bluuebunny/crossref_metadata_2025 huggingface dataset:
A Mid-Infrared Dual-Comb Spectrometer for High Sensitivity Multi-Component Trace Gas Detection
Authors: Nitzsche Leonard , Goldschmidt Jens , Kießling Jens , Wolf Sebastian , Kühnemann Frank , Wöllenstein Jürgen
Published: January 2021

A dual-comb spectrometer with flexibility in spectral coverage, resolution and central wavelength where all affect sensitivity is optimized to simultaneously determine atmospheric concentration levels of CO2 and N2O from spectra taken at 4470 nm.
Spectrally Extended and Synchronized Microcombs with an Auxiliary Pump Laser
Authors: Zhang Shuangyou , Silver Jonathan , Del’Haye Pascal
Published: January 2021

We demonstrate that the optical spectrum of microcomb can be coherently extended by bichromatic pumping: one generates a bright soliton microcomb while a second pump generates a second frequency comb via cross-phase modulation.
Measuring high dimensional entanglement using fractional orbital angular momentum.
Authors: Nape Isaac , Rodríguez-Fajardo Valeria , Huang Hsiao-Chih , Forbes Andrew
Published: January 2021

We present a method for measuring the dimensionality of an entangled system in the spatial degree of freedom using anaylsers that project onto fractional orbital angular momentum modes.
Thermal Crosstalk Resilient Integrated Optical Attenuator
Authors: De Souvaraj , Das Ranjan , Varshney Ravi , Schneider Thomas
Published: January 2021

We design and simulate a robust integrated optical attenuator involving an air-filled trench and deep trench which is resilient to crosstalk. Further, a 50% more power efficient thermal phase shifter is presented on silicon platform.
Multi-level Nonvolatile Photonic Memories Using Broadband Transparent Phase change materials
Authors: Meng Jiawei , Miscuglio Mario , Sorger Volker J.
Published: January 2021

Here we demonstrate a low-loss multi-state photonic memory using broadband transparent phase change materials (GeSbSe), which can be efficiently reprogrammed on-chip.
3D Live Cell Imaging Using High-Resolution Fourier Light-Field Microscopy
Authors: Hua Xuanwen , Jia Shu
Published: January 2021

We develop a high-resolution Fourier light-field microscope for 3D live cell imaging. We demonstrate a lateral resolution of 300~700 nm and an axial resolution of 500~900 nm within a depth of focus of ~4 μm.
Super-resolution via plasmonic structured illumination and intensity correlations
Authors: Classen Anton , Agarwal Girish S.
Published: January 2021

Combining structured illumination with the evaluation of intensity auto-correlations enhances superresolution microscopy, both in widefield and confocal. We show how plasmonic illumination boosts the performance creating a huge, gapless OTF support.
Automatic Compensation of Phase Aberrations in Digital Holographic Microscopy for Ovarian Cancer Cell Drug Sensitivity Survey by Detecting Object-free Regions on Synthetic Difference Image
Authors: Che Leiping , Xiao Wen , Pan Feng
Published: January 2021

Method enables automatic compensation of phase aberrations of digital holographic microscopy by detecting object-free regions on synthetic difference image is proposed and applied to monitor the response of ovarian cancer cells exposed to cisplatin.
Multimodal Microscopy for Label-free Monitoring of Mesenchymal Stromal Cells
Authors: Lee Elizabeth , Baranski Maciej , Yong Zixin , Venkatraman Lakshmi , Yong Derrick , Barbastathis George
Published: January 2021

We devised a multimodal microscopy system utilizing both quantitative phase and autofluorescence imaging as a label-free and non-destructive tool for monitoring mesenchymal stromal cells during cell culture.
Light Bullets by Design
Authors: Carbajo Sergio , Lemons Randy , Liu Wei , Frisch Josef C , Fry Alan , Robinson Joseph , Smith Steve
Published: January 2021

we examine an integrated laser architecture offering adaptive spatio-temporal field distribution and topology, including control over its amplitude, and linear, spin angular, and orbital angular momenta to exploit its topology.
Simphony: An Open-Source Photonic Integrated Circuit Simulation Framework
Authors: Ploeg Sequoia , Gunther Hyrum , Camacho Ryan M.
Published: January 2021

We present a fast and extensible open-source toolbox for simulating photonic integrated circuits. We include example simulations demonstrating novel features and show that our toolbox performs calculations 20x faster than leading commercial software.
Terahertz parametric generation with pulse train pump beam
Authors: Kawaguchi Rie , Hayashi Shin’ichiro , Kawase Kodo , Murate Kosuke
Published: January 2021

We developed a pulse trained Terahertz parametric generator. Each wavelength was generated in nanosecond intervals by the pulse train pump beam to the crystal. This system enables real-time identification of reagents under shielding materials.
Electromagnetic p-Polarized Wave Propagation Across an Achiral/Chiral Interface with First-Order Material Dispersion and Dielectric Loss
Authors: Muntaser Akram , Chatterjee Monish R
Published: January 2021

Propagation of p-polarized electromagnetic waves across an achiral/chiral (ACC) interface is re-visited using Fresnel coefficients (FCs) to examine the effect of first-order material dispersion and dielectric loss in the chiral region on the transmitted wave.
Singularities of Surface Nanostructuring in Liquid With a Pair of Femtosecond Laser Pulses
Authors: Romashevskiy S. A. , Ashitkov S. I.
Published: January 2021

Ring diffraction patterns form on silicon upon irradiation in liquid with two femtosecond laser pulses following at sub-millisecond delay, as a result of diffraction of the second pulse by the bubble generated near the surface by the first pulse.
Image transmission across a magnetic dispersive chiral boundary under uniform and Gaussian-profile beams
Authors: Chatterjee Monish R. , Buaossa Nagi A.
Published: January 2021

Recent work involving image transmission across a magnetic achiral/chiral interface by use of Fresnel coefficients under different incident angles and permittivity/permeability ratios is extended to include dispersive chiral dielectrics with uniform and Gaussian-profile incident beams.
Conicoid Plasma Mirrors Adjustment by a Multi-Sub-Aperture (MSA) Method
Authors: Zhang Dongjun , Guang Zhe , Zhu Ping , Xie Xinglong , Huang Hongbiao , Zhang Xuejie , Zhu Jianqiang , Liang Yan , Liu Cheng
Published: January 2021

We proposed a multi-sub-aperture adjustment method for conicoid plasma mirrors. We took the hyperbolic mirror as an example to verify its feasibility experimentally. The misalignment was efficiently eliminated and the focal spot was triply reduced.
Feedback-Assisted Wavefront Shaping for Monitoring Chemical Reactions Inside Opaque Media
Authors: Anderson Benjamin R. , Gese Natalie , Eilers Hergen
Published: January 2021

We utilize feedback-assisted wavefront shaping to monitor the fluorescence and Raman spectra of molecular crystals inside opaque media as they undergo chemical reactions. This technique has applications in the study of explosives and novel propellants.
Photothermal Spectra of Semiconductors
Authors: Olaizola Aristides Marcano , Sánchez José Luis Luna , Tan Songjian , Zhang Tianyao
Published: January 2021

We measure and calibrate the photothermal spectra of Gallium Arsenide and Cadmium Telluride in the 400-800 nm spectral region using a white light source. The spectra yield the photothermal quantum yields of the materials.
Entanglement in many-body quantum systems
Authors: Khatiwada Pawan , Mirza Imran
Published: January 2021

Here we briefly revisit entanglement in bipartite quantum systems and mention issues to its extension to multipartite situations. Finally, we indicate the role of entanglement in the description of many-body systems through matrix product states.
Large-scale Ising Emulator with All-to-All Connected Four-Body Interactions
Authors: Zhang He , Kumar Santosh , Huang Yu-Ping
Published: January 2021

We propose a nonlinear-optics approach to emulate Ising machine containing a million spins with weighted all-to-all four-body interactions. Using adaptive feedback control, this machine can be evolved to find the optimum solution of Ising problem.
Low-Power Carrier-Envelope Phase Detection using Few-Cycle Pulse Pairs
Authors: Zeng Bing , Duan Lingze
Published: January 2021

The feasibility of carrier-envelope phase (CEP) detection using few-cycle pulse pairs is numerically analyzed in a two-level system. Much lower power requirement is demonstrated in comparison with single-pulse schemes.
Optical Properties of Dilute CuAl1-xFexO2 Delafossite Alloys
Authors: Aziziha M. , Akbarshahi S. , Ghosh S. , Pramanik P. , Sooriyagoda Rishamli , Romero A.H. , Thota S. , Pittala S. , Bristow Alan D. , Seehra M.S. , Johnson M.B.
Published: January 2021

For powder samples of CuAl1-
x
Fe
x
O2(x = 0, 0.01, 0.05, and 0.1), measured optical properties are compared with model simulations and phonon spectra are compared with simulations based on weighted dynamical matrix approach.
Optimization of Multilayer Optical Films with Unsupervised Learning, reinforcement learning and genetic algorithm
Authors: Anqing Jiang , Yoshie Osamu
Published: January 2021

We proposed an optical film optimal algorithm using a three-step machine learning algorithm. which applies to design layered thin-film materials. As a verification, the absorption of the designed solar selective absorption film is 91%.
Laser-Assisted 2D Material-Based Highly Responsive Flexible Photosensor
Authors: Ghosh Rapti , Hsieh Ya-Ping , Chen Yang-Fang
Published: January 2021

Upon laser irradiation, the sensitivity gets enhanced up to 22 times by the insertion of two-dimensional materials having a large density of state due to the speeding up of carrier dissociation at the heterojunction interface.
Maximizing Orbital Angular Momentum Exhibited by Fundamental Modes of Silicon Strip Waveguides
Authors: Patton Ryan J. , Reano Ronald M.
Published: January 2021

We maximize the orbital angular momentum of fundamental silicon waveguide modes by optimizing the cross-section. The maximum computed values for SiO2 and air cladding are 0.36 and 0.52 h/2π per photon, respectively, at 1550 nm wavelength.
Modeling Phase and Amplitude Errors in Optical Phased Arrays and Comparison to Measurement
Authors: Pruessner Marcel W. , Mahon Rita , Tyndall Nathan F. , Stievater Todd H. , Rabinovich William S.
Published: January 2021

We model optical phased arrays. Random intensity errors minimally affect the beam. Random phase errors (Δϕ <0.3×2π) substantially affect the beam power but only minimally the beam width. Systematic errors in the splitters are also investigated.
Time-Dependent Speckle in Coherence Domain Tomography
Authors: Yu Ping , Lyon Margaret , Ma Lixin
Published: January 2021

We developed a high-speed Fourier domain optical coherence tomography to detect time-dependent speckle. The technique uses autocorrelation to calculate time-constant of speckle. The developed technique can be used to evaluate health status of tissue.
Efficient Reservoir Computing using FPGA and Electro-optic Modulation
Authors: Kumar Prajnesh , Jin Mingwei , Bu Ting , Kumar Santosh , Huang Yu-Ping
Published: January 2021

We experimentally demonstrate a reservoir computing system consisting of an electro-optic modulator and FPGA electronics. On the NARMA10 benchmark test, the normalized root mean square error can achieve as low as 0.134.
Radiative Lifetime Measurement of the Excited State of Sodium Dimers
Authors: Pant Lok Raj , Wenner Scott , Converse Joseph , Bayram Burcin
Published: January 2021

Lifetimes of the first excited-state of sodium dimers are measured using time-resolved spectroscopy. Molecular fluorescence decay-time was recorded using time-correlated photon-counting technique and lifetime was extracted using a Stern-Volmer plot.
Photoionization of Non-Metal Crystals by a High-Power Few-Cycle Femtosecond Laser Pulse
Authors: Gruzdev Vitaly , Sergaeva Olga
Published: January 2021

The Keldysh-type parabolic-band model and asymptotic expansion with respect to ratio of cycle duration to pulse-width are combined to derive analytical formula for the photoionization rate by few-cycle laser pulses with large spectral bandwidth.
Dissipative Five-level Quantum Systems: A Quantum Model of Photosynthetic Reaction Centers
Authors: Wang Zibo , Mirza Imran
Published: January 2021

Recent studies suggested that coherence can enhance the photosynthetic yield. In this work, we show how photosynthesis can be modeled as a five-level quantum heat engine and how its environmental interaction leads to noise-induced coherence.
Modeling INQNET’s time-bin qubit teleportation experiments using phase space methods
Authors: Lauk Nikolai , Valivarthi Raju , Davis Samantha , Narváez Lautaro , Gim Yewon , Hussein Meraj , Iskander George , Korzh Boris , Mueller Andrew , Oblak Daniel , Peña Cristián , Rominsky Mandy , Shaw Matthew , Simon Christoph , Sinclair Neil , Spentzouris Panagiotis , Spiropulu Maria , Tang Dawn , Xie Si
Published: January 2021

We apply phase space methods to simulate time-bin qubit teleportation experiments at the Caltech Quantum Network (CQNET) and Fermilab Quantum Network (FQNET) [1]. Our model includes all experimentally relevant parameters and contributions from the multi-photon events.
On the Correctness of the Polarization-Induced Orbital Angular Momentum Field in Optical Fibers
Authors: Bhandari Ramesh
Published: January 2021

We demonstrate the correctness of the recently derived analytic expression for the polarization-induced orbital angular momentum field in a multilayered fiber via numerical calculations of its contribution to polarization corrections.
Electrophysical Anisotropy of Periodic Surface Structures Induced by Femtosecond Laser on Amorphous Silicon
Authors: Shuleiko D.V. , Martyshov M.N. , Zabotnov S.V. , Presnov D.E. , Kazanskii A.G. , Kashkarov P.K.
Published: January 2021

Amorphous silicon films were modified by femtosecond laser pulses. Revealed on irradiated surface are micron-scale laser-induced periodic structures that affect anisotropy of dark conductivity, photoconductivity and carrier mobility within the film.
All-Bulk Chirp Control for Optical Parametric Amplifiers in the NIR Spectral Region
Authors: Archipovaite Giedre , Karras Gabriel
Published: January 2021

We present a novel approach of designing OPAs in the NIR, where all the pulse chirp is controlled in bulk materials. This has a potential to increase the robustness and simplicity of the system.
Longitudinal Radiation Force of Laser Pulses and Optics of Moving Neutral Particles
Authors: Kovachev Lubomir M.
Published: January 2021

Longitudinal radiation force proportional to the pulse energy and inversely proportional to its time duration is found. For femtosecond pulses propagating in gases the force is strong enough to confine particles into the pulse envelope.
Third optical harmonic generation reveals circular anisotropy in silicon nanowire arrays
Authors: Ustinov Alexey S. , Osminkina Lyubov A. , Golovan Leonid A.
Published: January 2021

Numerical simulations indicate difference in scattering of left- and right-handed circularly polarized waves in an array of silicon nanowires. Experiment demonstrates that such a structure despite its strong scattering possesses chiral cubic response.
Soft-x-ray transient absorption spectroscopy of sulfur hexaflouride in strong SWIR fields
Authors: Rupprecht Patrick , Aufleger Lennart , Magunia Alexander , Heinze Simon , Ding Thomas , Rebholz Marc , Amberg Stefano , Mollov Nikola , Henrich Felix , Haverkort Maurits , Ott Christian , Pfeifer Thomas
Published: January 2021

We report on experimental soft-x-ray transient absorption spectroscopy in SF6. The influences of strong SWIR fields and of vibrational dynamics initiated by impulsive stimulated Raman scattering on the

6

a

1
g

S
2

p

1
/
2
,
3
/
2

−
1

resonance are investigated.
Numerical Modeling of Dual Pump Amplifiers in Standard Silicon-on-Insulator Platform for Random Number Generation
Authors: Annavarapu Nirav , Catuneanu Mircea , Walther Paul , Razavi Mohsen , Franz Elke , Strufe Thorsten , Jamshidi Kambiz
Published: January 2021

The impulse response of a dual pump parametric process in silicon is numerically studied under different scenarios. Strong signal amplification can be seen (up to 30 mW) despite thermal detuning without active temperature stabilization.
7-8 μm range ring cavity quantum-cascade lasers with a surface emission
Authors: Babichev A.V. , Voznyuk G.V. , Andryushkin V.V. , Kolodeznyi E.S. , Gladyshev A.G. , Denisov D.V. , Dudelev V.V. , Kuritsyn D.I. , Mitrofanov M.I. , Slipchenko S.O. , Lyutetskii A.V. , Evtikhiev V.P. , Karachinsky L.Ya. , Novikov I.I. , Pikhtin N.A. , Sokolovskii G.S. , Morozov S.V. , Egorov A.Yu.
Published: January 2021

A ring cavity quantum-cascade laser with a surface emission through a grating for a frequency of 1.3 THz formed by ion beam milling is manufactured and studied.
Ultra Dense Demultiplexer Using Lattice Filters for WDM Applications
Authors: Lucia Felipe Lorenzo Della , Bustamante Yesica Raquel
Published: January 2021

In this paper we present the design and optimization of demultiplexer lattice filters with very short channels spacing of 0.5 nm and 0.4 nm for two and four channels respectively.
Selective TM Mode Coupling based on Asymmetric Silicon Slot Waveguide for High-performance TM-pass Polarizers
Authors: Dhingra Nikhil , Dell’Olio Francesco
Published: January 2021

We present the design of an asymmetric slot waveguide to facilitate selective TM mode coupling from a strip waveguide as basic building block of a TM-pass polarizer with record IL of 0.05 dB @ 1.55 μm.
Incubation Effect Study of GaN Films with Different Femtosecond Pulses Wavelengths
Authors: Nolasco L. K. , Mendonça C. R.
Published: January 2021

GaN is one of today’s most relevant materials in optoelectronics. This work is aimed at studying its incubation effect upon femtosecond laser micromachining, fundamental for the development of applications.
Characterization of fixed histological samples by means of digital holographic microscopy
Authors: Zhikhoreva A.A. , Belashov A.V.
Published: January 2021

In this paper we present our methodology for characterization of fixed histological samples using digital holographic microscopy. In contrast with typical workflows utilized for investigation of in vitro cultivated living cells, our approach doesn’t require segmentation of individual cells on phase images, which allows one to process phase images obtained from thick histological samples. The method was validated and demonstrated on several types of histological samples.
Integral Analysis to Detect of Type 2 Diabetes Using Biomarkers and Raman Spectroscopy.
Authors: Osorio N. Vázquez , Gutiérrez-Delgado F. , González-Viveros N. , Villalba-Hernández C. , Narea-Jiménez F. , Flores-Guerrero JL , Castro-Ramos J.
Published: January 2021

Diabetic, non-diabetic patients and Raman spectra body parts analyzed to detect glycosylated hemoglobin. Saliva and urine correlated biomarkers diabetes to determine kidney damage; Raman signal and SVM classified diabetic and non-diabetic patients.
Photonic discrete-time quantum walks using spatial light modulators
Authors: Puentes Graciana , Neves Leonardo
Published: January 2021

We report a novel scheme for photonic discrete-time quantum walks, using transverse spatial modes of photons and programmable spatial light modulators (SLM). Our scheme enables simulation of arbitrary steps, only limited by the SLM resolution.
Smooth Writing In YAG Single Crystal with Beam Waist of an Elliptical Cross-Section
Authors: Fedotov Sergey S. , Okhrimchuk Andrey G.
Published: January 2021

We demonstrate that direct laser writing of waveguides with a beam waist of elliptical cross section and the large ellipse diameter oriented along waveguide is beneficial in comparison with writing by a traditional circle waist.
An Extremely Miniaturized and Highly-Efficient High-Pass Wavelength Plasmonic Filter at Near-Infrared
Authors: Ebadi Seyed Morteza , Örtegren Jonas
Published: January 2021

This letter describes design and numerical simulation of an extremely-compact and efficient high-pass plasmonic filter based on MIM waveguides. Numerical results shown that by tuning structural parameters, desired cut-off wavelengths can be chosen.
Spectral Characterization of Light Source using Photonic Crystal Cavity
Authors: Sharma Naresh , Kumar Govind , Vijaya R. , Gupta Shilpi
Published: January 2021

We demonstrate a technique to spectrally characterize an unknown light source using spatial filtering property of a photonic crystal cavity. The estimated center wavelength and linewidth of an LED match well with commercial spectrometer measurements.
Auto-phase-locked Time-gated Luminescence Detection System for Spectrally Resolved Luminescence Lifetime Detection
Authors: Deng Qisheng , Zhu Zece , Shu Xuewen
Published: January 2021

Spectrally resolved luminescence lifetime detection has a wide range of applications in optical physics and biological imaging, which can be achieved by the cheap and simple auto-phase-locked time-gated luminescence detection system quickly.
Quantifying Non-Markovian Spontaneous Emission Dynamics near a MoS2 Nanodisk
Authors: Thanopulos Ioannis , Blekos Kostas , Kalozoumis Panayotis , Paspalakis Emmanuel
Published: January 2021

We study the spontaneous emission dynamics of a quantum emitter near a MoS2 nanodisk and go beyond analyzing the reversible population dynamics of the excited state by quantifying the non-Markovian behavior using different non-Markovianity measures.
Realization of strong far-field two-photon correlation in a transverse degree of freedom
Authors: Bhattacharjee Abhinandan , Joshi Mritunjay Kumar , Leach Jonathan , Jha Anand K
Published: January 2021

We report that, in contrast to position correlation, angle correlation of the photon pair produced by parametric down-conversion remains strong in the far-field, resulting in EPR-correlation in a transverse degree-of-freedom even in the far-field.
Photoluminescence and Up-Conversion in CdSe and CdSe/ZnS Quantum Dots in Amorphous and Liquid-Crystal Polymer Matrices
Authors: Golovan Leonid A. , Elopov Alexander V. , Zaitsev Vladimir B. , Ezhov Alexander A. , Zabotnov Stanislav V. , Zhigunov Denis M. , Karpov Oleg N. , Shandryuk Georgiy A. , Merekalov Alexey S. , Talroze Raisa V.
Published: January 2021

We report on effects of the matrix on photoluminescence spectra and lifetime and efficiency of up-conversion of core-type CdSe and core/shell CdSe/ZnS quantum dots embedded into smectic and amorphous polymers.
Direct observation of topological charge of single photon using a tilted-lens commonly used for classical vortex beams
Authors: Kumar Vimlesh , Sharma Varun , Singh Sandeep , Samanta G. K.
Published: January 2021

We report on the direct measurement of topological charge of single photon generated through the down-conversion of vortex pump beam using a tilted lens and coincidence detection based on intensified charge coupled device.
Crosstalk Reduction for a Graded-index Six-mode Fiber
Authors: Zhao Tianfeng , Zhang Peng , Wen Feng , Wu Baojian , Qiu Kun
Published: January 2021

We build the bridge between the fiber parameters and the mode-coupling crosstalk for a graded-index six-mode fiber. Simulations show that -40dB crosstalk-level can be achieved through small core size, refractive-index value and core eccentricity.
A Specialty Endless-Core Photonic Bandgap Fiber with Ultra-wide Bandwidth for Short Pulse Propagation
Authors: Biswas Piyali , Ghosh Somnath
Published: January 2021

We present a novel fiber design concept based on the formation of concentric effective optical cores in a photonic bandgap geometry supporting ultra-large bandwidth for stable propagation of short optical pulses over longer distances.
Demonstration of Sub-Nyquist Photonic Sampled Analog-to-Digital Converter for S-band RADAR Systems
Authors: Singh Karamdeep , Sreeraj S J , Sai Vikas T R , Kumar Krishna , Venkitesh Deepa
Published: January 2021

A packaged sub-Nyquist sampled photonic analog-to-digital converter (PADC) is demonstrated with a bandwidth of 42.3 MHz for S-band operation. Linear operation over 50 dB is demonstrated with a sensitivity of -70 dBm.
Large and Complex Chromatic Dispersion Profile in Epsilon-Near-Zero Aluminum-Doped Zinc Oxide
Authors: Wu Jiaye , Xie Ze Tao , Sha Yanhua , Fu H. Y. , Li Qian
Published: January 2021

We demonstrate the large and complex chromatic dispersion profile in epsilon-near-zero aluminum-doped zinc oxide. Results show very large and rapidly varying dispersion profile, and reveal its unsuitability for dispersion compensation devices.
Effective magnetic flux induced localization effect on the Lieb-type lattice in synthetic space
Authors: Yu Danying , Yuan Luqi , Chen Xianfeng
Published: January 2021

With ring resonators, we use effective magnetic flux to achieve the separation between flatband and dispersive bands in synthetic space. We show the localization effect of wavepacket by artificially manipulating the movement of optical wavepacket.
High repetition rate ultrashort pulse train generation in the tapered silicon ridge waveguide
Authors: Ye Feng , Li Qian
Published: January 2021

We numerically demonstrate the generation of a high-repetition-rate ultrashort pulse train in a 5-cm-long tapered silicon waveguide. Pulse width of a single pulse in the pulse train is compressed from 1.5625 ps to 102.4 fs.
Non-contact detection of underwater objects through the laser-induced acoustic source
Authors: Yellaiah J. , Kiran P. Prem
Published: January 2021

The time-frequency analysis of acoustic signals from nanosecond laser-induced breakdown of water revealed a broad spectrum. Impedance mismatch due to an object and water-air interface modified the reflected spectrum leading to non-contact detection.
Detection of crack in plywood using digital holography interferometry
Authors: Pensia Lavlesh , Dwivedi Gaurav , Kumar Raj
Published: January 2021

The application of digital holography in non-destructive testing of plywood is presented. Double exposure digital holographic interferometry is applied on plywood for detection of defects. 2-D and 3-D profiles of defects are presented and discussed.
High-Speed Detection of Directional Scattering for Nanolocalization
Authors: Beck Paul , Neugebauer Martin , Banzer Peter
Published: January 2021

We present a nanoparticle localization method based on the ultrafast detection of directionally scattered light with a high-bandwidth quadrant photodetector. We experimentally reach a temporal resolution of 8kHz and a spatial resolution of 1.1nm.
Sampling of Wavefront Aberrations using a Digital Micromirror Device
Authors: Thomas Daniya , Martins Alessandra Carmichael , Vohnsen Brian
Published: January 2021

We have recently introduced a digital micromirror device for optical wavefront sensing with high dynamic range and flexibility. Here, we report on the wavefront reconstruction accuracy in different scenarios and for sensing of ocular aberrations.
Stripe artifacts reduction in a light sheet fluorescence microscopy using a micro-lens array
Authors: Ryu Inkeon , Kim Daekeun
Published: January 2021

When light sheet fluorescence microscopy (LSFM) acquires an image for a biological specimen, image quality deteriorates due to shadow-like stripe artifacts. To resolve image degradation, we succeeded in effectively reducing stripe artifact by using multiple beams formed by a micro-lens array.
Polarimetric Evaluation of Bulk Samples and Unstained Sections of Colon Tissue
Authors: Sharma Mahima , Balasubramanian Subalakshmi , Sundaram Sandhya , Unni Sujatha Narayanan
Published: January 2021

The capability of Mueller polarimetry in enhancing contrast finds applications in biomedical diagnosis. In this study, we explore this technique in evaluating bulk specimens and unstained sections of colon tissue for improving diagnostic efficiency.
Label free whispering gallery mode-based aptasensor for CRP detection
Authors: Zhao Yuanfang , Chen Zhenmin , Dai Maolin , Fu H. Y.
Published: January 2021

A C-reactive protein (CRP) detection by aptasensor based on whispering gallery mode (WGM) is presented. Combined with microbubble resonator, the CRP aptamer is applied onto the microbubble to provide the specific recognition and detection for CRP.
Mobile Phone-based Platelet Function Analysis by Speckle Size Measurement
Authors: Jeon Hee-Jae
Published: January 2021

Bleeding disorder related to platelet number and functionality is a key issue before conducting surgery and monitoring the patient’s condition; therefore, reduction in the platelet number or disorder in their function cause bleeding risk. In this study, we introduce an optical evaluation method of platelet aggregation within a channel in a microfluidic chip by measuring the laser speckle size, which is related to the retarded blood flow in the microfluidic channel. With a whole blood sample, the speckle size was 28.54 ± 0.72 µm, and this is due to the aggregation of platelets. On the other hand, after removing the platelets from the blood, we found that the speckle size was significantly reduced to 27.04 ± 1.23 um. Also, by adding agonist containing ADP that can activate the platelets, the difference in speckle size was further increased to 32.89 ± 1.69 um. These findings may provide a simple optical technique with microfluidics to test the function of platelets in the diagnosis of bleeding disorders and may help monitor anti-platelet therapies.
ISCOSA UV-C Illumination Chamber for SARS-CoV-2 Decontamination
Authors: Ghosh Sumit
Published: January 2021

Ultraviolet Germicidal Irradiation (UVGI) is a reliable and frequently used method to decontaminate objects. ISCOSA participated in a OSAF grant program for development of a UVC decontamination chamber to support healthcare workers in our communities.
Multitrack Adaptive Compressive Hyperspectral Imaging for Cell Monitoring Applications
Authors: Kubal Sharvaj , Lee Elizabeth , Tay Chor Yong , Yong Derrick
Published: January 2021

We developed a hyperspectral imaging method that multiplexes measurements for adaptive compressive sensing, shortening imaging times by 10x. We simulate its application in cell monitoring, where short exposure and rapid processing are essential.
Pixel-Wise Calibration of the Spatial Light Modulator
Authors: Veronica Cazac , Elena Achimova , Katkovnik Vladimir , Shevkunov Igor , Egiazarian Karen
Published: January 2021

A digital holographic approach is used for calibrating the phase modulation in every pixel of the spatial light modulator (SLM). The phase reconstruction method involves a variational algorithm based on the local least square technique.
Investigation of Temporal Dynamics Leading to Self Mode-locking in Tm3+ Doped Fiber Ring Lasers
Authors: Basak Rajat Kumar , Anjali P.S. , Kaviya D. , Srivastava Manas , Srinivasan Balaji , Venkitesh Deepa
Published: January 2021

We experimentally study the time-dynamics of passive self-mode locking phenomena in a Thulium-doped fiber ring laser operating at ∼ 1976 nm wavelength pumped with 1550 nm.
Photon statistics in parametric down-conversion process
Authors: Meher Nilakantha , Jha Anand K.
Published: January 2021

Using the zero time-delay second-order correlation function, we investigate how the photon statistics of the field-modes generated by parametric down-conversion (PDC) process depends on photon statistics of the pump field-mode.
Doppler red-shifting as a source of intense mid-infrared pulses in relativistic laser plasma interaction
Authors: Korzhimanov Artem V. , Mikheytsev Nikita A.
Published: January 2021

We show that in back-reflection of an ultra-intense laser radiation from a near-critical density plasma with a sharp edge a generation of few-cycles mid-infrared pulses with relativistic intensities is feasible.
Thin-rod and thin-tapered-rod Yb:YAG laser amplifiers with high average power and pulse energy
Authors: Kuznetsov Ivan , Chizhov Sergey , Mukhin Ivan , Palashov Oleg
Published: January 2021

8mJ pulse energy is achieved in the thin-rod Yb:YAG laser amplifier at 1.5kHz repetition rate that is more than 3 times surpasses the previous record. Using thin tapered rods for further energy scaling is proposed.
One way quantum bit commitment using classical correlation and its implementation in IBM Q experience
Authors: Varghese Anoop , Behera Bikash K. , E. Sriram Prasath , Panigrahi Prasanta K.
Published: January 2021

Here, we develop a one way partial quantum bit commitment protocol using the states with built-in classical correlation, which are completely independent of entanglement. A procedure to enhance the security of the protocol is explicated.
Modal dynamics around a fourth-order exceptional point in a planar optical waveguide
Authors: Dey Sibnath , Laha Arnab , Ghosh Somnath
Published: January 2021

We report a planar few-mode supported optical waveguide with a multilayer length-dependent gain-loss profile to host a dynamical encirclement scheme around a fourth-order exceptional point (EP4) and explore a chirality-driven higher-order asymmetric mode conversion scheme.
Inverse Design of Ultra-broadband and Ultra-compact Polarization Beam Splitter via B-spline Surface
Authors: Mao Simei , Cheng Lirong , Wu Sailong , Mu Xin , Xin Tu , Fu H. Y.
Published: January 2021

We optimized a polarization beam splitter via B-spline surface through inverse design. It has low insertion loss (<0.4 dB) and low crosstalk (<14 dB) over 420-nm bandwidth with 2.8×2.4 μm2 footprint.
Optimization of Slot Waveguide Modulator Based on Epsilon-Near-Zero Effect
Authors: Sha Yanhua , Wu Jiaye , Xie Ze Tao , Li Qian
Published: January 2021

Multi-slot electro-optic waveguide modulators based on carrier-induced epsilon-near-zero effect are theoretically investigated. The extinction ratio of the tri-slot modulator is 1.02 dB/ μm, which is higher than the single- and dual-slot modulators.
Optical Design and Analysis of Ultralight, Large Aperture Transmissive Lenses for Space Telescopes
Authors: Kim Youngsik , Wang Zichan , Milster Tom
Published: January 2021

Ultralight, large aperture transmissive lenses for space telescopes which consists of multi-order diffractive engineered (MODE) surface lenses have high aspect ratio, low stray light and can be segmented for a large space telescope using arrays.
Novel Computational Imaging Approach for Compact Earth Imaging Telescopes for Space based Remote Sensing Applications
Authors: Sharma Shruti , Vasishtha Daksh
Published: January 2021

Novel Wavefront Coded Diffractive Lenses is proposed to make Compact Satellite based Earth imaging Cameras for broadband high resolution achromatic imaging. Combination of Hermite polynomial phase masks and Deep learning based post processing is reported.
Closed Loop Multi Conjugated Adaptive Optics in Microscopy with no Wavefront Sensor using Deformable Lenses
Authors: Furieri Tommaso , Bonora Stefano
Published: January 2021

We present a new microscopy method capable of measuring aberrations in every point of the sample and correct for the field-dependent aberrations in a closed loop MCAO system using two deformable lenses and no WFS.
Ultra-bright Source of Indistinguishable Single Photons
Authors: Javadi A. , Tomm N. , Antoniadis N. O. , Najer D. , Löbl M. C. , Korsch A. , Schott R. , Valentin S. R. , Wieck A. D. , Ludwig A. , Warburton R. J.
Published: January 2021

We demonstrate an ultra-bright source of coherent single photons with an average end-to-end efficiency of 55%. By the virtue of our record efficiency, a 20-photon quantum protocol will run seven orders of magnitude faster than the state-of-the-art.
Contact lens fitting through assessment of tear film affectation with different designs by means of thermal camera
Authors: Durán-Prieto E. , López-Alonso J.M.
Published: January 2021

The study of contact lenses fitting of different designs through the impact on the tear through infrared images of the eye has been carried out. Multifocal lens design behaves as well as traditional ones.
Optimization and validation of biomedical retinal images for fractal vascular measurement
Authors: Igalla A. , López-Alonso J.M.
Published: January 2021

The influence of the contrast and morphological filtering in the measurement of the local and connected fractal dimension of retinal images has been studied, being greater in morphological filter and fractal connected dimension.
Comparison and evaluation of local and connected fractal dimension to analyze the retinal images
Authors: Igalla A. , López-Alonso J.M.
Published: January 2021

The analysis of the fractal dimension (FD) of the retinas using the methods for measuring local (LFD) and connected (Dlc) DF in images of healthy retinas establishes a similar behavior with slightly differences.
Properties of resonant photonic lattices at the lattice-particle Mie scattering wavelength
Authors: Razmjooei Nasrin , Magnusson Robert
Published: January 2021

We address differentiation of Mie resonance and guided-mode resonance in mediating perfect reflection by periodic particle assemblies. With clear examples, Mie scattering is precluded as the operative effect.
Empirical Model for Estimating Light Pipe Sidewall Scattering Loss
Authors: Madsen C.K. , Hu C.
Published: January 2021

Using a geometric optics approximation for simulations and RMS slope for surface characterization, an empirical model is demonstrated that can then be used to estimate sidewall scattering loss for a range of waveguide parameters.
Coupling Silicon Vacancies in Diamond to a Silica Microsphere Optical Resonator
Authors: Pauls Abigail , Lekavicius Ignas , Wang Hailin
Published: January 2021

We report the development of a composite system for cavity QED studies of silicon vacancies in diamond utilizing an ultra thin diamond membrane coupled to a silica microsphere optical resonator with <40 MHz cavity linewidths.
Broadband Third-Order Frequency Downconversion in Dual-Core Fibers via CLPM
Authors: Su Jing , Biaggio Ivan
Published: January 2021

Coupling Length Phase Matching (CLPM) enables the generation of mid-infrared radiation using four-wave mixing and the third-order nonlinear optical properties of glass in otherwise unstructured, appropriately designed dual-core optical fibers.
Numerical model for ultrashort pulse pump-probe experiment in aluminum-doped zinc oxide multilayered metamaterial
Authors: Kelly Priscilla , Kuznetsova Lyuba
Published: January 2021

Numerical results, using the auxiliary differential equation FDTD method, show that presence of pump pulses (100-500 fs) with various amplitudes results in the dramatic change of probe pulse shape and amplitude in AZO/ZnO metamaterial.
Multiplatform Study of Four Wave Mixing For Quantum Frequency Comb Generation
Authors: Bruno Natalia , Gabbrielli Tecla , Cappelli Francesco , Corrias Nicola , Mastroserio Ivana , Lombardi Pietro , Cataliotti Francesco , De Natale Paolo , Zavatta Alessandro
Published: January 2021

We are developing an atom-based platform for investigating the non-classical nature of mid infrared light emitted by Quantum Cascade Laser frequency combs, based on four wave mixing 87Rb.
Collision Dynamics of Solitons in a Coupled Nonuniform Fiber Bragg Gratings with Cubic-Quintic Nonlinearity
Authors: Akter Afroja , Atai Javid
Published: January 2021

Collision dynamics of two counterpropagating moving Bragg grating solitons in two linearly coupled fiber Bragg gratings where both cores have cubic-quintic nonlinearity and dispersive reflectivity are investigated.
Mobile Oral Cancer Image Classification based on Efficient Deep Learning for Low-resource Settings
Authors: Song Bofan , Sunny Sumsum , Li Shaobai , Keerthi G , Patrick Sanjana , Mukhia Nirza , Gurudath Shubha , Raghavan Subhashini , Mendonca Pramila , Tsusennaro  , Leivon Shirley T , Kolur Trupti , Shetty Vivek , R Vidya Bushan , Ramesh Rohan , Pillai Vijay , Sigamani Alben , Suresh Amritha , Kuriakose moni Abraham , Birur Praveen , Liang Rongguang
Published: January 2021

We will report a mobile-based dual-mode image classification method for oral cancer detection in low-resource settings.
Refractive index sensor using hollow core anti resonance fiber
Authors: Mishra Satyendra K. , Azad Saeed , Mac-Thiong Jean-Marc , Ung Bora
Published: January 2021

In this study we demonstrate theoretically as well as experimentally refractive index sensing using hollow core anti resonance fiber. The sensor measures resonance wavelength shift with respect to the change in the analyte refractive index.
Fiber Bragg grating based spectroscopic investigations of spinal cord injuries
Authors: Mishra Satyendra K. , Mac-Thiong Jean-Marc , Wagnac Éric , Ung Bora
Published: January 2021

In this study we propose a fiber Bragg grating based sensing probe that provides a highly sensitive strain measurement with cm-scale axial resolution inside a surrogate spinal cord. The study is relevant to in vitro studies of spinal cord injuries.
Prism based all-optical de-multiplexer for spatially multiplexed communications channels
Authors: Harish Swaroopini , Wang Han , Sabnis Abhishek , Alnakhli Ali , Murshid Syed H.
Published: January 2021

Simulated results for an all-optical de-multiplexer that separates two spatially multiplexed optical channels is presented using Zemax. The design minimizes system power losses and optimizes the output.
Structural Anharmonicity: A New Outlook into the Vibrational Frequency Shifts of a Hydrogen-Bonded Antiferroelectric Material
Authors: Lavan Sydney N. , Saraza Cathleen A. , Bhullar Kanwar , Sabeyo-Yonta Sardou , Sanni Adedayo M. , Rury Aaron S.
Published: January 2021

Antiferroelectric materials provide great promise in energy storage applications. We established anharmonic contributions explain the vibrational peak shifts and do not correspond to any changes in the electrostatics of TFMBI.
Direct Laser Written Waveguide in YAG:Cr4+ Single Crystal with Low Propagation Loss and Low Depolarization Effect
Authors: Likhov V. , Alagashev G. , Lipatiev A. , Fedotov S. , Okhrimchuk A. , Gladyshev A.
Published: January 2021

Single mode waveguide with propagation loss lower than 1 dB/cm in the spectral region of YAG:Cr4+ amplification was manufactured. Detrimental change of polarization state was found to be minimized by proper choice of inscription parameters.
Interactions of Bragg Solitons in a Dual-Core System with a Uniform Bragg Grating and a Bragg Grating with Dispersive Reflectivity
Authors: Hossain Bellal , Atai Javid
Published: January 2021

The interactions of solitons in a dual-core system with a uniform and a nonuniform grating in Kerr nonlinear medium are investigated. The effect of the system param-eters on the interaction outcomes is analyzed.
Wavefront Shaping of Ultrashort Laser Pulses with Composite Few-Mode Optical Fiber Structure
Authors: Guang Zhe , Zhu Ping , Zhang Yani
Published: January 2021

We present mechanism and a device based on few-mode fiber to shape ultrashort laser pulses using multimode interference. Due to intermodal delay and dispersion, spatiotemporal complexity of modes offers novel tunability to shape transmitted pulses.
Multi-Wavelengths Speckle Images
Authors: Buffarini L. , Rabal H. J. , Cap N. L. , Grumel E.E. , Tebaldi M. , Trivi M.
Published: January 2021

We present adaptive algorithms for speckle dynamic images with light of different wavelengths. We carried out an experiment to test this approach, namely reading hidden drawing under paper and papyrus.
Feasibility of translation with picometer-accurate linearity supported by an optical bottle microresonator
Authors: Sumetsky M.
Published: January 2021

We design an optical bottle microresonator having a predetermined axial profile of its whispering gallery eigenmode and show that a linear eigenmode profile can support translation over tens of microns distance with picometer-accurate linearity.
Enhanced Harmonic Generation in Transition-Metal-Dichalcogenide (TMD) Metasurfaces
Authors: Nauman Mudassar , Yan Jingshi , Rahmani Mohsen , de Ceglia Domenico , De Angelis Costantino , Ma Wendi , Kamali Khosro Zangeneh , Miroshnichenko Andrey E. , Lu Yuerui , Neshev Dragomir N.
Published: January 2021

We demonstrate enhanced second-harmonic (SH) generation from a single-crystal TMD metasurface of high refractive index. By manipulating the Mie-resonances at the SH wavelength, we show the control of intensity and radiation of the SH signal.
Linear and Nonlinear Focusing Using Reconfigurable All-Dielectric Metalens Based on Phase-Change Materials
Authors: Zhu Muliang , Abdollahramezani Sajjad , Hemmatyar Omid , Adibi Ali
Published: January 2021

We numerically demonstrate a dynamically tunable all-dielectric metalens based on low-loss optical phase-change chalcogenide antimony sulfide (Sb2S3) to co-focus fundamental and third-harmonic generation (THG) signals with high dynamic range.
Cryogenic Optical Transitions Of 77Se+ Deep Donors In Silicon Photonic Crystal Cavity Platforms
Authors: Sarihan Murat Can , Liu Wei , Huang Jiahui , Tang Ke , McMillan James F. , Goorsky Mark S. , Jiang Hong-Wen , Pomeroy Joshua M. , Wong Chee Wei
Published: January 2021

We aim to develop a spin-photon interface to control long-living Se deep donor qubits. As a first step, we examine their mid-infrared transition under weak and strong coupled regime using a photonic crystal cavity.
Polarization-Induced Orbital Angular Momentum Field in a Multilayered Fiber
Authors: Bhandari Ramesh
Published: January 2021

We theoretically examine the vector orbital angular momentum (OAM) mode in a multilayered fiber, and discover that the polarization-induced field component is a modified scalar OAM field with a shifted intensity pattern.
Scattering and three-dimensional imaging in surface topography measuring interference microscopy
Authors: Su Rong , Coupland Jeremy , Sheppard Colin , Leach Richard
Published: January 2021

Surface topography measuring interference microscopy is a three-dimensional (3D) imaging technique that provides quantitative analysis of industrial and biomedical specimens. Many different instrument modalities and configurations exist, but they all share the same theoretical foundation. In this paper, we discuss a unified theoretical framework for 3D image (interferogram) formation in interference microscopy. We show how the scattered amplitude is linearly related to the surface topography according to the Born and the Kirchhoff approximations and highlight the main differences and similarities of each. With reference to the Ewald and McCutchen spheres, the relationship between the spatial frequencies that characterize the illuminating and scattered waves, and those that characterize the object, are defined and formulated as a 3D linear filtering process. It is shown that for the case of near planar surfaces, the 3D filtering process can be reduced to two dimensions under the small height approximation. However, the unified 3D framework provides significant additional insight into the scanning methods used in interference microscopy, effects such as interferometric defocus and ways to mitigate errors introduced by aberrations of the optical system. Furthermore, it is possible to include the nonlinear effects of multiple scattering into the generalized framework. Finally, we consider the inherent nonlinearities introduced when estimating surface topography from the recorded interferogram.
Numerical modelings of ultrashort pulse propagation and conical emission in multimode optical fibers
Authors: Tarnowski Karol , Majchrowska Sylwia , Béjot Pierre , Kibler Bertrand
Published: January 2021

We make use of two well-known numerical approaches of nonlinear pulse propagation, namely, the unidirectional pulse propagation equation and the multimode generalized nonlinear Schrödinger equation, to provide a detailed comparison of ultrashort pulse propagation and possible conical emission in the context of multimode optical fibers. We confirm the strong impact of the frequency dispersion of the nonlinear response on pulse splitting and supercontinuum dynamics in the femtosecond regime for pumping powers around the critical self-focusing threshold. Our results also confirm that the modal distribution of optical fibers provides a discretization of conical emission of the corresponding bulk medium (i.e., here fused silica). This study also provides some criteria for the use of numerical models, and it paves the way for future nonlinear experiments in commercially available optical fibers.