bluuebunny/crossref_metadata_2025 huggingface dataset:
Frequency Phase Response of a Live Ovarian Carcinoma Cell Seeded Quad AMC Leaky Metasensor
Authors: Saha Abhirupa
Published: November 2021

An 0.1-0.4THz AMC meta-sensor with live cells seeded, acting as a leaky-wave dielectric resonator is analyzed in a finite difference frequency domain. Ion-exchange through cell membrane interface forms a time-frozen material under test embedded in the computational space. The ovarian cells form an imperfect cavity on which TE mode waves get injected, their dispersive conductivity is validated to the production of surface plasmons for field enhancement. This knowledge was used to understand whether at all the SPP field confinement made the live cells more interactive to the irradiating field. A link between phase response and the induced electromagnetic visibility at mode matched frequencies is acquired by filtering out scattered fields from the surface of the detector with an improvement in sensitivity by a factor of 50.
Custom Fabrication of Video-rate Multiphoton Fluorescence Microendoscope for In Vivo Cancer Imaging
Authors: Zhang Kai , Mohan Arvind , Sharan Tarash , Ducourthial Guillaume , Spring Bryan Q.
Published: November 2021

We present a custom fabricated fiber scanning microendoscope with low-cost 3D-printed parts. The procedure of driving the piezotube-based fiber scanner and stability testing is shown. A novel scanning pattern to reduce photobleaching is also proposed.
A Modified Watershed Algorithm for Automated Segmentation of Autofluorescence Microscopy Images
Authors: Wang Nianchao , Hu Linghao , Webb Johanna , Walsh Alex J.
Published: November 2021

Segmentation of single cells within microscopy images is important for heterogeneity analysis. However, cell clumps are challenging for traditional methods. Here, we present a new watershed algorithm that separates cell clumps with high accuracy.
How random measurement errors propagate to the chromophore concentration calculation in broadband near-infrared spectroscopy
Authors: Truong Nghi Cong Dung , Shahdadian Sadra , Wang Xinlong , Liu Hanli
Published: November 2021

This study presented a theoretical analysis to quantify how random measurement errors affect the calculation accuracy of chromophore concentration changes using an error propagation matrix estimated from the least-squares fitting model.
Dependance of variance in estimation of hemoglobin concentration changes on system noise and two wavelengths chosen
Authors: Truong Nghi Cong Dung , Shahdadian Sadra , Wang Xinlong , Liu Hanli
Published: November 2021

Dependance of variance in calculated changes of hemoglobin concentrations was investigated using theoretical error propagation. Larger signal-to-noise ratios lead to smaller variance while selection of two wavelengths affects the variance as well.
Transcranial Photobiomodulation (tPBM) Recipients Present Information Flow Alterations in the Cortex: an eCONNECTOME Brain Space ROI Analysis
Authors: Pruitt Tyrell , Wang Xinlong , Wanirachichi Hashini , Liu Hanli
Published: November 2021

This study conducted a Granger-causality analysis using eCONNECTOME on tPBM-evoked EEG data taken from 19 human subjects. Results revealed significant alteration in information flow in the cortical source space by sham-controlled tPBM with 1064-nm laser.
Image Guided No Incision Laser Surgery Method and Apparatus by Multi-beam Interference
Authors: Liu Joyce
Published: November 2021

A novel method of image guided no incision laser surgery is created, using multi-beam constructive interference to form an internal laser scalpel and destructive interference to avoid injuring untargeted tissues, with feasibility analyzed theoretically.
Transcranial photobiomodulation with light emitting diodes increases vigilance performance and EEG alpha power of the human brain
Authors: Chaudhari Akhil , Wang Xinlong , Wu Anqi , Dmochowski Jacek P. , Liu Hanli
Published: November 2021

We investigated the effect of transcranial photobiomodulation induced by light emitting diodes by recording 64-chennel electroencephalogram in vivo. Compared to sham, subjects with tPBM showed an increase in vigilance and enhanced EEG alpha power.
Europium-doped-nanoparticle-based multiplexed lateral flow immunoassay for the quantitative and highly sensitive detection of enterotoxins
Authors: Mousseau F. , Feraudet-Tarisse C. , Simon S. , Gacoin T. , Bouzigues C. , Alexandrou A.
Published: November 2021

We developed a portable, fast, and highly sensitive in vitro assay for on-field biomolecule detection by combining the remarkable optical properties of lanthanide-doped nanoparticles with a simple homemade reader coupled to a smartphone.
Dual-Slope Optical Measurements of Cerebral Blood Flow and Autoregulation During Hypercapnia
Authors: Pham Thao , Blaney Giles , Sassaroli Angelo , Fernandez Cristianne , Fantini Sergio
Published: November 2021

We present a new dual-slope (DS) method for frequency-domain NIRS measurements of cerebral blood flow and autoregulation. Initial human measurements show the differential sensitivity of DS intensity and DS phase to cerebral hemodynamics during hypercapnia.
Confocal Bessel Beam Light-sheet and Expansion Microscopy for Axonal Connectomics of Mammalian Brains
Authors: Takasaki Kevin T. , Gao Ruixuan , Turschak Emily , Balaram Pooja , Edgren Arthur , Seshamani Sharmishtaa , Taormina Michael J. , Nicovich Philip R. , Reid R. Clay
Published: November 2021

We are applying light-sheet fluorescence microscopy with scanned Bessel beam illumination and confocal slit detection, combined with tissue expansion microscopy, to image dense axons over large brain volumes for axonal connectomics.
Implantable integrated photonic probe for light sheet brain imaging in vivo
Authors: Lin Nathan C. , Zhao Xuan , Hassan Sakib , Raghuram Ankit , Veeraraghavan Ashok , Robinson Jacob T.
Published: November 2021

We present implantable silicon photonic probes for selective plane illumination imaging in vivo. The small form factor of the probes minimizes tissue displacement and heat dissipation while providing planar illumination from within the tissue.
Quantitative Measurement of Static and Dynamic Tissue Optical Properties with Continuous Wave Pathlength Resolved Diffuse Correlation Spectroscopy
Authors: Safi Abdul Mohaimen , Moka Sadhu , Harrah Mitchell , Cini Stephen , Parthasarathy Ashwin B.
Published: November 2021

We demonstrate a new coherence gated Diffuse Correlation Spectroscopy (DCS) instrument for pathlength resolved measurement of flow, and tissue optical properties, using a continuous wave low coherence source and a Mach-Zehnder interferometer.
Near Field Optical Sensing of Single Cell Activity with Integrated Micro-Ring Resonators
Authors: Zhao Xuan , Fan Bo , Hassan Sakib , Veeraraghavan Ashok , Robinson Jacob T.
Published: November 2021

We propose a biohybrid sensor based on optical measurements of transmembrane proteins using micro-ring resonators. The scalability and sensitivity of this geometry could enable optical recording of many individual cells over large physical areas.
hNIR: a hyperspectral imaging system for mapping changes in haemoglobin and cytochrome-c-oxidase on the exposed cerebral cortex of mice
Authors: Giannoni Luca , Lange Frédéric , Sajic Marija , Smith Kenneth J. , Tachtsidis Ilias
Published: November 2021

We present a hyperspectral imaging system (hNIR), for mapping and quantifying in vi-vo dynamic changes in haemoglobin oxygenation and in the metabolic redox states of cytochrome-c-oxidase on the exposed cortex of mice during oxygenation challenges.
Analysis in the Broader, Medium, and Narrow Autism Phenotypes Using fNIRS
Authors: Rojas-Cisneros Michelle , Montero-Hernandez Samuel Antonio , Orihuela-Espina Felipe
Published: November 2021

Characterizing the brain activity of autistic phenotypes (AP) could inform an endophenotypic understanding of ASD. We present possibly the first study comparing brain responses in AP using fNIRS. Syllabic stress may unveil a potential biomarker.
Extended-Range 3D Localization Microscopy using the COSA Phase Mask
Authors: Carles Guillem
Published: November 2021

Precise 3D-localization of emitters over > 20× the depth-of-field of the microscope is possible using the COSA phase mask. Two localization algorithms that show a compromise between speed and precision are compared for different signal-to-noise levels.
Multi-sheet excitation and imaging of flow driven samples in an LSFM with a modified multi-focal diffractive lens
Authors: Hofmann Meike , Ghebjagh Shima Gharbi , Lemke Karen , Sinzinger Stefan
Published: November 2021

Five light sheets of equal intensity are generated within the tube of a flow driven Light Sheet Fluorescence Microscope (LSFM). In combination with a second multi-focal lens multiplane imaging on a single chip is provided.
On the Value of CTIS imagery for Neural Network Based Classification Experimental Results
Authors: Douarre Clément , Junior Carlos Crispim , Gelibert Anthony , Tougne Laure , Rousseau David
Published: November 2021

The computed tomography imaging spectrometer (CTIS) is a snapshot hyper-spectral imaging system which has recently been demonstrated of value when used in a compressed learning mode. In such a mode, the raw data are not reconstructed in an hyperspectral cube but are directly transmitted to a neural network to perform classification. While the previous investigations on this topic were limited to a simulation perspective, we extend these results to real images and demonstrate the possibility to train the network on simulated data and apply this trained model successfully on real images.
Two-step Deep Learning for Computational Imaging
Authors: Shang Ruibo , Hoffer-Hawlik Kevin , Wang Fei , Situ Guohai , Luke Geoffrey P.
Published: November 2021

A two-step deep learning approach is proposed for computational imaging. This approach is robust to image model mismatches since physics priors are not needed and mitigates over-parameterization by training the network in 2 steps.
Improving Compression Ratio in CASSI
Authors: Hlubuček J. , Lukeš J. , Žídek K.
Published: November 2021

We propose a new approach to improve the compression ratio in CASSI while maintaining the simplicity of the system and single-snapshot acquisition. We evaluate simulations of the modified method, which confirm the reconstruction quality improvement.
Compressive second-harmonic generation imaging
Authors: Kelkar Varun A. , Toussaint Kimani C.
Published: November 2021

We combine widefield second-harmonic generation imaging and phase-coded apertures with a Gerchberg-projected Wirtinger flow algorithm and regularized least-squares reconstruction for recovery of 3D volumes of collagen in a chicken tendon tissue.
Noise Robust Fourier Phase Retrieval with Complexity Guidance
Authors: Butola Mansi , Rajora Sunaina , Khare Kedar
Published: November 2021

Iterative phase retrieval from noisy Fourier intensity data poses several practical difficulties. We study the hybrid input-output solution using the concept of complexity guidance and describe a novel strategy for obtaining stable solutions.
Wide-field, illumination-agile, oximetric retinal imaging with a handheld camera
Authors: Carles Guillem , Preciado Miguel , Zammit Paul , Ochoa-Gutierrez Victor , Terry Joel , Cooper Jonathan M. , Reboud Julien , Harvey Andrew R
Published: November 2021

We report the first oximetric wide-field retinal imaging using a hand-held ophthalmoscope. Computational agile illumination yields a field of view of 80
◦
and spectral oximetric arterio-venous classification.
MultiWienerNet: Deep Learning for Fast Shift-Varying Deconvolution
Authors: Shuai Richard W. , Yanny Kyrollos , Monakhova Kristina , Waller Laura
Published: November 2021

We present a deep-learning method based on Wiener filters and U-Nets that performs image reconstruction in systems with spatially-varying aberrations. We train on simulated microscopy measurements and test on experimental data, demonstrating high resolution reconstructions.
Learning network for laser absorption imaging in flames using mid-fidelity simulations
Authors: Wei Chuyu , Schwarm Kevin K. , Pineda Daniel I. , Spearrin R. Mitchell
Published: November 2021

A deep neural network is trained using mid-fidelity reacting flow simulations to assist laser absorption imaging of species and temperature in flames with sparse view angles. The method is compared to linear tomography.
Single-Shot Beam Metrology via Ptychography
Authors: Barolak Jonathan , Goldberger David , Durfee Charles , Adams Daniel
Published: November 2021

We demonstrate a novel single-shot ptychographic imaging system based on diffractive splitting capable of simultaneous phase and amplitude beam metrology. We experimentally reconstruct vortex beams in both amplitude and phase from a single camera exposure.
Sparse X-ray hyperspectral tomography for nanoscopic compositional analysis of VPO catalysts
Authors: Gao Zirui , Odstrcil Michal , Böcklein Sebastian , Palagin Dennis , Holler Mirko , Sanchez Dario Ferreira , Krumeich Frank , Menzel Andreas , Stampanoni Marco , Mestl Gerhard , van Bokhoven Jeroen Anton , Guizar-Sicairos Manuel , Ihli Johannes
Published: November 2021

We introduced a novel X-ray measurement and reconstruction method that allows the acquisition of high-resolution hyperspectral tomograms. We applied it for compositional analysis of VPO catalysts which lead to a reevaluation of their working mechanisms.
Diffraction-limited Quantitative Phase Microscopy at peta-Hertz Rates
Authors: Haham Gil Ilan , Peleg Or , Loevsky Barry , Sidorenko Pavel , Cohen Oren
Published: November 2021

We propose and explore theoretically and experimentally a single-shot multi-frame quantitative phase microscope, based on measurement of coded diffraction patterns concurrently. The proposed method also enables ultrahigh-speed imaging, paving the way to ultrahigh-speed, diffraction-limited microscopy.
Cross-correlation interferometric synthetic aperture microscopy (CC-ISAM) for Fourier-domain OCT
Authors: Canales-Benavides Arturo A , Carney P Scott
Published: November 2021

CC-ISAM is a synthetic-phase modulation method in combination with an ISAM-based reconstruction algorithm that provides coherent noise-free, high resolution, 3D imaging to data acquired by means of Fourier domain optical coherence tomography (FD-OCT). Numerical results are presented.
Ptychography-based characterization of wavelength-tunable vortex beams
Authors: Pelekanidis Antonios , Loetgering Lars , Witte Stefan
Published: November 2021

We demonstrate monochromatic ptychographic reconstructions of vortex beams within a range of 0.2λ0. Modal decomposition of the vortices reveal that the pu-rity of the dominant LG01 mode exceeds 85% for the full investigated bandwidth.
Large-area, high-resolution optical anisotropy imaging with polarization-sensitive Fourier ptychoraphy
Authors: Song Seungri , Kim Jeongsoo , Hur Sunwoong , Song Jaewoo , Joo Chulmin
Published: November 2021

We present polarization-sensitive Fourier ptychographic microscopy (PS-FPM) capable of generating high-resolution birefringence images of optically anisotropic specimens with large field-of-view (FoV). FPM produces high-resolution complex object field of transparent samples over a large-FoV based on multiple intensity measurements acquired with various illumination angles and ptychographic iteration engine. We combine this attractive feature of FPM with single-input-state illumination and pixelated polarized camera to achieve imaging of both complex and birefringence information of transparent objects. Compared to conventional polarization imaging techniques, PS-FPM does not involve any mechanical rotation of polarizer/analyzer and achieves birefringence imaging with a half-pitch resolution of 0.55-μm over 3.78-mm2 FoV, which corresponds to the space-bandwidth product of 12.5 megapixels. We demonstrate high-resolution, large-area birefringence imaging capability of PS-FPM by presenting birefringence images of various anisotropic objects.
A Single scattering analysis of speckle correlation
Authors: Bar Chen , Alterman Marina , Gkioulekas Ioannis , Levin Anat
Published: November 2021

We propose a closed-form expression for memory effect speckle correla- tions, enriching our understanding of their unique properties. The model considers only the single-scattering component of light, yet offers a good approximation even in thicker volumes.
Correction to the deformation due to movement and 3D profile of particles in optical trapping
Authors: Otahola B. Cuevas , Hernández J. Arriaga , García R. Ramos , Oliveros J. Oliveros
Published: November 2021

We segment the images of particles moving in optical traps to recover their irradiance and deformation. We use Legendre polynomials to correct the deformation and retrieve the phase using the 3D profile of the particle.
Maximizing the Field of View in Blind Ptychography
Authors: Jenkins Nicholas W. , Tanksalvala Michael , Esashi Yuka , Zhang Zhe , Bevis Charles S. , Jacobs Matthew N. , Johnsen Peter , Liao Chen-Ting , Gerrity Michael , Kapteyn Henry C. , Murnane Margaret M.
Published: November 2021

An analysis of blind ptychography that provides predictions of error and the reconstructed field-of-view (FOV) is presented. The utility of this analysis is demonstrated with a new approach called dual-grid ptychography that maximizes the FOV.
ptyLab: a cross-platform inverse modeling toolbox for conventional and Fourier ptychography
Authors: Loetgering Lars , Aidukas Tomas , Du Mengqi , Flaes Dirk Boonzajer , Penagos Daniel , Rose Max , Pelekanidis Antonios , De Beurs Anne , Eschen Wilhelm , Hess Jürgen , Wilhein Thomas , Heintzmann Rainer , Rothhardt Jan , Witte Stefan
Published: November 2021

We present a cross-platform software, called ptyLab, enabling both conventional and Fourier ptychographic data analysis. The unified framework will accelerate cross- pollination between the two techniques. The code is available open-source in both MAT-LAB and Python.
Retrieving Interface Evolution from Refraction-Enhanced X-ray Radiograph with a Deep Neural Network
Authors: Jiang S. , Landen O. L. , Whitley H. D. , Hamel S. , London R. , Sterne P. , Clark D. S. , Hansen S. B. , Hu S. X. , Collins G.W. , Ping Y.
Published: November 2021

We have used refraction-enhanced X-ray radiography to study the evolution of a heated CH/Be interface on OMEGA laser. The density profile as a function of time was retrieved with an untrained deep neural network, which can be used to infer thermal conductivity near the interface.
Proton radiography of non-uniform initial magnetic fields in HED plasmas
Authors: Malko S. , Johnson C. , Schaeffer D. B. , Fox W. , Fiksel G. , Bhattacharjee A. , Spitkovsky A. , Knapp P. , Ciardi A. , Davies J.
Published: November 2021

We report a novel technique of proton radiography using an in-situ reference x-ray image of a mesh to precisely measure non-uniform magnetic fields in expanding plasmas.
Three-dimensional imaging through thick phase-fluctuating medium based on phase-shift digital holography with two adjacent light sources for common-path geometry
Authors: Kodama Shutaro , ohta Manami , Miyamoto Yoko , Osten Wolfgang , Takeda Mitsuo , Watanabe Eriko
Published: November 2021

We propose a method for three-dimensional imaging through a thick phase-fluctuating medium based on phase-shift digital holography with two adjacent point light sources for common-path geometry. Suppression of three-dimensional phase fluctuation was confirmed by numerical simulation and experiments.
Common-Path Optical Scanning Holography
Authors: Tsai Chen-Ming , Liu Jung-Ping
Published: November 2021

Optical scanning holography (OSH) relies on the scanning by using an interference fringe and thus is sensitive to the environmental fluctuation. Here we demonstrated the common-path OSH to suppress the influence of environmental fluctuation and minimize the system form factor.
Single Lens Wide Angle Holographic Projection with LED Illumination
Authors: Chlipala Maksymilian , Kozacki Tomasz
Published: November 2021

In this work we present compact single lens wide angle holographic display with LED illumination, which is capable of reconstructions of large size images. Obtained optical results illustrate high quality images at large depth.
Towards Holographic Flat Panel Displays
Authors: Lee Hong-Seok , Song Hoon , An Jungkwuen , Won Kanghee , Kim Young , Hong Jong-Young , Kim Yunhee , Choi Chil-Sung , Kim Hong Suk , Yu Hyeonseung , Hong Sunghoon , Morozov Alexander , Kim Kichul
Published: November 2021

I will introduce the details of our slim-panel holographic video display, and discuss the issues and directions to improve it towards holographic flat panel displays. © 2021 The Authors
Holographic Projection Three-dimensional Display with Enlarged Viewing Angle using Decentered Lens Group
Authors: Xie Taomin , Yang Guanglin , Xie Haiyan
Published: November 2021

A method of beam deflection using decentered lens group based on angle compensation is proposed to enlarge the viewing angle of three-dimensional (3D) image display for holographic projection, based on time-division multiplexing method. © 2021 The Author(s)
A modified constraint for iterative phase-only multiplane hologram generation
Authors: Velez-Zea Alejandro , Barrera-Ramírez John Fredy , Torroba Roberto
Published: November 2021

We introduce a modified hologram plane constraint to the global Gerchberg-Saxton algorithm for improved multiplane phase-only hologram generation. We demonstrate a 17% increase in the reconstruction quality compared with previously reported methods.
Stratified Diffractive Optical Elements for Azimuthal Multiplexing
Authors: Wang Haiyan , Piestun Rafael
Published: November 2021

We design and demonstrate stratified diffractive optical elements to achieve azimuthal multiplexing, a technique that enables recording multiple outputs that are switched upon the rotation of one or more layers by a certain angle.
Lossless Compression of Binary Holograms with Context Models and Adaptive Segmentation
Authors: Muhamad Raees Kizhakkumkara , Birnbaum Tobias , Blinder David , Schretter Colas , Schelkens Peter
Published: November 2021

We demonstrate how applying adaptive segmentation on context modelling schemes can be used for lossless compression of binary holograms. A tree-based scheme using Bayesian inference is introduced to improve the compression rate over fixed sized models.
Four-frame ultrafast radiography of a shocked sample at an x-ray free electron laser
Authors: Hodge Daniel , Pandolfi Silvia , Liu Yanwei , Li Kenan , Sakdinawat Anne , Seaberg Mathew , Hart Philip , Galtier Eric , Khaghani Dimitri , Vetter Sharon , Decker Franz-Joseph , Nagler Bob , Lee Hae J. , Bolme Cindy , Ramos Kyle , Kozlowski Pawel M. , Montgomery David S. , Carver Thomas , Dayton Mathew , Dresselhaus-Marais Leora , Ali Suzanne , Sandberg Richard L. , Gleason Arianna
Published: November 2021

With an ultrafast framing camera, we image the propagation of a shock wave on the nanosecond time-scale. Four frame x-ray phase-contrast radiographs are acquired using the pulse train from an x-ray free electron laser.
Large field of view digital holographic metrology for 3D analysis of mosquito flight behaviour
Authors: Hall Matthew L , Gleave Katherine , Hughes Angela , Facchinelli Luca , McCall Philip , Towers Catherine E , Towers David P
Published: November 2021

Digital holographic reconstruction of diffraction patterns recorded using large aperture parabolic mirrors in a Z-configuration provide accurate, highly detailed, video-rate 3D tracking of mosquito flight in a 250×250×1200mm chamber.
Visibility enhancement method of geometric-phase self-interference incoherent digital holography with residual bias noise
Authors: Choi Kihong , Hong Keehoon , Yeom Han-Ju , Park Joongki
Published: November 2021

The visibility of the reconstructed image degraded by the residual bias noise, obtained from the geometric-phase self-interference incoherent digital holography, can be enhanced applying the bias level shifting method to the complex hologram.
Computer-generated holograms: algorithms and related topics
Authors: Shimobaba Tomoyoshi , Kakue Takashi , Ito Tomoyoshi
Published: November 2021

In this tutorial, we present algorithms and related techniques for computer-generated holograms (CGHs), especially CGHs for display applications, including our per-spectives.
Efficient computation of ultra-high resolution mesh-based hologram with resolution adjustment of polygon
Authors: Yeom Han-Ju , Cheon Sanghoon , Park Joongki
Published: November 2021

An efficient computation method of ultra-high resolution mesh-based computer- generated hologram is proposed for accelerating the synthesis by arbitrarily adjusting the frequency domain resolution of the polygon while maintaining the quality.
Towards Remote Pixelless Displays
Authors: Akşit Kaan
Published: November 2021

Next generation displays have to resolve major design challenges for providing frictionless user experiences. To address these issues, we introduce two concepts named as “Beaming Displays” and “Patch Scanning Displays”.
Induced dehydration as a method to enhance phase-contrast observation of plant cells intracellular dynamics
Authors: Wang Zhe , Pirone Daniele , Bianco Vittorio , Memmolo Pasquale , Villone Massimiliano Maria , Maffettone Pier Luca , Ferraro Pietro
Published: November 2021

The loss of water content in plant cells results in the increasing of refractive index difference between organelles and background, thus allowing high contrast digital holographic observation of intracellular dynamics.
4D object tracking in lensless digital in-line holographic microscopy aided by dark-field based autofocusing metric
Authors: Trusiak Maciej , Rogalski Mikołaj , Winnik Julianna , Picazo-Bueno Jose Angel , Micó Vicente
Published: November 2021

Volumetric tracking of dynamic objects is vital in biomedical and technical sciences. Lensless digital in-line holographic microscopy offers unique setup compactness and high analysis throughput. We propose new automatic tracking algorithm driven by computational d ark-field based autofocusing metric. Method is validated in live sperm cell study.
Enhancement of single-shot lensless super-resolution phase imaging by preliminary observations
Authors: Kocsis Péter , Shevkunov Igor , Katkovnik Vladimir , Egiazarian Karen
Published: November 2021

Algorithm enhancements are proposed for single-shot phase retrieval to reduce loss from ill-conditioning. The approach is based on prior observations, improved diffrac- tion pattern up-sampling, and updated filters. High-quality super-resolved reconstructions are demonstrated in simulation.
Quantitative phase imaging at the nanoscale using interferometric microscope and thermo-optic effect
Authors: Robert Hadrien , Piliarik Marek
Published: November 2021

We developed a photothermal spatial light modulator featuring no grating artifact and no sensitivity to polarization. Combined with an interferometric microscope, we performed quantitative phase imaging and 3D tracking of nano-objects at the kHz framerate.
Raspberry PI Cluster System for Computer Generated Holography
Authors: Zhang Guangyu , Wang Youchao , Dong Daoming , Wilkinson Timothy
Published: November 2021

We present an embedded implementation using the Raspberry-Pi cluster system for One-Step Phase-Retrieval hologram generation. The results indicate a promising direction towards a lower cost and more compact embedded hologram generation system.
Holographic Foveated Rendering Effect with Multi-phase Spatial Light Modulator
Authors: Dong Daoming , Mouthaan Ralf , Wang Youchao , Kadis Andrew , Wilkinson Timothy D.
Published: November 2021

We present a method to create the holographic foveated rendering effect based on the iterative phase retrieval algorithm. We validated our proposing algorithm using an optical setup with a multi-phase spatial light modulator.
Diffraction limited perspective, numerical reconstruction of macroscopic DH
Authors: Birnbaum Tobias , Blinder David , Schelkens Peter
Published: November 2021

Modern holograms exceed resolutions of 2D and holographic displays. We propose to use phase space analysis to determine the intrinsic resolution of DHs and re- size perspective reconstructions accordingly, thus enabling for example accurate subjective tests.
Portable and Compact TDLAS Measurement System for Exhaust Gas Diagnostics at Real Driving Conditions
Authors: Wagner Steven , Biondo Luigi , Gerken Henrik , Steinhaus Tim , Illmann Lars , Beidl Christian
Published: November 2021

The fulfillment of quality and regulation requirements for thermo-chemical industrial processes rely on new measurement technologies based on laser-optical methods. Here we present a robust multi-channel, multi species measurements system for the quantification of exhaust gas species direct at the tail pipe end of a driving car. The application of the TDLAS-spectrometer as well as results of a syn-fuel test drive are presented and discussed in detail regarding optical system robustness and uncertainties.
Towards a Dual-Comb Spectrometer on a Photonic Chip
Authors: Picqué Nathalie
Published: November 2021

Dual-comb spectroscopy emerges as a powerful tool for laboratory and field spectroscopy. The progress toward ultra-miniaturized instruments using electro-optic modulators or semi-conductor mode-locked lasers on photonic chips will be illustrated and discussed.
Tailored on-chip mid-IR light generation and application for gas spectroscopy
Authors: Brès Camille-Sophie , Tagkoudi Eirini , Grassani Davide , Yang Fan
Published: November 2021

In this contribution, we present how coherent supercontinuum generation in Si3N4 waveguides enabled by fiber laser pumping can be tailored to cover part of the mid-IR spectrum and the use of such sources in spectroscopy. © 2021 The Author(s)
Performance Comparison of Fourier Transform and Grating-Based Spectrometers in Trace Gas Detection for Fruit Quality Monitoring
Authors: Jahromi K. Eslami , Nematollahi M. , Khodabakhsh A. , Krebbers R. , Abbas M. A. , Harren F. J. M.
Published: November 2021

We present a comparative study on the development and evaluation of a Fourier transform spectrometer and a grating-based spectrometer, both combined with mid-infrared supercontinuum sources and multi-pass absorption cells for multi-species trace gas sensing.
Photonic Integration for Low Size, Weight, and Power (SWaP) Remote Gas Spectroscopy
Authors: Rosborough Victoria , Fridlander Joseph , Sang Fengqiao , Gambini Fabrizio , Brunelli Simone Tommaso Šuran , Chen Jeffrey R. , Kawa Stephan , Numata Kenji , Stephen Mark , Coldren Larry , Klamkin Jonathan
Published: November 2021

Subsystem operation of a photonic integrated circuit for low size, weight, and power remote gas sensing was demonstrated. Precision lidar system specifications for laser tuning, photodiode bandwidth and pulse extinction ratio were satisfied. A twentyfold improvement in long-term laser frequency stability was achieved.
UAV-aided Localization and Quantification of Methane using CLaDS
Authors: Soskind Michael G. , Li Nathan P. , Moore Daniel P. , Wendt Lars , Chen Yifeng , McSpiritt James , Zondlo Mark , Wysocki Gerard
Published: November 2021

We present localization and quantitative concentration analysis of controlled methane releases using chirped laser dispersion spectroscopy (CLaDS) in conjunction with an unmanned aerial vehicle (UAV) in an open-path sensing configuration. The system was operational with gusts up to 10 m/s, at distances up to 40 meters, and without using jacks to mechanically stabilize of the instrument vehicle.
Compact QCL Absorption Spectrometer for Balloon-borne Water Vapor Measurements in the Upper Atmosphere
Authors: Graf Manuel , Brunamonti Simone , Peter Thomas , Emmenegger Lukas , Tuzson Béla
Published: November 2021

We present a lightweight mid-IR spectrometer for accurate measurements of the H2O concentration in the upper troposphere and lower stratosphere (UTLS) aboard meteorological balloons.
Identifying Phytoplankton Using Raman Spectroscopy
Authors: Novikova Nina I. , Matthews Hannah , Williams Isabelle , Sewell Mary A. , Nieuwoudt Michel , Simpson M. Cather , Broderick Neil G. R.
Published: November 2021

Vibrational signatures of three types of phytoplankton were measured using Raman spectroscopy. Characteristic shifts in pigment bands were identified as markers for phytoplankton viability while PCA of the full spectral profile allowed differentiation between phytoplankton.
An Airborne Coronal Emission Surveyor (ACES) for Solar Eclipse Observations
Authors: Samra Jenna , Cheimets Peter , DeLuca Edward , Madsen Chad , Marquez Vanessa
Published: November 2021

The Airborne Coronal Emission Surveyor (ACES) is a new imaging Fourier transform spectrometer (FTS) that will explore the large-scale coronal infrared (IR) emission spectrum during the April 8, 2024 total solar eclipse. ACES will fly along the path of totality on the NSF/NCAR Gulfstream V High-performance Instrumented Airborne Platform for Environmental Research (GV HIAPER) with a stabilized solar feed provided by the Airborne Stabilized Platform for InfraRed Experiments (ASPIRE). During the six-minute total eclipse, ACES will map emission line intensity in the 1–4 µm wavelength region over a 0.73
◦
× 0.55
◦
field of view (FOV).
Noise Reduced Multi-Pinhole Interferometry Based on Resonant Pindisks
Authors: Bläsi Johannes , Köpke Markus , Gerken Martina
Published: November 2021

Multi-pinhole interferometry is promising for low limit of detection biosensors. Structuring the optical transducer elements as pindisks, instead of using a pinhole aperture, results in a noise reduced and compact measurement system.
Sensing Angular Velocity with Optical Orbital Angular Momentum and Machine Learning
Authors: Strong Elizabeth F. , Anderson Alexander Q. , Heffernan Brendan M. , Brenner Michael P. , Hoghooghi Nazanin , Gopinath Juliet T. , Rieker Gregory B.
Published: November 2021

We demonstrate a technique for characterizing angular velocities of small particles using light with orbital angular momentum and a machine learning-based signal processing toolbox. We expect this technique will find applications in fluid mechanics.
EnMAP: THE GERMAN SPACEBORNE IMAGING SPECTROSCOPY MISSION
Authors: Schickling Anke , Chabrillat Sabine , Storch Tobias , Fischer Sebastian
Published: November 2021

The Environmental Mapping and Analysis Program (EnMAP) is a spaceborne German hyperspectral satellite mission that aims at monitoring and characterizing the Earth’s environment on a global scale. This paper presents an update of the mission status with developments from the space and the ground segment.
Hyperspectral image classification with minimum noise fraction, 2D spatial filtering and SVM
Authors: Qian Shen-En , Chen Guang Yi
Published: November 2021

A new hyperspectral image classification method is proposed. It uses minimum noise fraction to reduce the dimensionality of a hyperspectral data cube followed by 2D spatial filtering and support vector machine. Experimental results show that the proposed method outperforms or is competitive to existing methods.
Complex Optical Switching in a Ring Resonator with Counter Propagating Light
Authors: Bitha Rodrigues D. D. , Giraldo Andrus , Broderick Neil G. R. , Krauskopf Bernd
Published: November 2021

We show that regular and complex self-switching oscillations arise in a ring resonator with balanced bi-directional pumping, when two asymmetric attractors merge. Our results provides a road map of optical switching for experimental studies.
Photonic Tensor Core and Nonvolatile Memory for Machine Intelligence
Authors: Sorger Volker J.
Published: November 2021

Here, I review our latest work on a Photonic TPU (P-TPU), a PIC-based ASIC for vector matrix multiplication acceleration and introduce a programmable multi-level non-volatile photonic random access memory (P-RAM).
High Precision Diamond-on-GaN Photonic Thermometry Enabled by Transfer Printing Integration
Authors: Smith J. A. , Hill Paul , Klitis Charalambos , Sorel Marc , Postigo P. A. , Weituschat Lukas , Dawson M. D. , Strain M. J.
Published: November 2021

We demonstrate a hybrid photonic thermometer, integrating two wide-bandgap materials (diamond and GaN) by transfer printing. Temperature errors as low as 9.2 mK are reported – a nearly fivefold improvement over current state of the art.
Demonstration of a Silicon Photonic Transmitter for Space Division Multiplexing in MMFs
Authors: Chugh Shivangi , Gupta Shalabh
Published: November 2021

We propose a photonic integrated circuit based solution for space division multiplexing with random mode excitation in multi-mode fibers (MMFs). As a proof of concept, a three mode transmitter is experimentally demonstrated.
A Micro-Opto-Electro-Mechanical Grating 1D-OPA
Authors: Pruessner Marcel W. , Mahon Rita , Kozak Dmitry A. , Tyndall Nathan F. , Rabinovich William S. , Stievater Todd H.
Published: November 2021

We propose a 1D optical phased array (OPA) utilizing near-field micro-opto-electro- mechanical interaction to tune a waveguide grating’s diffraction angle. Simulations demonstrate steering angles >20 (material, geometry, wavelength, and polarization-dependent). Measurements validate the proposed OPA concept.
Transfer-printing enables multi-material assembly of integrated photonic systems
Authors: Jevtics Dimitars , Smith Jack A. , McPhilimy John , Guilhabert Benoit , Hill Paul , Klitis Charlambos , Sorel Marc , Hurtado Antonio , Dawson Martin D. , Strain Michael J.
Published: November 2021

Hybrid integration of photonic membrane and nanowire devices from multiple material platforms is demonstrated using high-accuracy transfer printing. The deterministic assembly technique enables serially printed devices with separations as low as 100 nm.
Heterogeneous quantum-dot microring photodetector on silicon
Authors: Tossoun Bassem , Liang Di , Beausoleil Raymond G.
Published: November 2021

We present the first heterogeneous quantum-dot (QD) microring photodetector on silicon. The photodetector demonstrates a responsivity of 0.2 A/W and a 30x increase in responsivity on resonance. Open eye diagrams are measured at 10 Gb/s.
Electro-optic Frequency Combs for Spectroscopic Applications
Authors: Parriaux Alexandre , Hammani Kamal , Millot Guy
Published: November 2021

We present the recent progresses on frequency combs generated with electro-optic intensity modulators for spectroscopic applications, and especially dual-comb spectroscopy in the near and mid-infrared.
CMOS-Compatible Silicon Nitride Waveguide on Silicon Photonics Platform
Authors: Maegami Yuriko , Okano Makoto , Cong Guangwei , Suzuki Keijiro , Ohno Morifumi , Narushima Toshihiro , Yokoyama Nobuyuki , Seki Miyoshi , Saitou Shigeru , Ohtsuka Minoru , Kawashima Hitoshi , Yamada Koji
Published: November 2021

We present applications of a CMOS-compatible SiN waveguide to an ultralow-loss fiber coupling structure and a Si-to-SiN waveguide on a Si photonics platform for C-band infrared light. We also evaluate waveguide properties for visible light.
Electrode Design for Slow-Light based Mach-Zehnder Modulator in Silicon Photonics
Authors: Mao Deng , Parvizi Mahdi , Alam Md Samiul , Abdo Ahmad , Ben-Hamida Naim , El-Fiky Eslam , Plant David V.
Published: November 2021

A comb-like delayed electrode design is proposed for a slow-light based Mach- Zehnder Modulator. The electro-optic bandwidth of the modulator is estimated considering optical and RF group indices, PN junction, and electrode design.
Tunable Hybrid Silicon-Fiber Laser at 2 µm
Authors: Vallée Jean-Michel , Jean Philippe , Guay Philippe , Fortin Vincent , Bernier Martin , Shi Wei
Published: November 2021

We demonstrate a tunable hybrid silicon-fiber r ing l aser a t 2 µ m. U sing a silicon photonic filter and a thulium-doped fiber amplifier, we achieved tuning over 100 nm, a maximum power of 28 mW, and a linewidth less than 260 kHz.
Advances in Bayesian optimization for photonics and quantum atom optics applications
Authors: Schneider Philipp-Immanuel , Garcia-Santiago Xavier , Wiegand Benjamin , Anton Oliver , Krutzik Markus , Rockstuhl Carsten , Burger Sven
Published: November 2021

Bayesian optimization is an efficient numerical tool. We review approaches to improve its scalability and to handle noisy inputs, and we demonstrate applications in pho- tonics design optimization and in control of quantum experiments.
A Thulium-Silicon Hybrid Microdisk Laser
Authors: Kiani Khadijeh Miarabbas , Frankis Henry C. , Naraine Cameron M. , Bonneville Dawson B. , Knights Andrew P. , Bradley Jonathan D. B.
Published: November 2021

In this work, we present on optical gain and lasing in an ultra-compact thulium-silicon hybrid microdisk resonator emits around 1.9 µm with an internal slope efficiency of 60% and > 1 mW on-chip output power.
Fabrication of Three-dimensional Photonic Crystal Using Lamb Waves
Authors: Chen Yen-Hsiang , Chen Yu-Bin
Published: November 2021

This work set up a Lamb wave excitation device for assembling polystyrene nanospheres into 3D photonic crystals (PCs) of face-centered cubic structures. The optical property of fabricated PCs was verified by transmittance spectra measurements.
Diffraction of Sunlight by Grating Optical Filters in Smart Windows
Authors: Zakirullin Rustam , Odenbakh Irina
Published: November 2021

Diffraction of sunlight in two-grating optical filters for smart windows is investigated. Calculation results show that the effect of diffraction on the directional light transmission of single- and double-glazed windows can be neglected.
A Tunable Plasmonic Wide Flat-Top Band-Pass Filter based on Trapezoid Resonator at Near-Infrared
Authors: Ebadi Seyed Morteza , Örtegren Jonas
Published: November 2021

A miniaturized and efficient tunable wide flat-top band-pass filter at NIR is proposed in a MIM plasmonic waveguide. Furthermore, numerical results illustrate that tunability is readily attained by varying length of right-angle trapezoid resonator.
Lanthanide doped Titania photoanodes for enhanced performance of Indoor light energy harvesting DSSC devices
Authors: Katta Venkata Seshaiah , Chappidi Vishnuvardhan Reddy , Raavi Sai Santhosh Kumar
Published: November 2021

Lanthanide doped TiO2 photoanodes were optimized and employed to enhance the DSSC performance in indoor-light illumination. We report efficiencies ≈ 9% for indoor conditions that are twice that measured under the solar simulator.
Lens Stars and Platonic Lenses: Connecting Transformation Optics and Kepler Problem
Authors: Bělín Jakub , Tyc Tomáš , Courtial Johannes
Published: November 2021

We present unusual lens combinations which can be applied as building blocks of transformation-optics devices as well as tools for optical simulations of the movement in a gravitational field.
Fast refractive index tomography of living cells in conventional microscope
Authors: Soto J. M. , Rodrigo J. A. , Alieva T.
Published: November 2021

We demonstrate the application of refractive index tomography technique compatible with conventional transmission microscope for fast (10 fps) 3D living cell monitoring. The reconstructed refractive index distribution allows studying dynamics of eukaryotic cell organelle in 3D.
Lock-In Amplified Differential Phase Contrast
Authors: Bonati Chiara , Loterie Damien , Laforest Timothé , Moser Christophe
Published: November 2021

A method for lock-in amplified differential phase contrast is described, which gives background-free, high contrast-to-noise ratio phase images. We show the advantages of this approach, and demonstrate its performance compared to standard DPC.
Spatial frequency domain imaging with a bucket detector
Authors: Lenz Armin J. M. , Clemente Pere , Climent Vicent , Lancis Jesús , Tajahuerce Enrique
Published: November 2021

We present a spatial frequency domain imaging (SFDI) system based on single- pixel imaging (SPI) techniques with a single digital micromirror device (DMD) modulating simultaneously the sinusoidal pattern and the spatial sampling masks.
Towards Objective Corneal Transparency Assessment in the Clinical Setting: Correction of Acquisition Artifacts in Spectral-domain OCT Images
Authors: Vilbert Maëlle , Bocheux Romain , Lama Hugo , Georgeon Cristina , Borderie Vincent , Pernot Pascal , Irsch Kristina , Plamann Karsten
Published: November 2021

We present an automated data analysis procedure for clinical spectral-domain OCT, capable of correcting instrument-related hyperreflective artifacts, and its application to normal corneas. Quantitative parameters related to corneal transparency are extracted from 85 eyes.
Optical encryption using CCRM camera
Authors: Matin Amir , Wang Xu
Published: November 2021

Compressive coded rotating mirror (CCRM) camera is a novel high-speed imaging system that operates using optical encoding and compression that achieves a fast and robust encryption on the data.
Increasing a Microscope’s Effective Field of View via Overlapped Imaging and Machine Learning
Authors: Yao Xing , Xi Haoran , Zhou Kevin C. , Chaware Amey , Cooke Colin , Li Yuting , Dunn Tim , Konda Pavan Chandra , Horstmeyer Roarke
Published: November 2021

We demonstrate a multi-lenses microscopic imaging system that records over- lapping fields-of-view for high-efficiency automated specimen analysis. We show both in simulation and experiment how our system can achieve accurate target object detection on overlapped images.
Solution-processed Plasmonic Surfaces as Selective Infrared Mirrors for Thermography
Authors: Mandal Jyotirmoy , Brewer John , Mandal Sagar , Raman Aaswath
Published: November 2021

Plasmonic nanoparticle-coated metal substrates, made from non-exotic materials using scalable chemical fabrication techniques, yield optical capabilities comparable to those of standard germanium-based optics used in thermography, but at a fraction of the cost.
A Neural Network-Based Automatized Management of N ×N Integrated Optical Switches
Authors: Khan Ihtesham , Masood M Umar , Tunesi Lorenzo , Bardella Paolo , Ghillino Enrico , Carena Andrea , Curri Vittorio
Published: November 2021

We propose a neural network-based automatic management system for N×N optical switch in the context of a software-defined network. The proposed automatic softwarized system operates in a completely agnostic manner in real-time.
An operator’s point of view on 5G X-Haul transport and P2MP applicability
Authors: Rafel Albert
Published: November 2021

5G requires large amount of fibers because of high densities and co-existence with legacy generations. Existence of cell clusters enables large cost savings using P2MP infrastructure. Specific technology depends on RAN configuration and cell capacity.
Tapered Two-Wire Waveguide for Time-Domain Integration of Broadband Terahertz Pulses
Authors: Tomasino Alessandro , Balistreri Giacomo , Dong Junliang , Yurtsever Aycan , Stivala Salvatore , Azaña José , Morandotti Roberto
Published: November 2021

We show the time-domain integration of terahertz pulses achieved in a sub-wavelength, tapered two-wire waveguide. Both simulation and experimental results prove the time integration functionality of this waveguide topology.
DOP Modulation for Data Transmission
Authors: Feuer Mark D.
Published: November 2021

Degree of polarization (DOP) offers a previously unutilized modulation method for polychromatic carriers. We analyze DOP modulation of a two-tone carrier, calculating the BER and quantifying the impact to simultaneous 2-PolSK or 8-PolSK signaling.
A Fully Self-Doped Electrochromic Conjugated Polymer Device Towards Neuromorphic Applications
Authors: Grant Benjamin T. , Bandera Yuriy P. , Foulger Stephen H.
Published: November 2021

Conjugated electrochemical memristors are a promising alternative towards bioelectronic circuitry. A self-doped PEDOT is synthesized, fabricated as a three-terminal device, and studied for electrochromic, memristive, and neuromorphic capabilities.
Optimization of Random Motheye Structures for Silica Windows with Normally Incident Light
Authors: Tu Chaoran , Hu Jonathan , Menyuk Curtis R. , Carruthers Thomas F. , Shaw L. Brandon , Busse Lynda E. , Sanghera Jasbinder S.
Published: November 2021

We computationally investigate random motheye structures for fused silica from 0.4 to 1.0 μm. We found that increasing the randomness of the diameter and height can further suppress the reflection at the air-glass interface.