Article
Physics, Applied
Yuchen He, Jianming Yu, Shitao Zhu, Xiaoming Chen, Anxue Zhang, Zhuo Xu
Summary: Conventional multi-transmitter-based microwave computational ghost imaging (MCGI) systems face radiation source errors due to limitations in array unit performance. This paper conducts a detailed error analysis of radiation sources in MCGI systems and determines the relationships between radiation source errors, reference radiation field, and imaging results. An improved MCGI method based on a broadband polarization-sensitive-metasurface is proposed to mitigate the influence of radiation source errors and other problems in conventional MCGI systems. Simulations and experiments validate the analysis results and demonstrate the effectiveness of the proposed method in obtaining target information.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
Valerio Flavio Gili, Dupish Dupish, Andres Vega, Massimo Gandola, Enrico Manuzzato, Matteo Perenzoni, Leonardo Gasparini, Thomas Pertsch, Frank Setzpfandt
Summary: Quantum ghost imaging (QGI) is an imaging protocol that exploits photon-pair correlations from spontaneous parametric down-conversion (SPDC). In this study, a two-dimensional single-photon avalanche diode (SPAD) array detector is used for spatially resolving the path in QGI implementation. By utilizing non-degenerate SPDC, samples can be investigated at infrared wavelengths without the need for SWIR cameras, while spatial detection can still be performed in the visible region using silicon-based technology. These findings advance QGI schemes for practical applications.
Article
Optics
Margie P. Olbinado, David M. Paganin, Yin Cheng, Alexander Rack
Summary: Advances in X-ray imaging have led to breakthroughs in various fields, but achieving high spatial resolution while reducing radiation dose remains challenging. Ghost imaging shows promise in reducing dose and achieving high resolution, but current protocols are limited in achieving phase contrast and image quality.
Article
Optics
Wenlin Gong
Summary: This paper compares the performance differences of computational ghost imaging (CGI) and single-pixel camera (SPC) in different light disturbance environments. It is found that SPC always produces better image quality than CGI under the same conditions. Local light disturbance has a larger impact on both CGI and SPC compared to global light disturbance. Additionally, a method to improve the reconstruction result of SPC is proposed and its effectiveness is verified through numerical simulation when the source's energy is unstable and there is light disturbance during the detection process.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Aditya Saxena, Manpreet Kaur, Vipin Devrari, Mandip Singh
Summary: This study uses hyper-entangled photons to demonstrate the polarization-dependent phase shift and spatial correlations in a transparent polarisation sensitive phase pattern. By detecting the interaction and imaging of photons with the pattern, a quantum ghost image is constructed.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Min Tao, Xiaobin Gong, Jian Guan, Junfeng Song, Zhixin Song, Xueyan Li, Shuxu Guo, Jian Chen, Siyao Yu, Fengli Gao
Summary: The study proposes a method to screen data by setting two threshold values during the sampling process, which can improve the quality of reconstructed images and speed up the computation process.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Osian Wolley, Thomas Gregory, Sebastian Beer, Takafumi Higuchi, Miles Padgett
Summary: Classical light sources and quantum light sources exhibit different performances in imaging systems. By using a photon counting camera, we recorded an image formed from photon-pair events, achieving a greater contrast than possible using classical light sources. This experimental result suggests the potential advantages of using photon counting cameras in quantum imaging schemes.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Zhiyuan Ye, Jun Xiong, Hong-Chao Liu
Summary: The new technology called ghost difference imaging (GDI) is introduced, which allows the differential imaging of multiple components of a target at different degrees of freedom in a single acquisition without additional digital subtraction operations, improving signal-to-noise ratio.
PHYSICAL REVIEW APPLIED
(2021)
Article
Optics
Zhijie Tan, Hong Yu, Ruiguo Zhu, Ronghua Lu, Shensheng Han, Chaofan Xue, Shumin Yang, Yanqing Wu
Summary: The study introduces an X-ray single-exposure Fourier-transform ghost imaging (SFGI) approach, which can achieve Fourier information retrieval of unknown samples and has successfully demonstrated diffraction patterns in the experiment.
Article
Engineering, Electrical & Electronic
Qi Wang, Jia-Shuai Mi, Hao-Ran Shi, Zong-Qi Bai, Long Chen, Hao-Tian Li, Ling-Ling Zhang, Yong Zhao
Summary: This article proposes an image reconstruction algorithm that uses a single-layer neural network to fit the forward physical model of ghost imaging, aiming to reconstruct higher quality images with fewer measurements. The effectiveness of this approach has been verified through simulations and experiments, showing that it can recover high-quality images at low sampling ratios and reconstruct objects perfectly from undersampled data. Its imaging quality and efficiency surpass those of some traditional ghost imaging techniques.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Physics, Applied
Jun-Tian Ye, Chao Yu, Wenwen Li, Zheng-Ping Li, Hai Lu, Rong Zhang, Jun Zhang, Feihu Xu, Jian-Wei Pan
Summary: We demonstrate photon-counting single-pixel imaging in the ultraviolet region using a 4H-SiC single-photon avalanche diode (SPAD) as a high-performance compact single-photon detector. By developing a tailored readout circuit with active hold-off time, we restrain detector noise and operate the SPAD in the free-running mode. With structured illumination, we reconstruct compressed images at a 4 fps frame rate, demonstrating the capability of ultraviolet imaging applications.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Leihong Zhang, Zhixiang Bian, Hualong Ye, Dawei Zhang, Kaimin Wang
Summary: The study developed a CGAN algorithm to restore images and trained the network with simulation data to improve the effectiveness of the proposed method. The results showed significant improvement in average PSNR and SSIM, indicating the great potential of the method for imaging under low photon conditions.
OPTICS COMMUNICATIONS
(2022)
Article
Optics
Yong Guo, Hongyi Han, Luwei Wang, Yinru Zhu, Zhigang Yang, Xiaoyu Weng, Wei Yan, Junle Qu
Summary: We investigated a novel volumetric single-photon excitation microscope with an ultralong anti-diffracting (UAD) beam as illumination. The UAD beam showed significantly larger axial imaging range compared to conventional Gaussian and Airy beams, while maintaining narrow lateral width. By comparing the imaging capabilities in strongly scattering environments, we demonstrated the advantages of the UAD mode in terms of deeper axial projection and increased imaging speed. Additionally, the symmetrical curve trajectory of the UAD beam and its axial depth in the lateral position can be used for micro-object localization.
Article
Optics
Gongxin Yao, Yiwei Chen, Chen Jiang, Yixin Xuan, Xiaomin Hu, Yong Liu, Yu Pan
Summary: Deep learning is a valuable tool for single-photon light detection and ranging (LiDAR), offering high photon efficiency and image reconstruction quality. However, existing methods suffer from high memory usage and slow inference speed. In this study, we propose an efficient neural network architecture that exploits data sparsity, resulting in reduced storage and computation overhead. Our method supports high spatial resolution one-shot processing and achieves over 90% acceleration in computation speed without sacrificing reconstruction quality. Importantly, its speed is not affected by the detection distance.
Article
Optics
Zhuo Yu, Xiao-Qian Wang, Chao Gao, Zhe Li, Huan Zhao, ZhiHai Yao
Summary: A novel technique is proposed in this study to avoid negative illumination and involves only one round of measurements to recover object information, with half the measurements compared to conventional schemes. This method is not limited to Hadamard pattern and may have relevance for the general development of computational ghost imaging.
Article
Physics, Multidisciplinary
B. Pinheiro da Silva, V. A. Pinillos, D. S. Tasca, L. E. Oxman, A. Z. Khoury
PHYSICAL REVIEW LETTERS
(2020)
Article
Multidisciplinary Sciences
T. Gregory, P-A Moreau, E. Toninelli, M. J. Padgett
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
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
Multidisciplinary Sciences
T. Gregory, P-A Moreau, S. Mekhail, O. Wolley, M. J. Padgett
Summary: An improved quantum illumination protocol is proposed in this study, which can reject up to >= 99.9% of background light and sensor noise in the low photon flux regime without the need for scene information or noise statistics. This enhancement enables extremely low light quantum imaging techniques to be applied in previously challenging environments, contributing to the development of covert imaging, quantum microscopes, and quantum LIDAR.
SCIENTIFIC REPORTS
(2021)
Article
Nanoscience & Nanotechnology
Braian Pinheiro da Silva, Wagner T. Buono, Leonardo J. Pereira, Daniel S. Tasca, Kaled Dechoum, Antonio Z. Khoury
Summary: In this study, the transfer of angular momentum between spin and orbital degrees of freedom in structured light beams during frequency upconversion is demonstrated. The experimental results align well with the theoretical predictions for the nonlinear optical response.
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
M. R. Maia, D. Jonathan, T. R. de Oliveira, A. Z. Khoury, D. S. Tasca
Summary: Interference is a mechanism to structure waves into fascinating patterns, playing a crucial role in sensing, imaging, trapping, and fundamental research. This study shows how to structure light into distributions with collapse and revival structures in its wavefront using coherent optical fields as probes.
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
Physics, Multidisciplinary
Thais L. Silva, Lukasz Rudnicki, Daniel S. Tasca, Stephen P. Walborn
Summary: This article discusses how to discretize continuous quantum variables using the properties of quantum information tasks and demonstrates through mutual unbiasedness that these coarse-grained observables are neither completely continuous nor completely discrete. The research finds that these observables have a certain mixed characteristic.
PHYSICAL REVIEW RESEARCH
(2022)
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)
Article
Optics
W. T. Buono, A. Santos, M. R. Maia, L. J. Pereira, D. S. Tasca, K. Dechoum, T. Ruchon, A. Z. Khoury