Article
Multidisciplinary Sciences
Piotr Ryczkowski, Caroline G. Amiot, John M. Dudley, Goery Genty
Summary: Computational spectral-domain ghost imaging is demonstrated by encoding complementary Fourier patterns onto the spectrum of a superluminescent laser diode, increasing signal-to-noise ratio and reducing parasitic light effects. This method has broad applications in remote broadband spectral measurements.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Min-Xu Chiang, Jaturon Tongpakpanang, Wen-Kai Kuo
Summary: This paper presents a measurement system of the phase difference between s- and p-polarization components of light passing through a guided-mode resonance (GMR) device using a digital micromirror device (DMD) grating as a digital phase-shifting device. By implementing phase-shifting interferometry (PSI) with two nearest different diffraction orders as reference and measurement beams, the phase difference can be obtained. Experimental results demonstrate a phase detection limit of 1 degree and the ability to obtain the phase difference curve of the GMR device versus incident angle.
Article
Chemistry, Analytical
Li Ying-Chao, Li Chun-Sheng, Wang Hong-Xia, Jiang Wen-Yu, Si Liu-Zhen, Yang Yu-Qing, Yang Guang, Tian Di
Summary: An experimental system based on DMD for ICP-OES was developed and optimized. The system demonstrated flexible measurement and fast detection capabilities.
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
(2022)
Article
Optics
Caixun Bai, Jianxin Li, Guomei Wang, Cheng Lu, Huanian Zhang, Yue Zhao, Wenfei Zhang, Shenggui Fu
Summary: This paper presents a dual-shearing interferometer (DSI) for multimodal hyperspectral imaging. Two pairs of orthogonally stacked coherent beams are generated by novel birefringent lateral shear-ing splitters. Two sets of interferograms with full pixel resolution are captured alternately in a time sequence in the double Nyquist frequency mode. The feasibility of other modes is discussed, and the proposed method improves the instrument's performance in terms of field of view, polarization, spectral resolution, and spectral range.
Article
Instruments & Instrumentation
Christopher Corden, Pavel Matousek, Claudia Conti, Ioan Notingher
Summary: The study investigated the use of time-gated and micro-spatially offset Raman spectroscopy for sub-surface molecular analysis in optically turbid samples. Multiplexed spectral detection allowed fast acquisition of signals for three-dimensional Raman mapping, demonstrating the potential for practical applications in various fields.
APPLIED SPECTROSCOPY
(2021)
Article
Optics
Yi Xiao, Shiyuan Wei, Shaolong Xue, Cuifang Kuang, Anli Yang, Maoliang Wei, Hongtao Lin, Renjie Zhou
Summary: This study introduces and demonstrates a high-speed FPM method based on laser illumination and digital micro-mirror devices for illumination angle scanning. With this method, quantitative phase imaging and intensity imaging can be achieved at over 42 frames per second with approximately 1 micron lateral resolution, enabling the visualization of membrane height fluctuations in red blood cells and subcellular features in stained cancer tissue slices.
Article
Optics
Fengdi Zhang, Wenbin Xu, Zhuoyu Zhang, Yuning Gao, Zheng Zhou, Xiaoyu Cui, Hao Lei, Shuo Chen
Summary: Programmable hyperspectral imaging is an efficient technique for fast target classification, with a novel splitting strategy proposed to reduce the number of filters while maintaining classification performance. Numerical simulation experiments showed that the proposed splitting strategy can achieve similar classification performance with a reduced number of filters by 25% to 80%.
Article
Optics
Yaoyao Hu, Chengwen Liu, Zi Heng Lim, Yi Qi, Haoyang Sun, Jun Chang, Guangya Zhou
Summary: The time-delay integration (TDI) technique is used to improve the signal-to-noise ratio (SNR) of remote sensing and imaging through multiple exposures. Inspired by TDI, we propose a TDI-like pushbroom multi-slit hyperspectral imaging (MSHSI) approach, using multiple slits to enhance sensitivity and SNR. We establish a linear dynamic model for pushbroom MSHSI and employ the Kalman filter (KF) for image reconstruction on a single image sensor. Experimental results show a significant SNR improvement compared to the single slit mode.
Article
Multidisciplinary Sciences
Weihang Zhang, Jinli Suo, Kaiming Dong, Lianglong Li, Xin Yuan, Chengquan Pei, Qionghai Dai
Summary: This article introduces a handheld multispectral imaging scheme that can achieve tens of megapixel video shooting and demonstrates its wide applications. By proposing an imaging scheme for spatio-spectral data encoding using a thin film camera, introducing a fiber optic plate for a compact prototype supporting pixel-wise encoding, and adopting a deep-network-based algorithm for large-scale multispectral data decoding, the authors show the advantages of this scheme in outdoor imaging of large macroscopic scenes.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Rongjun Shao, Yuan Qu, Chunxu Ding, Kui Ma, Gaoyu Zou, Qiaozhi He, Linxian Liu, Hang Chen, Jiamiao Yang
Summary: This study proposes a light modulation-based volumetric multi-focus scanning (LM-VMS) method, which efficiently scans focused light in three-dimensional space. By modulating a complex field, the position of each focus can be independently controlled. Experimental results demonstrate the excellent performance of this method in a scanning system based on a digital micromirror device.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Optics
Xiangzhe Zhang, Liqing Huang, Jingping Zhu, Ning Zhang, Kang Zong, Lipeng Zhai, Yu Zhang, Yakun Cai, Huimin Wang
Summary: The OPD equations of dual Wollaston prisms with an adjustable air gap are derived using the wave normal tracing method, and their validity is verified. The performance of a novel static birefringent Fourier transform imaging spectrometer based on these prisms is investigated.
Article
Materials Science, Ceramics
Xin Ding, Qiang Zhang
Summary: The study synthesized Cr3+ doped LiSeGe(2)O6 NIR phosphor, which emits NIR-II light in the range of 700-1400 nm. This phosphor has a broad absorption band and can be excited by light of different wavelengths.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
Song-Tao Yu, An Luo, Lei Jiang, Yi-Fan Liu, Lei Gong, Zhen-Sheng Yuan
Summary: A direct binary search (DBS) method is introduced for designing high-resolution complex-amplitude holograms, which increases spatial bandwidth and improves the efficiency of laser light.
Article
Optics
Xue Dong, Yingchao Shi, Xingchen Xiao, Qian Zhang, Fei Chen, Xu Sun, Weizheng Yuan, Yiting Yu
Summary: We propose a non-paraxial diffraction model for the digital micromirror device (DMD) by combining conventional Fraunhofer diffraction with a simplified method of coordinate mapping. The model allows the simulated diffraction patterns to be consistent with experimental results by incorporating aberrations of diffracted wave fields. Experimental and literature verification confirms that the model accurately predicts diffraction angles, orders, and efficiency for arbitrary incident angles and wavelengths. This is the first model capable of describing the non-paraxial diffraction behavior of the DMD and has universal applicability and effectiveness.
Article
Optics
Alexis Jaramillo-Osorio, Santiago Bustamante, Brayan Munoz, Alejandro Velez-Zea, John Fredy Barrera-Ramirez, Roberto Torroba
Summary: This study presents an experimental off-axis optical holographic scheme using a DMD instead of a liquid crystal SLM, verifying its performance as a binary amplitude SLM. Non-linear modifications and multiplexing protocols are applied for data recovery and packaging of the entire scene, with noise-free information recovery achieved using QR codes. The experimental results demonstrate the feasibility and versatility of DMD in holographic schemes.
Article
Optics
Laura O'Donnell, Miles J. Padgett, Steven D. Johnson
Summary: Optical sensing applications rely on the intensity of the measured signal. By illuminating a target with multiple independently controlled beams, the signal returned to the detector can be increased, leading to a significant improvement in the signal-to-noise ratio of the measurement.
Article
Chemistry, Multidisciplinary
Hendrik Sielaff, Frank Dienerowitz, Maria Dienerowitz
Summary: In this study, we combined smFRET and electrokinetic trapping to non-invasively hold single FOF1-ATP synthases. The observation time was extended by a factor of 10 compared to Brownian diffusion without surface attachment. Our method allows for monitoring complete reaction cycles and extracting kinetic rates, making it a versatile tool for studying protein dynamics, not limited to motor proteins.
Article
Multidisciplinary Sciences
Daan Stellinga, David B. Phillips, Simon Peter Mekhail, Adam Selyem, Sergey Turtaev, Tomas Cizmar, Miles J. Padgett
Summary: The study demonstrates high-speed 3D imaging through multimode fibers and correction of aberrations using wavefront shaping. This research applies far-field depth-resolving capabilities to ultrathin microendoscopes, with potential applications in clinical and remote inspection scenarios.
Article
Ethics
Andy Harvey
Summary: James Joyce was deeply engaged with the issues of British imperialism and Irish nationalism in his novels, exploring the complex relationship between the two through the theme of sport. His nuanced understanding of how English culture has influenced Irish society is evident in his works, particularly in Ulysses and A Portrait of the Artist as a Young Man. By applying the political philosophy of Laclau and Mouffe, Joyce deconstructs the binaries in the debate surrounding British colonialism and Irish nationalism.
SPORT ETHICS AND PHILOSOPHY
(2022)
Article
Optics
Tomas Aidukas, Lars Loetgering, Andrew R. Harvey
Summary: Fourier ptychography is a computational method that combines multiple low-resolution images into a high-resolution, large-field of view micrograph. The existing theoretical model neglects the effect of phase-curvature. This paper proposes a simple, efficient, and accurate extension of Fourier ptychography that incorporates phase-curvature into the forward model, enabling quantitative phase reconstruction.
Article
Physics, Multidisciplinary
Po-Cheng Lin, Graham M. Gibson, Miles J. Padgett
Summary: This work demonstrates the real-time visualization of the orbital angular momentum (OAM) carrying acoustic waveform and the optimization of high-order OAM states. The methods used in this study could also be beneficial for other applications requiring acoustic waveform shaping.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Optics
Daniel Olesker, Andrew R. Harvey, Jonathan M. Taylor
Summary: The article introduces a 3D engineered point-spread function microscopy technology that allows snapshot imaging of real-world 3D biological structures while retaining the original resolution of the microscope. The new computational recovery strategy can reconstruct arbitrary 3D structures from 2D raw images.
Article
Optics
Tomas Aidukas, Pavan C. Konda, Andrew R. Harvey
Summary: This study reports a new synthetic-aperture microscopy technique that uses multiple low-power microscope objectives and mutually incoherent detectors to synthesize wide-field, high-resolution images. Compared to conventional methods, this technique reduces image acquisition times by increasing the sampling area of the diffracted field and allows the use of low-cost 3D-printed components for calibration and reconstruction.
Article
Multidisciplinary Sciences
Hugo Defienne, Patrick Cameron, Bienvenu Ndagano, Ashley Lyons, Matthew Reichert, Jiuxuan Zhao, Andrew R. Harvey, Edoardo Charbon, Jason W. Fleischer, Daniele Faccio
Summary: The authors introduce a pixel super-resolution approach based on measuring the full spatially-resolved joint probability distribution of spatially-entangled photons, and improve pixel resolution by a factor two. This technique enables retrieval of spatial information lost due to undersampling and can benefit any full-field imaging system limited by the sensor spatial resolution in quantum imaging schemes.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Steven Johnson, Alex McMillan, Stefan Frick, John Rarity, Miles Padgett
Summary: A limitation of free-space optical communications is the ease of interception, which can be overcome by hiding information within background optical noise. We demonstrate image transfer over free-space using a photon-pair source emitting two correlated beams. One beam contains image information with added noise, while the other correlated beam serves as a heralding trigger to differentiate the image signal from background noise. The system utilizes spontaneous parametric down-conversion and a gated intensified camera to extract the image from the noise.
Article
Optics
Konstantin Y. Bliokh, Ebrahim Karimi, Miles J. Padgett, Miguel A. Alonso, Mark R. Dennis, Angela Dudley, Andrew Forbes, Sina Zahedpour, Scott W. Hancock, Howard M. Milchberg, Stefan Rotter, Franco Nori, Sahin K. Ozdemir, Nicholas Bender, Hui Cao, Paul B. Corkum, Carlos Hernandez-Garcia, Haoran Ren, Yuri Kivshar, Mario G. Silveirinha, Nader Engheta, Arno Rauschenbeutel, Philipp Schneeweiss, Juergen Volz, Daniel Leykam, Daria A. Smirnova, Kexiu Rong, Bo Wang, Erez Hasman, Michela F. Picardi, Anatoly Zayats, Francisco J. Rodriguez-Fortuno, Chenwen Yang, Jie Ren, Alexander B. Khanikaev, Andrea Alu, Etienne Brasselet, Michael Shats, Jo Verbeeck, Peter Schattschneider, Dusan Sarenac, David G. Cory, Dmitry A. Pushin, Michael Birk, Alexey Gorlach, Ido Kaminer, Filippo Cardano, Lorenzo Marrucci, Mario Krenn, Florian Marquardt
Summary: Structured waves are found in all areas of wave physics, both classical and quantum, where the wavefields are inhomogeneous and cannot be approximated by a single plane wave. These complex wavefields with inhomogeneities are crucial in various fields such as nanooptics, photonics, quantum matter waves, acoustics, water waves, etc. This Roadmap surveys the role of structured waves in wave physics, providing background, current research, and anticipating future developments.
Article
Optics
Sara Restuccia, Graham M. Gibson, Leroy Cronin, Miles J. Padgett
Summary: This study demonstrates the measurement of optical activity in a sample using an unpolarized light source, with the help of a polarization-entangled photon source. This approach allows for low light measurement and the analysis of samples that may be perturbed by polarized light.
Article
Optics
Steven Johnson, Alex McMillan, Yril Torre, Stefan Frick, John Rarity, Miles Padgett
Summary: Traditional remote sensing applications based on pulsed laser illumination are not suitable for covert operation. We present a method that uses correlated photon-pairs to perform single-pixel imaging, suppressing background light effect and improving signal-to-noise ratio.
Article
Multidisciplinary Sciences
Akhil Kallepalli, John Innes, Miles J. Padgett
Summary: Single-pixel imaging techniques are being explored as an alternative to focal-plane detector arrays, especially in spectral regions where these arrays are not feasible. By using a phased-array modulator source and compressed sensing, image reconstruction can be achieved successfully in high noise conditions, making this technique applicable to various spectral regions.
SCIENTIFIC REPORTS
(2021)
