chip Optical-Electrical-Optical silicon photonic non-linear function with open-loop gain over unity. This design enables the exploration of on-chip optical amplification with full control of the optical swing similar to silicon electronic inverters.
Quantum Enhanced Measurement Using SU(1,1) Nonlinear Interferometers
Authors: Li Xiaoying , Huo Nan , Li Jiamin , Cui Liang , Guo Xueshi , Ou Z. Y.
Published: January 2023

SU(1,1) nonlinear interferometer (NLI) employs parametric amplifiers as the wave splitting and mixing elements. We show the applications of NLI in multi-parameter measurement, in phase measurement and in loss-tolerant measurement of continuous variable entanglement.
Improved Visibility of Spectral Two-photon Quantum Interference Introduced by Multiphoton Components
Authors: Kashi Anahita Khodadad , Caspani Lucia , Kues Michael
Published: January 2023

Spectral two-photon quantum interference between a thermal field and a heralded state is studied theoretically and experimentally, demonstrating visibility enhancements as a result of the contribution of multiphoton components within the heralded photon state.
Single-photon camera with an adaptively gated image intensifier
Authors: Kundu Sanjukta , Szuniewicz Jerzy , Firlik Grzegorz , Lapkiewicz Radek
Published: January 2023

We experimentally demonstrate a hybrid camera setup, in which the number of photons detected within each frame can be controlled by gating an image intensifier adaptively, enabling spatially resolved single-photon counting measurements.
300-Gbit/s PAM-4 Transmissions Using a Low-Complexity Blind Volterra Nonlinear Equalizer in SOA-based Hybrid WDM-FSO-PON Transmission Systems
Authors: Reza Ahmed Galib , Costas Marcos Troncoso , Browning Colm , Barry Liam
Published: January 2023

This paper reports 300-Gbit/s proof-of-concept PAM-4 transmissions demonstrating a hybrid WDM-PON system with integrated fiber/FSO links. A power budget in excess of 30.8-dB/λ is achieved using an SOA and a truncated blind Volterra equalizer.
Graded-Azimuthal-Index-Fiber-Based Realization of All-Transformations on Higher-Order Poincaré Sphere of Vector Vortex Beams
Authors: Srinivasu S. , Wanare H.
Published: January 2023

We propose a graded azimuthal index (GRAIN) fiber, which offers efficient manipulations and control of the vector vortex beams on the Higher-Order Poincaré sphere.
Spin to orbital angular momentum transfer in nonlinear wave mixing
Authors: da Silva B. Pinheiro , Buono W. T. , Pereira L. J. , Tasca D. S. , Dechoum K. , Khoury A. Z.
Published: January 2023

We demonstrate the spin to orbital angular momentum transfer in frequency up-conversion with structured light beams. A vector vortex is coupled to a circularly polarized Gaussian beam in noncollinear second harmonic generation under type-II phase match. The second harmonic beam inherits the Hermite-Gaussian components of the vector vortex, however, the relative phase between them is determined by the polarization state of the Gaussian beam. This creates an interesting crosstalk between spin and orbital degrees of freedom, allowing the angular momentum transfer between them.
Spin-Orbit Photonics in 3D Rotated Anisotropic Materials
Authors: Jisha Chandroth P. , Beeckman Jeroen , Nolte Stefan , Alberucci Alessandro
Published: January 2023

We investigate light propagation in point-wise rotated anisotropic materials, where rotations are non-planar. We demonstrate the emergence of effective electric and magnetic fields –proportional to the gradient of the rotation angle- acting on the photons.
Microfabrication of dielectric resonators with Q-factor exceeding 5 billion
Authors: Jin Naijun , Mason David , Luo Yizhi , Kharel Prashanta , Isichenko Andrei , Blumenthal Daniel J. , Papp Scott B. , Rakich Peter T.
Published: January 2023

We demonstrate a new method to fabricate arrays of micro-Fabry-Pérot resonators supporting Q-factors as high as 5 Billion and highly tailorable resonator geometries to serve applications ranging from frequency metrology to nonlinear optics.
Optical vortex braids in Tornado waves
Authors: Brimis Apostolos , Makris Konstantinos G. , Papazoglou Dimitrios G.
Published: January 2023

We numerically investigate the trajectories of coupled optical braids of high intensity lobes and vortices in Tornado waves. Likewise, we show that a properly phase modulated ring-Airy beam transforms to a Tornado wave upon propagation.
Perceptual reality through holographic near-eye displays [invited]
Authors: Kim Dongyeon , Lee Byounghyo , Nam Seung-Woo , Lee Byoungho
Published: January 2023

Holographic near-eye display emerges as a promising platform of virtual and augmented reality. We introduce approaches to enhance depth perception with holographic near-eye displays and evaluate them with our benchtop prototypes of holographic near-eye displays.
Fabrication and Characterization of Large Area Plasmonic Metasurface Lenses
Authors: Burckel D. Bruce , Musick Katherine M.
Published: January 2023

Metasurface lenses are fabricated using membrane projection lithography following a CMOS-compatible process flow. The lenses are 10-mm in diameter and employ 3-dimensional unit cells designed to function in the mid-infrared spectral range.
Lithium Niobate EO Modulator for Integrated Photonics at Visible Wavelengths
Authors: Deenadayalan Venkatesh , Yin Peichuan , Fanto Michael , Leake Gerald , Coleman Daniel , Preble Stefan
Published: January 2023

An electro-optic modulator operating at visible wavelengths is demonstrated with TFLNOI (Thin Film Lithium Niobate on Insulator) flip-chip bonded on a foundry fabricated SiN (Silicon Nitride) photonic integrated chip, achieving a π phase shift with VπL = 7.5V.
Computational Holography for 3D Television: Generation, Compression and Display Systems
Authors: Blinder David , Birnbaum Tobias , Muhamad Raees K. , Schelkens Peter
Published: January 2023

High-end holographic display systems require processing of large data volumes. This bottleneck can be addressed with multiple technologies in computational holography, involving computer-generated holography, compression algorithms (including JPEG PLENO) and hardware-software co-design.
Symbolic Encoding Scheme for Optoelectronic Element-wise Multiplications
Authors: Wang Youchao , Mouthaan Ralf , Kadis Andrew , Wilkinson Timothy
Published: January 2023

We propose a scheme for free-space optoelectronic element-wise multiplications, the Symbolic Encoding Scheme. The formation and processes related to the scheme are discussed, followed by an optical setup to experimentally demonstrate the practicability.
One-Time Training That Transfers to Arbitrary Highly Faulty Optical Neural Networks
Authors: Vadlamani Sri Krishna , Hamerly Ryan , Englund Dirk
Published: January 2023

We present a one-time error-aware software training technique that outputs matrices that produce near-ideal performance on any arbitrary highly faulty photonic neural network with hardware phase errors up to 5x larger than present-day fabrication tolerances.
Discriminatory potential of photoacoustic spectroscopic fingerprints integrated with machine learning to distinguish between different organs: ex vivo
Authors: Rodrigues Jackson , A Akhil K , Mahato Krishna Kishore
Published: January 2023

Photoacoustic signatures from different organs like heart, kidney, liver, lungs, and spleen were recorded and subjected to machine-learning-based analysis for discrimination. The outcomes clearly suggest potentiality of machine-learning-enabled photoacoustic spectroscopy in organs classification.
Ghost Exchange: Ferromagnetic-antiferromagnetic Phase Transition in Linear Optics of Non-magnetic Dielectrics
Authors: Khan Emroz , Narimanov Evgenii E.
Published: January 2023

With the recent discovery of electromagnetic ghost waves, the dynamics of correlated fermionic systems and their associated phase transitions can be mapped to the linear optics of a layered composite of biaxial-anisotropic and isotropic media.
Optomechanical-Solitons-Assisted Acoustic Detection in an Optical Microcavity
Authors: Fu Zhoutian , Yang Lan
Published: January 2023

We study acoustic sensing in the optomechanical soliton regime using an optical microtoroid. The optomechanical soliton can assist the detection of low-frequency acoustic signals and a 12dB enhancement was demonstrated in the experiments.
Impact of Raman Scattering on Temporal Reflection from a Short Soliton
Authors: Zhang Junchi , Donaldson William , Agrawal Govind P.
Published: January 2023

We study theoretically temporal reflection of a pulse from a short soliton decelerating because of Raman scattering. The reflected pulse can be temporally focused, analogous to a beam reflected by a parabolic mirror.
Multi-modal Mammoscope with Photoacoustic, Ultrasound, and Elastographic imaging capabilities
Authors: Zheng Emily , Zhang Huijuan , Hu Wentao , Doyley Marvin M. , Xia Jun
Published: January 2023

We developed a multi-modal imaging system that combined photoacoustic, ultrasound, and elastography for comprehensive evaluation of the breast. The system was validated in phantoms and human imaging studies.
Pupil Engineering in Miniscopes for extended depth-of-field Neural Imaging
Authors: Greene Joseph , Xue Yujia , Alido Jeffrey , Matlock Alex , Hu Guorong , Kiliç Kivilcim , Davison Ian , Tian Lei
Published: January 2023

We demonstrate an extended-depth-of-field miniscope (EDoF-Miniscope) for high contrast neural imaging through an optimized binary diffractive optical element (DOE). Our platform achieves a spatial resolution of 0.9-μm and 2.8x axial elongation across fixed neural samples.
Silicon-photonics acoustic detector for ultrahigh-resolution imaging
Authors: Hazan Yoav , Levi Ahiad , Nagli Michael , Rosenthal Amir
Published: January 2023

A new ultrasound-detection technology is developed for imaging with resolutions beyond 20 µm using an optical resonator coated by a sensitivity-enhancing polymer, which also eliminates the parasitic effect of surface acoustic waves.
Spectroscopic characterization of a squeezed quantum microcomb on a chip
Authors: Parnell Emily A. , Yang Zijiao , Jahanbozorgi Mandana , Jeong Dongin , Sun Shuman , Pfister Olivier , Lee Hansuek , Yi Xu
Published: January 2023

We report spectroscopic characterization of 40 quantum modes within 1 THz optical span for a vacuum squeezed microcomb. An analytical model is developed to illustrate the role of cavity dispersion in determining quantum mode spectrum.
Generating High-Dimensional Entanglement on a Silicon Photonic Chip
Authors: Manfreda-Schulz Evan , Elliot J. Dulany , van Niekerk Matthew , Proctor Daniel , Tison Christopher C. , Fanto Michael L. , Preble Stefan F. , Howland Gregory A.
Published: January 2023

We present an on-chip source of path-entangled photonic qudits by parallel excitation of 8 microring pair sources. The device is foundry-fabricated and uses advanced packaging techniques, a significant advance in generating high-dimensional quantum light on-chip.
Electro-Optic Coefficient of Thin-Film Lithium Niobate up to 270 GHz
Authors: Chelladurai Daniel , Kohli Manuel , Fedoryshyn Yuriy , Leuthold Juerg
Published: January 2023

The linear electro-optic coefficient of lithium niobate on insulator (LNOI) thin films has been characterized over a broad range of modulation frequencies from 50 MHz to 270 GHz. A coefficient of 25-30 pm/V was found.
Attosecond Rabi oscillations in bright high harmonic emission in the X-ray regime driven by XUV pulses
Authors: de las Heras Alba , Hernández-García Carlos , Serrano Javier , Popmintchev Tenio , Plaja Luis
Published: January 2023

The advent of intense coherent XUV sources opens up a novel regime of extreme nonlinear light-mater interactions. We theoretically identify attosecond resonant dynamics in high harmonic generation driven by XUV pulses, leading to efficient X-ray emission.
Ultrafast all-optical switching of telecom single photons
Authors: Purakayastha Ujaan , Lualdi Colin P. , Kwiat Paul G.
Published: January 2023

Low-loss, ultrafast photon routing is an enabling technology for optical quantum information processing. We demonstrate a 20 GHz, all-optical switch for 1590-nm photons from a heralded single-photon source, achieving a signal-to-noise ratio of 140:1.
Photon-Pair Generation in a CMOS Microring: Impact of Spontaneous Raman Scattering and Its Mitigation
Authors: Ramesh Anirudh , Wang Imbert , Gluhović Đorđe , Kramnik Danielius , Fargas Cabanillas Josep M. , Lee Kim F. , Stojanović Vladimir , Popović Miloš A. , Kumar Prem
Published: January 2023

We study spontaneous four-wave mixing and spontaneous Raman scattering (SpRS) in a CMOS microring cavity in the C-band and find that the latter contributes a significant fraction to the signal/idler photon flux. We expect operation in the O-band to be less affected by SpRS due to higher confinement of the O-band light in crystalline Si in this device.
Electrically programmable wide bandgap phase-change material Sb2S3 enabling multi-level non-volatile photonics
Authors: Chen Rui , Fang Zhuoran , Miller Forrest , Kumari Khushboo , Saxena Abhi , Majumdar Arka
Published: January 2023

For the first time, we demonstrate the electrical programming of the emerging wide-bandgap phase-change material Sb2S3 integrated photonic devices with high endurance (> 800 cycles), low optical loss (<1.0 dB) and many levels (> 10 levels).
Independent Optical and Microwave Injection Locking of Kerr Frequency Combs by an Auxiliary Laser
Authors: Savchenkov Anatoliy , Matsko Andrey B. , Taheri Hossein
Published: January 2023

We demonstrate experimentally two regimes of coherent injection locking of a Kerr frequency comb to another counter-propagating modulated laser. In disjoint regions, the microcomb locks to either an optical harmonic or the external modulation signal.
The effect of pulse duration on the longitudinal structure of femtosecond filaments
Authors: Goffin A. , Tartaro A. , Larkin I. , Milchberg H.M.
Published: January 2023

Our use of a microphone array has enabled single-shot measurements of femtosecond filament longitudinal structure and energy deposition [1]. Here we study the effect of pulse duration on filament length and axial structure.
On-chip generation and telecom-compatible processing of complex photonic systems in time and frequency
Authors: Sciara Stefania , Yu Hao , Chemnitz Mario , Fischer Bennet , Roztocki Piotr , Crockett Benjamin , Reimer Christian , Caspani Lucia , Kues Michael , Munro William J. , Chu Sai T. , Little Brent E. , Moss David J. , Wang Zhiming , Azaña Jose , Morandotti Roberto
Published: January 2023

We exploit standard silicon-based chips and fiber telecommunications components to generate and process complex entangled photon states in the discrete time and frequency domains (two-level time-entangled photons, d-level frequency-entangled photon pairs, and three-level cluster states).
Generation of CEP-stable, octave-spanning MIR pulses based on DC-OPA with two kinds of nonlinear crystals: Towards a TW-class, single-cycle laser source
Authors: Xu Lu , Midorikawa Katsumi , Takahashi Eiji J.
Published: January 2023

By combining the dual-chirped optical parametric amplification and two kinds of nonlinear crystal (type-I BiBO and type-I MgO), a one-octave bandwidth (1.45 μm – 3 μm), carrier-to-envelope phase (CEP) stable infrared (IR) laser pulses have been achieved. Our approach will generate several tens of millijoule, single-cycle MIR pulse by taking advantage of a few hundred mJ pump energy and a bulk compressor.
Ultrafast Optical Switching
Authors: Alqattan H. , Hui D. , Zhang S. , Pervak V. , Chowdhury E. , Hassan M. Th.
Published: January 2023

Here we demonstrate the optical switching with attosecond speed in a dielectric system. We will present the capability of modulating the reflectivity of the fused silica in the strong field following the optical driver field with sub-femtosecond control resolution.
Large-Scale Thermo-Optic Phase Shifter Array with Feedback Photodiodes
Authors: Gurses B. Volkan , Fatemi Reza , Khachaturian Aroutin , Hajimiri Ali
Published: January 2023

We present a 288-element thermo-optic phase shifter array with feedback MZIs and photodiodes and demonstrate a thermal crosstalk correction algorithm. We also compare PAM and PWM driving and investigate the scaling limits of TOPS arrays.
Enhancing efficiency of microwave to optical signal transduction using Lamb wave supermodes in piezo-optomechanical platforms
Authors: Khurana Ankur , Jiang Pisu , Balram Krishna C.
Published: January 2023

We show that engineering mode hybridisation between a Lamb-wave resonator and a high g0 mode of an optomechanical cavity can be used to significantly enhance the microwave to optical signal transduction efficiency in piezo-optomechanical platforms.
Lateral terahertz wave emission from laser ionized water lines
Authors: Chen Yuxuan , He Yuhang , Tian Zhen , Dai Jianming
Published: January 2023

We investigate the lateral terahertz emission from laser ionized water lines. Energy, waveform, and spectral characteristics of the terahertz radiation are investigated as functions of the water line position at 90° detection angle.
Adaptive optics 3D phase-contrast retinal imaging
Authors: Feng Guanping , Kunala Karteek , Yang Qiang , Schallek Jesse
Published: January 2023

Illuminating the retina with a point-scan system, we measured angle-resolved light that returns from the retina to render 3D phase-contrast and plenoptic imaging of various retinal cells and structures.
Bridging between Adaptive Optics and Clinical Fluorescence Lifetime Imaging Ophthalmoscopy of the In Vivo Human RPE by Exciting at Different Wavelengths
Authors: Tang Janet A.H. , Kunala Karteek , Parkins Keith , Huynh Khang T. , Yang Qiang , Hunter Jennifer J.
Published: January 2023

At the cellular-scale, there was a strong correlation between the mean fluorescence lifetime using excitation wavelengths 532 and 473 nm with adaptive optics fluorescence lifetime ophthalmoscopy (FLIO), simplifying the comparison of AOFLIO and clinical FLIO.
Age-related local changes in the morphology and transparency of the human crystalline lens using SS-OCT
Authors: Gupta Ashish , Ruminski Daniel , Villar Alfonso Jimenez , Toledo Raúl Duarte , Gondek Grzegorz , Panezai Spozmai , Artal Pablo , Grulkowski Ireneusz
Published: January 2023

In this paper, we present age-related changes in the crystalline lens and investigate which OSD zones are more responsible for changes in the lens’s morphology and transparency with ageing. We present both qualitative image and quantitative data analyses of the findings.
Molecular Dynamics for Microscopic Analysis of Refractive Index in Amorphous Hafnium Oxides
Authors: Lee Dayeong , Kim Jungmin , Park Namkyoo , Yu Sunkyu
Published: January 2023

We investigate the phase transition in developing amorphous hafnium oxides for optoelectronic applications by employing the molecular dynamic simulation. Our study provides a microscopic picture on the macroscopic optical properties.
Functional and Structural Imaging of Retinal Tissue with Spatio-Temporal Optical Coherence Tomography (STOC-T)
Authors: Węgrzyn Piotr , Borycki Dawid , Tomczewski Sławomir , Liżewski Kamil , Auksorius Egidijus , Curatolo Andrea , Wojtkowski Maciej
Published: January 2023

We report on a novel human retina imaging system based on Spatio-Temporal Optical Coherence Tomography (STOC-T). We present structural images and spatially-resolve functional responses of the retinal tissue to white light stimulation.
Effect of Periodic Poling on Self-phase Modulation in Thin-film Lithium Niobate Waveguides
Authors: Gül Gamze , Abdelsalam Kamal , Fathpour Sasan , Lee Kim F. , Kanter Gregory S. , Kumar Prem
Published: January 2023

We study self-phase modulation of sub-picosecond telecom wavelength pulses in partially periodically poled thin-film lithium niobate waveguides. We experimentally and computationally investigate the effect of phase mismatching on spectral broadening.
A genetic algorithm for the optimization of optical detection systems design
Authors: Vazquez Patricia , Brazzano Ligia Ciocci , Veiras Francisco , Sorichetti Patricio
Published: January 2023

Optical detection systems design is a complex task involving coupled constraints. We propose a merit function and a genetic algorithm that has several advantages over other methods, such as systematic search or Monte Carlo.
Numerical Linearization Algorithm for Calculating Eigenvalue Spectra of Lumped Laser Models
Authors: Shandilya Pradyoth H. , Wang Shaokang , Menyuk Curtis R.
Published: January 2023

Accurate analysis of the stability of laser systems is difficult without simplification using averaged models. We describe an easy-to-implement algorithm to estimate the stability of lumped laser systems using accurate amplifier models.
Characterization of high-harmonic generation spectra in Fibonacci quasicrystals
Authors: Navarrete Francisco , Bauer Dieter
Published: January 2023

We study theoretically the characteristics of the high harmonic generation process in Fibonacci quasicrystals in comparison with crystals and disordered materials. We show numerically calculated spectra and analyze the intensity and parity of the harmonics.
20-mJ class, 1 kHz cryogenic Yb:YAG regenerative amplifier for mid-IR OPCPA pumping
Authors: Morrill Drew , Carlson Daniel , Hettel Will , Lesko Daniel , Wu Tsung-Han , Diddams Scott , Murnane Margaret , Kapteyn Henry , Hemmer Michael
Published: January 2023

We report a compact, cryogenic Yb:YAG regenerative amplifier that delivers >19-mJ energy pulses at 1-kHz with near-TEM00 spatial profile. The excellent power and pointing stabilities are ideal for OPCPA pumping over weeks-long continuous operation.
Multi-Output Quantum Pulse Gate: a High-Dimensional Temporal-Mode Decoder
Authors: Serino L. , Gil-Lopez J. , Stefszky M. , Ricken R. , Eigner C. , Brecht B. , Silberhorn C.
Published: January 2023

We demonstrate a temporal-mode decoder based on a multi-output quantum pulse gate. Measurement tomography on a complete set of five-dimensional mutually unbiased bases confirms single-photon-level operation at telecom wavelengths with an average fidelity of 96%.
Device-Aware Quantum Photonic Simulator for Gaussian States
Authors: Carver Christian , Probst Austen , Arnesen Benjamin , Fisher Benjamin , Stowell Tyler , Camacho Ryan M.
Published: January 2023

We demonstrate the ability to simulate Gaussian quantum photonic circuits using compact models of real devices and open-source PIC simulation tools. This allows rapid iteration of integrated quantum photonic circuit designs before fabrication.
Spectroscopic measurements of the optical Kerr effect and two-photon absorption in GaP
Authors: Viteri-Pflucker Valeria , Wahlstrand Jared K.
Published: January 2023

Using supercontinuum spectral interferometry with a tight focus, we investigate the wavelength-dependent optical nonlinearity in gallium phosphide in the indirect to direct two-photon absorption regime.
Zn-Porphyrin doped MAPbBr3 single crystals within minutes by novel crystallization method
Authors: Soopy Abdul Kareem K. , Parida Bhaskar , Najar Adel
Published: January 2023

Less toxic perovskite is realized with a rapid crystal growth process obtaining Zn-PP incorporated MAPbBr3 single crystals. After Zn-PP passivation, there was more than 4-fold rise in photoluminescence intensity with a 7 nm redshift.
Coherent Interference Between Two Linearly Polarized TEM00 CW-Lasers on a Crown Glass Surface
Authors: Bahrim Cristian , Bharadwaj Rishi , Azam Nurul
Published: January 2023

We report experimental evidence of coherent interference between a weak probe and a stronger coupling linearly polarized TEM00 cw-laser beams of same wavelength on the vibratory dipoles of crown glass surface.
Design of Fast All-Optical Switches in Si3N4 Photonic Integrated Circuits for Single-Photon Routing
Authors: Ruf Fabian , Faurby Carlos Fernando Duarte , Paesani Stefano , Wang Ying , Nielsen Lars , Midolo Leonardo , Volet Nicolas , Heck Martijn J. R.
Published: January 2023

Ultralow-loss optical switches with GHz switching bandwidth suitable for single-photon routing are essential for quantum photonic applications. Design, modelling and first experimental validation of required components in a scalable Si3N4 photonic integration platform are presented.
Thermodynamic Control of Nanoliter Volumes of CS2 via Stimulated Brillouin Scattering
Authors: Geiien Andreas , Popp Alexandra , Das Debayan , Junaid Saher , Poulton Christopher G. , Chemnitz Mario , Marquardt Christoph , Schmidt Markus A. , Stiller Birgit
Published: January 2023

We present Brillouin-Mandelstam measurements of hard-to-reach, thermodynamic regimes in fully-sealed, CS2-filled liquid-core optical fibers. We investigate the Brillouin response in the positive and negative pressure regimes for isochoric and isobaric processes.
Revealing Non-Hermitian Band Structure of Photonic Floquet Media
Authors: Park Jagang , Cho Hyukjoon , Lee Seojoo , Lee Kyungmin , Lee Kanghee , Park Hee Chul , Ryu Jung-Wan , Park Namkyoo , Jeon Sanggeun , Min Bumki
Published: January 2023

We experimentally reveal the unique non-Hermitian band structures of a photonic Floquet medium emulated in the microwave regime. We observe the presence of the momentum gaps and the subharmonic parametric oscillations therefrom.
Nonlinear Light Intensity Dependence of a Photosensor Protein Detected by Time-Resolved Diffusion Method
Authors: Terazima Masahide , Shibata Kosei , Nakasone Yusuke
Published: January 2023

A time-resolved diffusion method was used to reveal reactions of a photosensor protein, BlrP1. It was found that conformational changes for biological function depends nonlinearly on the excitation light intensity.
View-dependent Distortion Correction Method for a Multiview Lenticular Light Field Display System
Authors: Lee Eunbi , Jo Youngjin , Nam Seung-Woo , Lee Byoungho
Published: January 2023

The light field system is a promising technology for future 3D display. However, most light field system utilizes imaging optics, so if there is a view shift from the center axis, view distortion is inevitable. To overcome this issue, we propose an inverse mapping method with biharmonic spline interpolation for each view. The experimental result verified that the proposed method alleviated view distortion for a multi-view display system.
Superimposition of two integral imaging systems for depth enhancement by using polarization grating and dihedral corner reflector
Authors: Kheibarihafshejani Sahar , Park Jae-Hyeung
Published: January 2023

A method for increasing the depth of the integral imaging system by using polarization grating (PG) is proposed. The PG overlays the transferred images, by relay optic or dihedral corner reflector array (DCRA), from two displays.
Impact of strain on a long-period grating based coupling device
Authors: Sousa Liliana M. , Fernandes Gil M. , Oliveira Ricardo , Nogueira Rogério N. , Rocha Ana M.
Published: January 2023

We developed a long-period grating based single-mode fiber to single-mode fiber coupler. By applying strain to the fibers, the power transfer at 1476 nm and 1552 nm increased 6 dB and 8 dB, respectively.
Lithium borate glass as laser material
Authors: Elías Janet , Vallejo Miguel
Published: January 2023

In this work, we present the plasmon effect of a novel nano-material to design a lithium borate glass to become a possible laser material.
Room Temperature Narrowing of Organic Polaritons in Fabry-Perot Cavity
Authors: Wanasinghe Sachithra T. , Rury Aaron
Published: January 2023

Polaritons form when molecular excitons strongly couple to the cavity photon in a Fabry-Perot (FP) resonator. Our studies suggest narrowing near the exciton-photon resonance can be observed in organic microcavities towards extended polariton lifetimes.
Raman scattering multipole moment of OAM light interaction in methanol
Authors: Mamani Sandra , Alfano Robert R.
Published: January 2023

Enhancement and decrease in Raman intensity is experimentally observed in methanol due to the match-up of the multipole moment from the vibrational orbital structure symmetry of the liquid sample and the OAM light.
Investigation of Asymmetric Dissipative Soliton through Gaussian Process in an Er-Doped Fiber Ring Laser
Authors: Chen Beibei , Zhao Minghe , Liu Xuanyi , Fu H. Y. , Li Qian
Published: January 2023

We experimentally and numerically investigate an asymmetric dissipative soliton in an Er-doped fiber ring laser. Cavity parameters in simulation for the match between simulation results and experimental results are determined quickly via Gaussian process optimization.
Generation of High Repetition Rate Pulse Train by Using a Suitably Designed Silicon Core Optical Fiber
Authors: Ghosh Binoy Krishna , Ghosh Dipankar , Basu Mousumi
Published: January 2023

A silicon core single-mode fiber with silica cladding is designed and optimized. High repetition rate pulses are generated through it from a single input pulse at sufficiently shorter optimum length compared to standard silica fibers.
Polarization Beam Combiner with Broad-band Isolation for Blocking Back Reflection
Authors: Ye Huiliang , Singh Surinder , Ye Xiaohua
Published: January 2023

A polarization beam combiner with broad-band isolation to block back reflection is proposed and evaluated. Simulation and experimental results show the 35dB above isolation band could reach more than 250nm in NIR range.
Design of a Wavelength Selective Tetra-narrowband Absorber using Defective Photonic Crystal Structure with Two MoS2 Defects
Authors: Priyam Angkur Ghosh , Sen Aditi , Rahman Sabrina , Basak Ayon Kumar , Imam Safayat-Al
Published: January 2023

We propose a wavelength selective tetra-narrowband absorber using a 1D defective photonic crystal structure with only two MoS2 defects that can achieve greater than 90% absorption at four different wavelengths in the visible spectrum.
Optical Phase-sensitive Properties in Histological Discrimination of Colon Tissue Samples
Authors: Ganoza-Quintana J. L. , Fanjul-Vélez F. , Arce-Diego J. L.
Published: January 2023

Histology presents drawbacks, such as processing artifacts and delayed diagnosis. Phase-sensitive parameters of microscopic colon images at 10x, 20x and 40x are calculated to statistically evaluate their discrimination capabilities of healthy and tumor tissues.
Nonlinear Structured Illumination Microscopy by Employing Saturable Absorbing Material
Authors: Tiwari Anupriya , Samanta Krishnendu , Joseph Joby
Published: January 2023

Nonlinear structured illumination microscopy (SIM) is presented by employing saturable absorbing (SA) material which converts the sinusoidal illumination to a nonlinear pattern. The simulation shows that the effective excitation contains multiple harmonics and provides superior resolution relative to conventional SIM.
Assessment of Collagen Orientation in Scleroderma Using Thin Tissue Sections
Authors: Krishnamurthy Priya , Sharma Mahima , Unni Sujatha Narayanan , Joseph Leena Dennis , Anandan S.
Published: January 2023

Optical biopsy is critical in examining tissue specimens for aiding diagnostics. Here, we correlate image entropy, spatial correlation, and Mueller matrix derived orientation parameter to study the organization of collagen in unstained thin scleroderma samples.
Colorless PAM-4 for WDM-PON Systems using a Fabry-Perot Laser Configuration
Authors: Puentes Natalia Perez , Cortés Jhon Anderson Lopera , Soto Ana María Cárdenas , Caro Juan Diego Zapata , Torres Jhon James Granada
Published: January 2023

We propose a PAM-4 WDM-PON system using a colorless transmitter based on a Fabry-Perot laser. Transmissions of ~41km at 5 Gbps are reached with better performance than a conventional VCSEL.
Vector Wave Formulation for Mode Computation and Propagation for High Index Contrast Waveguides
Authors: Choudhary Pratiksha , Sharma Anurag
Published: January 2023

A split-step non-paraxial finite difference method is presented to analyze 3-D vector wave equation for high index contrast waveguides. The method can be used to obtain modes as well as propagation of an incident field.
MRI histogram analysis to differentiate three brain tumor types: meningioma, glioma, and pituitary tumors
Authors: Sijilmassi Ouafa
Published: January 2023

The objective of this study was to examine histogram analysis parameters derived from MRI to distinguish between different types of brain tumors according to the type of tissue in which they arise and where they are located.
Relative Permittivity Measurement of Pure and TNT, RDX and C L-20 Mixed Soil in the Terahertz Region
Authors: Menchu Nagaraju , Koalla Rajesh , Krishna R.N. Vamsi , Periketi Naveen , Chaudhary A.K.
Published: January 2023

A preset volume of powdered explosive is mixed with soil. By assessing the soil and soil explosive mixture, the Maxwell-Garnett effective medium theory can calculate an explosive's permittivity. Method validated by RDX, TNT, and CL-20.
Collaborative error-immune information transfer with OAM modes of light
Authors: Bala Rajni , Asthana Sooryansh , Ravishankar V.
Published: January 2023

OAM modes of light are already being used for a number of quantum communication tasks. As an application, we present a collaborative information transfer scheme that allows to share error-free information even through noisy channels.
Transparency in a two-level system using state phase control
Authors: Malinovskaya Svetlana A. , Ramaswamy Aneesh
Published: January 2023

We demonstrate that the two-level system may be transparent to the resonant radiation if specific conditions for the state coherence are met. The conclusion is based on the closed system dynamics with chirped pulse adiabatic passage. A Floquet formalism is developed for transparency in the absorption spectrum for open system dynamics.
Slow Light Enhanced Accelerometry
Authors: Zhu Ruoxi , Zhou Zifan , Bonacum Jason , Shahriar Selim
Published: January 2023

We show how to realize a slow-light enhanced accelerometer using a Mach-Zehnder Interferometer. A proof-of-principle experiment carried out with Rb vapor is found to produce results in close agreement with the theoretical model.
Functionalization of Optical Fiber Tips using Colloidal Nanoparticles
Authors: Sutradhar Agnimitra , Gupta Shilpi
Published: January 2023

We demonstrate a cost-efficient fabrication technique to functionalize optical fiber tips with periodically arranged colloidal nanoparticles using soft lithography and capillary-assisted self-assembly process. The technique works with nanoparticles of different sizes arranged in different periodicities.
Dispersion Engineering: An Optical Designer's Perspective
Authors: Mait Joseph N. , van der Gracht Joseph
Published: January 2023

Advances in fabrication technology have made it possible not only to vary an element's index of refraction spatially, but also its dispersion. However, most tools for dispersion engineering are based on rigorous electromagnetic theory, which is not the conventional language of optical designers. We present an approach to dispersion engineering that is congruent with conventional optical design.