bluuebunny/crossref_metadata_2025 huggingface dataset:
Real-time in situ study of adsorption kinetics in PMMA thin films using infrared spectroscopy
Authors: Lee Tse-Ang , Kowal Gina , Peng Jessie , Hutter Tanya
Published: September 2022

Studying adsorption in polymers is important for many applications. We present results on real-time in situ adsorption of ethanol and water in thin polymethyl methacrylate (PMMA) layers using attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR).
TEM-based single-shot coherent 3D imaging
Authors: Balakrishnan Deepan , Chee See Wee , Bosman Michel , Loh Duane
Published: September 2022

We propose a novel coherent imaging method for the 3D-reconstruction of nanomaterials from a single HRTEM micrograph. This method determines the thickness and depth maps from overlapping sub-patches within a micrograph’s absorption and phase contrast.
Learning-assisted Matrix-Pencil Method for Indirect Time-of-Flight Image Demixing
Authors: Kumar Saurabh , Kagawa Keiichiro , Nagahara Hajime
Published: September 2022

We present a learning-based approach to estimate scene sparsity from time-of-flight measurements and address leakage artifacts to obtain improved demixing performance from matrix pencil method. Experiments are conducted in our simulator framework using the MitsubaToF renderer.
CMSnet: State of the Art Deep Learning Multiscale Reconstruction for Compressive Sensing
Authors: Kravets Vladislav , Stern Adrian
Published: September 2022

We present what is, to the best of our knowledge, state-of-the-art reconstruction results for deep learning-based multiscale compressive sensing. Our reconstruction method is compared to a variety of recent compressive sensing reconstruction methods.
Noise estimation via the optimal truncation variation for multimode fiber single-pixel imaging
Authors: Xiang Yangyang , Hu Xingzhuo , Li Ruoxuan , Li Junhui , Lan Mingying , Ma Jianxin , Gao Li
Published: September 2022

Through the variation of the optimal truncation for multimode fiber single-pixel imaging (MMF-SPI) using truncated singular value decomposition, the source and level of system noise could be determined and estimated which is desired for MMF-SPI.
Modeling the Photoacoustic Spectrum of a Quantum Cascade Laser for Human Breath
Authors: Moser Elisabeth , Pangerl Jonas , Jobst Simon , Weigl Stefan , Bierl Rudolf
Published: September 2022

A modeling approach to create a photoacoustic spectrum from synthetic data is presented and evaluated. The resulting model reaches a MAPE score of 2.7% and can be used to enable data-driven development in future work.
Design and training of a deep neural network for estimating the optical gain in pyramid wavefront sensors
Authors: Weinberger Camilo , Guzmán Felipe , Tapia Jorge , Neichel Benoit , Vera Esteban
Published: September 2022

This work shows the design and training of a convolutional neural network to improve the linear response of a modulated pyramid wavefront sensor, allowing to estimate and compensate for the optical gain in real time.
Adapting the Design of the Modal Holographic Wavefront Sensor to Present Atmospheric Turbulence Conditions
Authors: Zepp Andreas , Gladysz Szymon , Osten Wolfgang , Stein Karin
Published: September 2022

The modal holographic wavefront sensor enables fast measurements of individual aberration modes without the need for time-consuming calculations. To minimize the effect of inter-modal crosstalk on the measurement accuracy, we present sensor optimization and show its performance in closed-loop adaptive optics in simulation.
Vectorial adaptive optics: correction of polarization and phase
Authors: He Chao , Booth Martin J.
Published: September 2022

We extend the adaptive optics (AO) technique into the vectorial domain, encompassing feedback correction of both polarisation and phase. We show the new AO can be implemented in various ways from sensor-based to sensorless.
An Adaptive Twyman-Green Interferometer for Motion-Free Characterization of Sample Thickness or Refractive Index
Authors: Reza Syed Azer , Imeri Arjent
Published: September 2022

In this paper, we present an adaptive Twyman-Green interferometer configuration for measuring the thickness of a transparent sample of a known refractive index or vice versa via an adaptive beam control inside a Twyman-Green interferometer.
Two-Color Time-Resolved Interferometry for Shock-Wave and Conductivity Analysis of a Threshold Electrostatic Discharge
Authors: Schrama Claudia A. M. , Barolak Jonathan J. , Adams Daniel , Durfee Charles
Published: September 2022

We are using a two-color Mach-Zehnder interferometer with multi-frame cameras to measure the electrode and neutral atom density in a threshold electrostatic discharge system through FFT phase retrieval using visible and IR laser sources.
Heralded Single Photons for Holography
Authors: Abramović Denis , Demoli Nazif , Skenderović Hrvoje
Published: September 2022

We introduce holographic concept based on heralded single photons. The developed quantum approach can extract holographic information even in situations when classical approach fails to detect the information.
A Fast Robust Phase Restoration Algorithm
Authors: Luo Gang , Guo Ruiming , Zhou Renjie , Blu Thierry
Published: September 2022

We present an algorithm to correct aberrations in off-axis quantitative phase microscopy. The distortion is efficiently estimated by fitting a polynomial model to the wrapped phase iteratively. Robustness to noise and phase discontinuity is demonstrated.
Orientation Imaging using Tensorial Ptychography
Authors: Norris Evan , Van Der Kolk Jarno , Ramunno Lora
Published: September 2022

Tensorial framework of ptychographic for simultaneous reconstruction of second order nonlinear optical susceptibility tensor components and analytical method for extracting orientation information from numerically generated collagen sample is demonstrated.
Classification and reconstruction of spatially overlapping phase objects through diffractive networks
Authors: Mengu Deniz , Veli Muhammed , Rivenson Yair , Ozcan Aydogan
Published: September 2022

We present diffractive networks that can all-optically classify spatially-overlapping phase objects. Individual phase images of the overlapping objects are also reconstructed using electronic networks that process the compressed signals, all-optically synthesized by a diffractive network.
Volumetric Reconstruction from 2D Projection Data for Fast 3D Imaging
Authors: Olesker Daniel , Chen Bingying , Manton James D. , Fiolka Reto , Harvey Andrew R. , Taylor Jonathan M.
Published: September 2022

Imaging biological dynamics in 3D requires fast, high-resolution volumetric imaging techniques. We present a 3D-from-2D imaging pipeline that permits volumetric reconstruction from 2D projection snapshots, applicable to a range of microscopy image acquisition platforms.
Transport of intensity diffraction tomography with non-interferometric synthetic aperture
Authors: Zuo Chao , Li Jiaji , Zhou Ning , Sun Jiasong , Zhou Shun , Bai Zhidong , Lu Linpeng , Chen Qian
Published: September 2022

We present a new label-free three-dimensional (3D) microscopy technique, termed transport of intensity diffraction tomography with non-interferometric synthetic aperture (TIDT-NSA). Without resorting to interferometric detection, TIDT-NSA retrieves the 3D refractive index (RI) distribution of biological specimens from 3D intensity-only measurements at various illumination angles based on an off-the-shelf bright-field microscope with a programmable light-emitting-diode (LED) illumination source, allowing incoherent-diffraction-limited quantitative 3D phase-contrast imaging.
Deep Hyperspectral microscopy based on structured light sheet
Authors: Crombez S , Exbrayat-Heritier C , Ruggerio F , Ray C , Ducros N
Published: September 2022

We describe a computational hyperspectral microscope based on a structured light sheet that is generated using a digital micromirror device only. To reduce the acquisition time, we consider a small number of structured patterns. We solve the resulting inverse problem using an unrolled deep neural network, which limits the loss of spatial resolution.
An OAM Based Optical Wavelet Transform using Single Pixel Detection
Authors: Free Justin , Dai Kunjian , Miller Keith , Johnson Eric
Published: September 2022

This paper presents an optical probing method utilizing an Orbital Angular Momentum based wavelet for structured light illumination with single pixel detection. This wavelet transform enables multi-resolution analysis of OAM information in space and time.
Structured Illumination for High-speed Image Acquisition and Enhancement of Moving Objects Beyond 20 m Distance
Authors: Divitt Shawn , Gemar Heath , Judd K. Peter , Watnik Abbie T.
Published: September 2022

A high-speed projection and camera system generates structured illumination images of moving objects at distances beyond 20 m. Images are processed via incoherent Fourier ptychography, giving resolution beyond the best-focus capability of the camera optics alone.
Improved Sensitivity of Distributed Fibre Optical Sensing Using Structured Sampling
Authors: Jiang Shan , Zhong Zhuqiang , Jin Wei , He Jiaxiang , Giddings Roger , Tang Jianming
Published: September 2022

A structured sampling scheme for fiber optical sensing in the digital domain is proposed and demonstrated experimentally, which improves the fiber optical sensing sensitivity by 4dB without any hardware modification compared with conventional pulse-based system.
Sensor Optimization for Image-Based Geolocation
Authors: Renshaw C. Kyle , Hewitt Jennifer , Grimming Robert , Driggers Ronald G.
Published: September 2022

Image-based geolocation can provide vehicle positioning independent of GPS. We model positioning performance using triangulation from geo-referenced landmarks pre-selected from geospatial databases. We describe the accuracy and availability of this navigation implementation.
Open-path measurement of water isotopologues with mid-infrared dual-comb spectroscopy
Authors: Herman Daniel I. , Mead Griffin J. , Malarich Nathan A. , Giorgetta Fabrizio R. , Baumann Esther , Washburn Brian R. , Newbury Nathan R. , Coddington Ian , Cossel Kevin C.
Published: September 2022

Using an open-path mid-infrared dual-comb spectrometer, we measure the δD of atmospheric water vapor at a remote site with <2‰ precision in 1000 seconds. The data is well-correlated with measurements from a point sensor network.
Frequency Scale Calibration for High-Resolution Quantum Cascade Laser Dual-Comb Spectroscopy
Authors: Gianella Michele , Komagata Kenichi N. , Vogel Simon , Wittwer Valentin J. , Bertrand Mathieu , Schilt Stéphane , Faist Jérôme , Südmeyer Thomas , Emmenegger Lukas
Published: September 2022

We present a mid-infrared dual comb spectrometer featuring fast acquisition (54 ms), high spectral resolution (630 kHz), and high frequency accuracy (2 MHz), in the 7.8 µm wavelength range.
Free-running dual-comb spectroscopy based on space-multiplexing and error correction
Authors: Li Yu , Yu Haoyang , Ma Qiuying , Wang Yue , Zhou Qian , Ren Wei , Ni Kai
Published: September 2022

We demonstrate a free-running dual-comb spectroscopy with low complexity and high performance. By using space-multiplexed mode-locked fiber lasers and error correction, long-term mutual coherence can be reconstructed without any active control.
Optical identification of car tire particles on soil using fluorescence lifetime imaging microscopy
Authors: Wohlschläger Maximilian , Versen Martin , Laforsch Christian
Published: September 2022

Tire wear is one of the major contributors of environmental pollution by microplastic. FD-FLIM in combination with an image processing algorithm are successfully applied to detect tyre wear on soil.
Deep Learning Models for Road Damages Detection
Authors: Cullen Myles , Ali Muhammad Mahmood
Published: September 2022

This paper presents deep-learning-based image analysis for the detection and classification of road damage, tested for sample images from Ireland. Experimental results showed suitable performance for two of the most prevalent classes of road damage.
Design and Testing of Integrated Photonic Chip for Convolution Neural Network
Authors: Peserico Nicola , Yang Hangbo , Ma Xiaoxuan , Li Shurui , Hosseini Mostafa , George Jonathan K. , Gupta Puneet , Wong Chee Wei , Sorger Volker J.
Published: September 2022

We present our implementation of a Convolution Neural Network employing an Integrated Photonic Chip (PIC) to perform the high-speed optical FFT, showing the Silicon Photonic design, the initial optical response, and packaging.
Line-field white light interferometry using tunable-path-difference source
Authors: Kim Jaeheung , Truong Nguyen Thanh Phong , Oh Junghwan , Kim Chang-Seok
Published: September 2022

We propose line-field white light interferometry using a tunable-path-difference source, improving imaging performance. By simultaneously acquiring signals along the line, the system has higher imaging speed and stability for a wide field of view imaging.
Attosecond-resolution autocorrelator
Authors: Morland Imogen , Zhu Feng , Leach Jonathan
Published: September 2022

Measuring target depths has applications in biophysics. We propose a method for measuring the single depth to attosecond resolution within 15 seconds and 32 x 32 pixel depths to nanometre resolution using an autocorrelator.
Optical coherent tomography with extended depth of focus based on zinc selenide lens chromatic dispersion
Authors: Romodina Maria N. , Singh Kanwarpal
Published: September 2022

Using a single zinc selenide lens with ultrahigh chromatic dispersion, we demonstrate an optical coherence tomography system with 2.7 times extended depth of focus compare to the system with conventional optical elements.
Flexible-type Ultrathin Holographic Endoscope for Microscopic Imaging of Unstained Biological Tissues
Authors: Kang Munkyu , Choi Wonjun , Hong Jin Hee , Katz Ori , Lee Byunghak , Kim Guang Hoon , Choi Youngwoon , Choi Wonshik
Published: September 2022

We present a fully flexible and ultrathin lensless fiber endoscope that can perform high-resolution holographic imaging of unstained tissues through a narrow and curved passage. A unique algorithm is developed for calibration-free holographic image reconstruction.
Wedge Angle and Direction Detection of Multi-opening Object Using Deep Learning
Authors: Zhang Yiwen , Li Si-Ao , Wang Xiaoyan , Xu Haoyuan , Wang Jinyao , Liu Yan-Ge , Zhang Weigang , Geng Zihan , Ren Yongxiong , Bao Changjing , Pan Zhongqi , Yue Yang
Published: September 2022

CNN is used to identify the number of openings, wedge angle and direction of multi-opening object with probing Gaussian beam. 97.37% accuracy is achieved for different classifications with 1° precision and up to 36 openings.
Optical characterization of the Sandia fog facility for computational sensing
Authors: Bentz Brian Z. , Pattyn Christian A. , Redman Brian J. , Zenker John P. , Deneke Elihu , Sanchez Andres L. , Westlake Karl , van der Laan John D. , Wright Jeremy B.
Published: September 2022

We present optical metrology at the Sandia fog chamber facility. Repeatable and well characterized fogs are generated under different atmospheric conditions and applied for light transport model validation and computational sensing development.
Holographic Techniques for Shockwave and Thermal Distortion Cancellation
Authors: Marsh Andrew W. , Mazumdar Yi Chen
Published: September 2022

Shockwaves and thermal gradients can cause significant distortion in digital holograms. In this work, we describe a new electric field propagation method for numerical distortion cancellation and demonstrate its application to characterizing energetic materials.
Femtosecond rotational CARS with quantum control of molecular rotation
Authors: Hosseinnia Ali , Raveesh Meena , Dominguez Armand , Ruchkina Maria , Bood Joakim
Published: September 2022

Quantum control is implemented in a 2-beam fs/ns rotational CARS setup via a second control pulse with variable delay. The potential of the concept for improved diagnostics is demonstrated by species-selective enhancement/annihilation via field-free alignment.
Broadband H2O and Temperature Measurements in Dynamic H2/O2 Flames using a Swept-Wavelength ECQCL
Authors: Phillips Mark C. , Butler Austin , Glumac Nick G. , DeMagistris Michael D. , Ruesch Morgan , Zambon Andrea C. , Sinha Neeraj
Published: September 2022

Absorption spectra from 950-1170 cm-1 are measured at 500 Hz with a swept-wavelength external cavity quantum cascade to determine H2O temperatures and column densities in propagating H2/O2 flames and compared to computational fluid dynamic models.
Temperature Uncertainty Improvements of Surface Phosphor Thermometry for Imaging Applications
Authors: Xavier P. , Petit S. , Grisch F.
Published: September 2022

Temperature uncertainty improvements of surface phosphor thermometry imaging are reported, with the intensity-ratio method. Analysis of optical filters/post-processing spatial filters with Mg4FGeO6:Mn4+ thermographic phosphors results in a ≈1% temperature uncertainty between 300 and 825 K.
Combined Digital In-Line Holography and Particle Image Velocimetry Diagnostics of Dust Clouds Prior to Ignition
Authors: Schweizer Christian , Mashuga Chad V. , Kulatilaka Waruna D.
Published: September 2022

Two advanced laser methods are used to study dust cloud ignitability in standard ignition testing devices. DIH and PIV are combined for quantitative particle and flow characteristics inside the explosion tube prior to ignition.
Multiple-sound-source-excitation quartz-enhanced photoacoustic spectroscopy based on a single-line spot pattern multi-pass cell
Authors: Cui Ruyue , Dong Lei , Chen Weidong , Tittel Frank K. , Wu Hongpeng
Published: September 2022

Multiple-sound-source-excitation quartz-enhanced photoacoustic spectroscopy (MSSE-QEPAS) based on a single-line spot pattern multi-pass cell (MPC) is reported for gas sensing. Compared with conventional QEPAS, the signal is enhanced by a factor of 20.
Optical characteristics of bilayer decoupling MoS2 grown by the CVD method
Authors: Hu Xiao-Wen , Yang Ming-Ming , Zhang Yu-Fan , Wu Heng , Yu Zheng-Kang , Guo Qing-Lin , Wang Ying , Cong Ri-Dong , Liang Bao-Lai , Li Xiao-Li
Published: September 2022

Study of exciton recombination process is of great significance for the optoelectronic device applications of two-dimensional transition metal chalcogenides (TMDCs). This research investigated the decoupling MoS2 structures by photoluminescence (PL) measurements. First, PL intensity of the bilayer MoS2 (BLM) is about twice of that of the single layer MoS2 (SLM) at low temperature, indicating no transition from direct bandgap to indirect bandgap for BLM due to the decrease of interlayer coupling which can be shown by Raman spectra. Then, the localized exciton emission appears for SLM at 7 K but none for BLM, showing different exciton localization characteristics. The PL evolution with respect to the excitation intensity and the temperature further reveal the filling, interaction, and the redistribution among free exciton states and localized exciton states. These results provide very useful information for understanding the localized states and carrier dynamics in BLM and SLM.
Single-beam comagnetometer using elliptically polarized light for dual-axis rotation measurement
Authors: Liang Yixiang , Jiang Liwei , Liu Jiali , Zhu Jun , Shao Qi , Fan Shimiao , Li Xiaoping , Quan Wei
Published: September 2022

We have developed a single-beam spin-exchange relaxation-free comagnetometer using elliptically polarized light for dual-axis rotation measurement. The light beam propagating through the glass cell is simultaneously used for optical pumping and signal extraction. Combined with transverse magnetic field modulation, the rotation information can be collected through a balanced polarimeter module and a lock-in amplifier. Also, we propose a decoupling method by adjusting the phase shift of the reference signal, allowing the device to realize biaxial signal decoupling while still maintaining its self-compensation state. Compared to those without decoupling, our method improves the performance of our device in its signal-to-noise ratio and rotation sensitivity. The single-beam comagnetometer scheme and the decoupling method have a positive impact on the development of miniaturized atomic sensors for high-precision inertial measurement.
Efficient generation of a dual-polarized vortex wave with an ultrathin Huygens’ metasurface
Authors: Xue Chun-hua , Zhao Huachen , Li Teng , Gao Xi
Published: September 2022

In this paper, an ultrathin Huygens’ metasurface is designed for generating an orbital angular momentum (OAM) beam. The Huygens’ metasurface is a double-layered metallic structure on a single-layer PCB. Based on induced magnetism, the Huygens’ metasurface achieves the abilities of available near-complete transmission phase shift around 28 GHz. According to the principle of vortex wave generation, a Huygens’ metasurface is designed, implemented and measured. The simulated and measured results show that the dual-polarized OAM transmitted waves with the mode l = 1 can be efficiently generated on a double-layered Huygens’ metasurface around 28 GHz. The measured peak gain is 23.4 dBi at 28 GHz, and the divergence angle is 3.5°. Compared with conventional configurations of OAM transmitted beam generation, this configuration has the advantages of high gain, narrow divergence angle, and low assembly cost. This investigation will provide a new perspective for engineering application of OAM beams.
Ultralow-level all-optical self-switching in a nanostructured moiré superlattice
Authors: Zhang Zhongshuai , Liu Di , Huo Yanyan , Ning Tingyin
Published: September 2022

We report an all-optical self-switching performed at an ultralow-level of intensity in a nanostructured moiré superlattice on a silicon platform. The moiré superlattice was formed by twisting two sets of triangular lattices in a silicon membrane in the same layer with a twist angle of 9.43°. The near flatband was formed, and the electric field was well confined in the center of the superlattice, which enabled all-optical switching under an ultralow intensity when the Kerr nonlinearity of silicon was considered. The intensity, which was reduced to 300 W/m2 and even 20 W/m2, can cause the transmittance of the nanostructure to change from 0 to 80% under x- and y-polarized pump light, respectively, and could be further decreased by optimizing the nanostructure or nonlinear materials. The results indicate that moiré superlattices fabricated from nonlinear materials are promising for integrated all-optical devices.
Single-photon nonlinearities and blockade from a strongly driven photonic molecule
Authors: Nigro Davide , Clementi Marco , Brés Camille-Sophie , Liscidini Marco , Gerace Dario
Published: September 2022

Achieving the regime of single-photon nonlinearities in photonic devices by just exploiting the intrinsic high-order susceptibilities of conventional materials would open the door to practical semiconductor-based quantum photonic technologies. Here we show that this regime can be achieved in a triply resonant integrated photonic device made of two coupled ring resonators, in a material platform displaying an intrinsic third-order nonlinearity. By strongly driving one of the three resonances of the system, a weak coherent probe at one of the others results in a strongly suppressed two-photon probability at the output, evidenced by an antibunched second-order correlation function at zero-time delay under continuous wave driving.
The earth’s atmosphere works like a spherical lens
Authors: da Cruz Gerson Kniphoff
Published: September 2022

This work presents investigations in geometrical optics for high incident angles region and how it can show the atmosphere spherical lens work, adding the prediction and detection of the dawn and dusk arcs.
Optical propagation over water: Wave optics simulation compared to experimental measurements
Authors: Rabinovich William S. , Mahon Rita , Ferraro Mike S.
Published: September 2022

The United States Naval Research Laboratory has maintained a 16 km free space optical link across the Chesapeake Bay. We compare measurements of optical scintillation to wave optics simulation.
Propagation studies of ultrafast high intensity pulses in the atmosphere
Authors: Richardson Martin , Reyes Danielle , Peña Jessica , Smith LaShae , Thome Owen , Salfer-Hobbs Matthew , Bernath Robert
Published: September 2022

Developments in high power ultrafast laser and optical technologies now permit concentrated studies of new spatial and temporal modalities of laser pulses propagating long distances in the nonlinear filamentation regime.
Novel link budget modelling for NLOS submarine optical wireless links
Authors: Samaniego-Rojas Paulo , Salcedo-Serrano Pedro , Boluda-Ruiz Rubén , Garrido-Balsells José María , García-Zambrana Antonio
Published: September 2022

We present an analytic expression for the link budget for NLOS submarine optical wireless links. The results show that the optimum value of the receiver angle depends mainly on scattering and the transmitter source parameters.
Strategies for Correction of Atmospheric and Underwater Effects on Laser Communications Systems
Authors: Gladysz Szymon
Published: September 2022

The Adaptive Optics Research Group at Fraunhofer IOSB has developed several novel solutions to problems faced by terrestrial, space-based and underwater laser-based communications. These solutions will be presented and their efficacy demonstrated in real turbulence.
Thermal Effects in Short Laser Pulses: Suppression of Wave Collapse
Authors: Akers Benjamin , Liu Tony
Published: September 2022

Numerical simulation of short laser pulses at powers near the boundary of the self-focusing regime is presented. The model includes contributions from thermal blooming (suppressing wave collapse) and the Kerr effect (driving wave collapse).
Efficiently Calculating Extended Isoplanatic Angles Over Horizontal Paths
Authors: Burrell Derek , Kemnetz Matthew , Beck Jeffrey , Beason Melissa
Published: September 2022

We present closed-form expressions for low-order-aberration-removed, aperture-averaged anisoplanatic error across horizontal paths. These solutions are not only computationally inexpensive but easily invertible to numerically calculate extended isoplanatic angles in a given propagation scenario.
Mid-infrared single-photon upconversion spectroscopy based on temporal-spectral quantum correlation
Authors: Cai Yujie , Chen Yu , Xin Xiaoning , Huang Kun , Wu E
Published: September 2022

Promoting the sensitivity of mid-infrared (MIR) spectroscopy to the single-photon level is a critical need for investigating photosensitive biological samples and chemical reactions. MIR spectroscopy based on frequency upconversion is a compelling pioneer allowing high-efficiency MIR spectral measurement with well-developed single-photon detectors, which overcomes the main limitations of high thermal noise of current MIR detectors. However, noise from other nonlinear processes caused by strong pump fields hinders the development of the upconversion-based MIR spectroscopy to reach the single-photon level. Here, a broadband MIR single-photon frequency upconversion spectroscopy is demonstrated based on the temporal-spectral quantum correlation of non-degenerate photon pairs, which is well preserved in the frequency upconversion process and is fully used in extracting the signals from tremendous noise caused by the strong pump. A correlation spectrum broader than 660 nm is achieved and applied for the demonstration of sample identification under a low incident photon flux of 0.09 average photons per pulse. The system is featured with non-destructive and robust operation, which makes single-photon-level MIR spectroscopy an appealing option in biochemical applications.
Quantum metasurface holography
Authors: Yang Jia-Zhi , Zhao Rui-Zhe , Meng Zhe , Li Jian , Wu Qing-Yuan , Huang Ling-Ling , Zhang An-Ning
Published: September 2022

Metasurface holography has great application potential in the fields of optical display, optical storage, and security. Traditional metasurface holography uses the well-designed subwavelength structure to modulate the incident laser beam. Although many researches about laser metasurface holography have been realized, metasurface holography based on quantum light sources is rare. Here, we realized quantum metasurface holography through single-photon and multichannel polarization multiplexing metasurfaces, and we compared the quantum results with laser results. Our work proves that quantum light sources can be well modulated by the subwavelength structure of integrated metasurfaces and extend both fields of metasurfaces and quantum optics. This result shows that metasurfaces have the potential for use in various quantum devices to reduce the size of quantum devices, improve quantum efficiency, and enhance practicability, reliability, and accuracy.
Solution-processed electroluminescent white-light-emitting devices based on AIE molecules and Cu-In-Zn-S nanocrystals
Authors: Lv Peiwei , Liu Zhenyang , Zhao Jinxing , Xiong Zuping , Wang Lijin , Li Xu , Qian Zhaosheng , Tang Aiwei
Published: September 2022

Solution process is a key technique for the manufacture of large-area and low-cost semiconducting devices and, thus, attracts a lot of attention from both academia and industry. Herein, we realized solution-processed light-emitting diodes (excluding a cathode) based on aggregation-induced emission (AIE) molecules of tetraphenylethylene-4Cl (TPE-4Cl) and cadimum-free semiconductor nanocrystals (NCs) for the first time. By mixing Cu-In-Zn-S NCs and TPE-4Cl as an emissive layer, a new type of environmentally friendly white-light-emitting diodes (WLEDs) was prepared through a solution-processed technique. After systematical optimization of the as-prepared WLEDs, the corresponding color rendering index can reach up to 87 with a maximum luminance of

262
  
cd/

m

2

. This study may pave a new road to realize AIE-based WLEDs through a solution-processed technique.
Laser Doppler Multi-Beam Differential Vibration Sensor Based on Line-Scan CMOS Camera for Real-time Buried Objects Detection
Authors: Aranchuk V. , Johnson S. , Aranchuk I. , Hickey C.
Published: September 2022

A Laser Doppler multi-beam differential vibration sensor based on a digital line-scan CMOS camera and FPGA based real-time signal processing has been developed. The application of the sensor for real-time detection of buried objects has been demonstrated.
Improving the Limit of Detection of Tilted Fiber Bragg Gratings by Multiresonant Data Extraction
Authors: Kelly-Richard Alexandre , Albert Jacques
Published: September 2022

A multiresonant approach using shifts of 27 cladding mode resonances of a tilted fiber Bragg grating refractometer yields a four-fold improvement in the limit of detection relative to using only the single-most sensitive resonance.
The widely tunable quantum cascade laser pumped molecular laser
Authors: Chevalier Paul , Amirzhan Arman , Rowlette Jeremy , Stinson H. Ted , Pushkarsky Michael , Day Timothy , Capasso Federico , Everitt Henry O.
Published: September 2022

The quantum cascade laser pump molecular laser (QPML) is a tunable source of terahertz frequencies operating at room temperature that can easily scale beyond the milliwatt level. We present here new progress in QPML research.
Nanodiamond@Glass Core-Shell Nanoparticles for Sensing
Authors: Sun Qiang , Hemmer Philip R. , Greentree Andrew D.
Published: September 2022

We consider Nanodiamond@glass core-shell nanoparticles as a new class of quantum biosensors to address the considerable variability of NV- emission properties in individual nanodiamonds.
Cooling rubidium atoms with a photonic integrated 3D magneto-optical trap
Authors: Isichenko Andrei , Chauhan Nitesh , Bose Debapam , Kunz Paul D. , Blumenthal Daniel J.
Published: September 2022

We demonstrate an integrated photonics infrastructure for atomic laser cooling. We trap 5 x 106 87Rb atoms in a magneto-optical trap using free-space cooling beams emitted from a SiN photonic integrated circuit.
Laser-dye-filled micro-structured multi-holey fiber for random-laser-based sensor applications
Authors: Han M. , Yeo M. , Jeong Y.
Published: September 2022

We investigate a micro-structured multi-holey fiber filled with a rhodamine 6G solution as a random laser source platform for sensor applications. We verify that it successfully produces random laser output consisting of various quasi-modes out of the multiple holes.
High phase sensitivity interferometer sensor based on external cavity laser
Authors: Jang Hansol , Park Sang Min , Cho Soon-Woo , Kim Chang-Seok
Published: September 2022

In this research, we have proposed novel interferometer sensor technology based on external cavity laser. Unlike conventional interferometer sensors, phase sensitivity can be amplified by increasing the initial optical path length difference of the interferometer.
So close but so different: Time-Resolved PhotoElectron Circular Dichroism in Camphor and Fenchone
Authors: Blanchet Valérie , Descamps Dominique , Petit Stéphane , Mairesse Yann , Pons Bernard , Fabre Baptiste
Published: September 2022

The relaxation dynamics of camphor and fenchone excited molecules are studied using time-resolved photoelectron circular dichroism. Experimental investigations, coupled to quantum and classical calculations, enables us to highlight the interplay between internal and external degrees of freedom.
Attosecond continuous-beam transmission electron microscope
Authors: Ryabov A. , Tsarev M. , Nabben D. , Kuttruff J. , Thurner J.W. , Baum P.
Published: September 2022

A continuous-wave laser is used to bunch the electron beam inside a transmission electron microscope into attosecond electron pulses for visualizing light-matter interaction on the basis of the atoms and the cycles of light.
Sub-Two-Cycle Carrier-Envelope-Phase‒Stabilized 110W, 1.1mJ Laser
Authors: Hädrich Steffen , Tschernajew Maxim , Shestaev Evgeny , Stutzki Fabian , Walther Nico , Just Florian , Karl Florian , Breitkopf Sven , Herrfurth Oliver , Seres Imre , Jójárt Péter , Várallyay Zoltán , Börzsönyi Adám , Müller Michael , Grebing Christian , Hoff Dominik , Paulus Gerhard G. , Eidam Tino , Limpert Jens
Published: September 2022

We present a sub-2-cycle laser system combining high average power, pulse energy and repetition rate emitting 5.8-fs pulses with CEP-stable operation that make this system an ideal driver for next-generation attosecond sources.
Rapid motion-free generation of interpulse delays for time-domain pump-probe spectroscopies with amplified fs pulses
Authors: Flöry T. , Stummer V. , Pupeikis J. , Willenberg B. , Phillips C. R. , Keller U. , Pugžlys A. , Baltuška A.
Published: September 2022

We present a dual-channel ultrafast amplifier delivering millijoule energy with electronically tunable delay of the output pulses from femtoseconds to milliseconds with femtosecond precision. Millijoule energies allow frequency-conversion enabling numerous applications in linear and nonlinear spectroscopy.
Charge-density wave amplitude mode in 1T-TiSe2 probed by core-level transient absorption spectroscopy
Authors: Heinrich Tobias , Chang Hung-Tzu , Zayko Sergey , Sivis Murat , Ropers Claus
Published: September 2022

We use high-sensitivity ultrafast high-harmonic spectroscopy to track coherent phonons in the charge-density wave phase of 1T-TiSe2. Using harmonics near the Ti-M-edge, we distinguish spectral signatures of the 3.3-THz amplitude mode and 6-THz optical phonons.
Atomic-resolution imaging of complex chiral molecular structures by machine learning based laser-induced electron diffraction
Authors: Liu Xinyao , Amini Kasra , Sanchez Aurelien , Belsa Blanca , Steinle Tobias , Chirvi Katharina , Biegert Jens
Published: September 2022

We show how laser-induced electron diffraction (LIED) techniques combined with convolutional neural networks (CNNs) enable atomic-resolution imaging of the complex chiral molecule Fenchone (C10H16O).
Core-level photoemission time delay in heteronuclear diatomic molecules at high energy via multiple scattering theory
Authors: Tamura Yoshiaki , Yamazaki Kaoru , Ota Fukiko , Ueda Kiyoshi , Hatada Keisuke
Published: September 2022

We derived analytical formulas of core level photoemission time delay from heteronuclear diatomic molecules and discussed their behaviors in the high energy regime, comparing them with the theoretical results for C(1s) photoemission from CO molecules.
Spectroscopic Signature of Hydrogen Transfer Dynamics in Acetylacetone
Authors: Green Alice E. , List Nanna , Champenois Elio , Ware Matthew , Driver Taran , Boguslavskiy Andrey , Bucksbaum Phil , Cheng Xinxin , Coslovich Giacomo , Forbes Ruaridh , Glownia James M. , Guehr Markus , Kamalov Andrei , Lever Fabiano , Li Siqi , Li Xiang , Lin Ming-Fu , Martinez Todd J. , Mayer Dennis , O’Neal Jordan , Peard Nolan , Roeder Anja , Stolow Albert , Walter Peter , Wang Anna L. , Yang Jie , Cryan James , Wolf Thomas J. A.
Published: September 2022

We present results from an ultrafast X-ray absorption spectroscopic study into the dynamics of gas-phase UV-photoexcited acetylacetone molecules, revealing signatures of non-adiabatic dynamics and ultrafast hydrogen transfer.
Ultrafast Scanning Tunneling Microscopy
Authors: Ma Boyang , Goldner Adi , Krüger Michael
Published: September 2022

We integrate a conventional scanning tunneling microscope (STM) with an ultrafast carrier-envelope-phase stable laser. Simulations show that the observed laser-driven tunneling current consists of single attosecond bursts. This innovation promises simultaneous ångström and attosecond observations.
Two-Dimensional Electronic Spectroscopy Reflects Fine Structure of Holes in CdSe Quantum Dots
Authors: Brosseau Patrick , Kambhampati Patanjali
Published: September 2022

Two-dimensional electronic spectroscopy of CdSe quantum dots shows no sign of fast hole trapping and excited state absorption dynamics reveal fine structure relaxation that could account for the lack of hole bleach.
Multi-wavelength Ultrafast Ptychography: A Flexible Beamline with a Compact High Harmonic Source
Authors: Bevis Charles S. , Grova Carmelo , Adams Daniel A. , Svetina Cristian S. , Mancini Giulia F.
Published: September 2022

We report the design of a flexible beamline for ultrafast multiwavelength ptychography to image nano-to-mesoscale heterogeneity in nanostructures and interfaces, with quantitative amplitude and phase contrast, sub-50nm spatial and sub-50fs temporal resolutions.
Time-Resolved Electron and Hole Transfer Dynamics in a TMD Heterostructure by Two-Dimensional Electronic Spectroscopy
Authors: Policht Veronica R. , Russo Mattia , Liu Fang , Trovatello Chiara , Maiuri Margherita , Bai Yusong , Zhu Xiaoyang , Dal Conte Stefano , Cerullo Giulio
Published: September 2022

Photoexcited electrons and holes rapidly undergo spatial separation in transition metal dichalcogenide Heterostructures (HS) with Type II band alignment. Using Two-dimensional Electronic Spectroscopy, we simultaneously detect interlayer hole and electron transfer in a WS2/MoS2 HS with sub-100 fs timescales.
Dual-Mode Vibrational Polariton Dynamics Probed with Collinear 2D-IR
Authors: Duan Rong , Kubarych Kevin J.
Published: September 2022

A fully collinear beam geometry enables access to the level structure and ultrafast dynamics, with angle-tunable Hopfield coefficients, of two different vibrational modes of a molecule coupled to two different Fabry-Pérot cavity modes.
Efficient single-cycle pulse compression of milliJoule energy ytterbium femtosecond pulses
Authors: Tsai Ming-Shian , Liang An-Yuan , Tsai Chia-Lun , Lai Po-Wei , Lin Ming-Wei , Chen Ming-Chang
Published: September 2022

We introduce a new post-compression, cascaded focus and compression, to shorten the mJ-level pulses at 1030 nm by a factor of 50 down to 3.1 fs (single-cycle) with an output pulse energy of 0.98 mJ and an overall efficiency of 73%.
Covariance Velocity Map Imaging Measurements of Strong Field Double Ionization
Authors: Cheng Chuan , Singh Vaibhav , Matsika Spiridoula , Weinacht Thomas
Published: September 2022

We carry out strong field double ionization measurements of
deuterated formaldehyde using covariance velocity map imaging.
Comparing our measurements with trajectory surface hopping
calculations, we find that we produce a surprising distribution of
dicationic states.
Visualizing Coherent Molecular Rotation in a Gaseous Medium [1, 2]
Authors: Tutunnikov Ilia , Prost Emilien , Steinitz Uri , Béjot Pierre , Hertz Edouard , Billard Franck , Faucher Olivier , Averbukh Ilya Sh.
Published: September 2022

We present a study of a non-intrusive optical scheme for visualizing the rotational dynamics in an anisotropic molecular gas. The proposed optical method is promising for visualizing the rotations of symmetric- and asymmetric-top molecules.
Strong Field Simulator: Attosecond Study of Strong Field Ionization in Noble Gas Atoms
Authors: Liu Qiaoyi , Piper Andrew , Kiesewetter Dietrich , Tang Yaguo , Agostini Pierre , Schafer Kenneth J. , DiMauro Louis F.
Published: September 2022

Our strong field simulator method decouples ionization from acceleration and recollision though an XUV-seeded process, allowing for robust multi-dimensional study of strong field recollision that bypasses the limit of tunneling ionization.
Chirped-Pulse Up-Conversion Spectroscopy Applicable to Terahertz Waveform Detection in Time-Domain
Authors: Tamaki Ryo , Suzuki Masashi , Takeda Jun , Katayama Ikufumi
Published: September 2022

Terahertz waveform was detected in time-domain using chirped-pulse up-conversion spectroscopy combined with dispersion compensation. Terahertz waveforms were accurately measured without any distortion due to the spectral interference, providing a scheme for single-shot terahertz time-domain spectroscopy.
Ultrafast Local Sensing of Strain and Temperature with a Single Semiconductor Quantum Dot
Authors: Henzler Philipp , Kalibar Darius Hashemi , Tenne Ron , Leitenstorfer Alfred
Published: September 2022

Femtosecond pump-probe microscopy of individual semiconductor quantum dots reveals energy shifts induced by coherent strain waves and the transition to incoherent heating at the nanoscale.
Experimental Investigation of Strong-Field Ionization from Multiphoton to Tunneling Regimes Using Cross-Polarized Temporal Interferometry
Authors: Nie Zan , Nambu Noa , Marsh Kenneth A. , Patchkovskii Serguei , Morales Felipe , Smirnova Olga , Welch Eric , Matteo Daniel , Pigeon Jeromy , Joshi Chan
Published: September 2022

We have measured strong-field ionization yield versus laser intensity for various noble gases (Ar, Kr, Xe) and light polarizations from ultraviolet to near-infrared (267-800 nm), from multiphoton to tunneling regimes using cross-polarized temporal interferometry.
Ultrafast Charge Injection Dynamics in π −Conjugated Zinc Porphyrin and Fullerene bulk heterojunction blend
Authors: Biswas Chinmoy , Tomar Dipin , Dasgupta Jyotishman , Raavi Sai Santosh Kumar
Published: September 2022

Ultrafast photo charge-generation kinetics are investigated in bulk heterojunction blend of zinc porphyrin and fullerene utilizing near infra-red femtosecond transient absorption spectroscopy. Data revealed charge formation < 100fs and long-lived charge kinetics.
Controlling photothermal dynamics in gold nanoparticle-loaded agarose gel for plasmon-enhanced drug release
Authors: Schirato Andrea , Moretti Luca , Mazzanti Andrea , Rossetti Arianna , Polito Laura , Pizzetti Fabio , Sacchetti Alessandro , Cerullo Giulio , Rossi Filippo , Della Valle Giuseppe , Maiuri Margherita
Published: September 2022

We combine ultrafast transient absorption spectroscopy and hot-electrons modelling for non-invasive investigation of the aggregation state of plasmonic nanoparticles loaded in hydrogel, having crucial role in light-to-heat conversion dynamics and enhancing drug release efficiency.
Electron-ion Coincidence Imaging of O2 in Intense Laser Fields with Additional Dissociation Pulses
Authors: Ikeya Daimu , Matsuda Akitaka , Fushitani Mizuho , Hishikawa Akiyoshi
Published: September 2022

Electron-ion coincidence spectroscopy is powerful to elucidate tunneling ionization dynamics, but applicable only to molecules susceptible to dissociation. Here we introduce a novel scheme with additional pulses, which has been successfully applied to O2 HOMO-1.
Intersubband Shift Currents in Asymmetric Quantum Wells as a Source of Mono-Cycle Terahertz Pulses
Authors: Runge M. , Kang T. , Biermann K. , Reimann K. , Woerner M. , Elsaesser T.
Published: September 2022

Transient electronic shift currents generated upon intersubband excitation of asymmetric AlGaAs quantum wells efficiently emit mono-cycle terahertz (THz) pulses. The mechanism is characterized and separated from difference-frequency generation by nonlinear two-dimensional THz spectroscopy.
Quantum Optimal Control for Ultrafast X-ray Spectroscopy of Conical Intersections
Authors: Keefer Daniel , Mukamel Shaul
Published: September 2022

Dynamical coherent signatures of conical intersections are intrinsically weak, rendering their direct detection highly complicated. We present potent quantum optimal control strategies to selectively amplify and isolate them, enabling novel spectroscopic measurement regimes.
Selective-bond breaking of CF4 in phase-locked ω-2ω intense laser fields
Authors: Hasegawa Hiroka , Walmsley Tiffany , Matsuda Akitaka , Morishita Toru , Madsen Lars Bojer , Jensen Frank , Tolstikhin Oleg I. , Hishikawa Akiyoshi
Published: September 2022

To extend application of ω-2ω intense field reaction control to highly symmetric molecules, CF4 was studied by three-dimensional momentum imaging. The C-F bond directed along larger side of the laser fields tends to be broken.
Photoelectron circular dichroism as a probe for ground-state dynamics
Authors: Waters Max D.J. , Ladda Nico , Senftleben Arne , Belozertsev Mikhail , Svoboda Vít , Baumert Thomas , Wörner Hans Jakob
Published: September 2022

We demonstrate dynamics in the electronic ground state of a chiral molecule via VUV-ionisation in a velocity-map-imaging spectrometer. The dynamics are simplified by measuring time-resolved PECD, which is sensitive to a subset of nuclear motions.
Conical-intersection dynamics probed at the carbon K-edge
Authors: Lanfaloni Valentina Utrio , Zinchenko Kristina S. , Ardana-Lamas Fernando , Monahan Nicholas , Seidu Issaka , Neville Simon P. , van der Veen Joscelyn , Schuurman Michael S. , Wörner Hans Jakob
Published: September 2022

We demonstrate attosecond transient-absorption spectroscopy (ATAS) at the carbon K-edge as a powerful technique to detect few-femtosecond electronic dynamics driven by conical intersections in gas-phase organic molecules, revealing the fastest electronic relaxation measured to date.
Flowing vibronic coherence in Furan with AttoXAFS
Authors: Severino S. , Ziems K.M. , Reduzzi M. , Summers A. , Sun H.-W. , Chien Y.-H. , Gräfe S. , Biegert J.
Published: September 2022

We apply attosecond time-resolved carbon K-edge spectroscopy to simultaneously follow the coherent evolution and interplay of electronic and nuclear wavepackets after strong-field excitation of furan and retrieve their configurations along the ultrafast nonadiabatic relaxation pathways.
Acousto-optic modulator pulse-shaper compression, characterization, and control of 5 fs pulses
Authors: Kaufman Brian , Catanese Anthony , Cheng Chuan , Jones Eric , Cohen Martin G. , Weinacht Thomas
Published: September 2022

We use an acousto-optic modulator based pulse shaper to compress octave-spanning pulses from a stretched hollow-core fiber, characterize the pulses through a pulse shaper assisted version of dispersion scans, and shape the pulses for time resolved measurements of molecular dynamics.
Probing the Ultrafast Charge Carrier Dynamics in Mn-doped ZnO Nanoparticles
Authors: Kahraman A. , Bacellar C. , Nazari M. , Cannizzo A. , Milne C.
Published: September 2022

Manganese doping of ZnO nanoparticles, by introducing midgap states, is a potential solution to overcome the limitations of rapid recombination of photogenerated carriers. Ultrafast transient anisotropy measurements uncover the trapping dynamics upon Mn doping.