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Ghost spintronic THz-emitter-array microscope

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Light(Science & Applications) 2020年第1期9卷 1057-1065页

作者： Si-Chao Chen Zheng Feng Jiang Li Wei Tan Liang-Hui Du Jianwang Cai Yuncan Ma Kang He Haifeng Ding Zhao-Hui Zhai Ze-Ren Li Cheng-Wei Qiu Xi-Cheng Zhang Li-Guo Zhu Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900 SichuanChina Department of Optics and Optical Engineering University of Science and Technology of ChinaHefei 230026 AnhuiChina Microsystem&Terahertz Research Center China Academy of Engineering PhysicsChengdu 610200 SichuanChina Beijing National laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences100190 BeijingChina National laboratory of Solid-State Microstructures and Department of Physics Nanjing UniversityNanjing 210093 JiangsuChina Department of Electrical and Computer Engineering National University of Singapore4 Engineering Drive 3Singapore 117583Singapore The Institute of Optics University of RochesterRochesterNY 14627USA

Terahertz(THz)waves show great potential in nondestructive testing,biodetection and cancer *** recent progress in THz wave near-field probes/apertures enabling raster scanning of an object’s surface,an efficient,nonscanning,noninvasive,deep subdiffraction imaging technique remains ***,we demonstrate THz near-field microscopy using a reconfigurable spintronic THz emitter array(STEA)based on the computational ghost imaging *** illuminating an object with the reconfigurable STEA followed by computing the correlation,we can reconstruct an image of the object with deep subdiffraction *** applying an external magnetic field,inline polarization rotation of the THz wave is realized,making the fused image contrast ***-of-flight(TOF)measurements of coherent THz pulses further enable objects at different distances or depths to be *** demonstrated ghost spintronic THz-emitter-array microscope(GHOSTEAM)is a radically novel imaging tool for THz near-field imaging,opening paradigm-shifting opportunities for nonintrusive label-free bioimaging in a broadband frequency range from 0.1 to 30 THz(namely,3.3-1000 cm^(−1)).

关键词： ghost Ghost GHOST

polarization microwave-induced thermoacoustic imaging for quantitative characterization of deep biological tissue microstructures

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Photonics Research 2022年第5期10卷 1297-1306页

作者： YUJING LI SHANXIANG ZHANG LINGHUA WU ZHONGWEN CHENG ZHENHUI ZHANG HAOHAO WANG SHUXIANG ZHAO MINGYANG REN SIHUA YANG DA XING HUAN QIN MOE key laboratory of Laser Life Science&Institute of Laser Life Science College of BiophotonicsSouth China Normal UniversityGuangzhou 510631China Guangdong Provincial key laboratory of Laser Life Science College of BiophotonicsSouth China Normal UniversityGuangzhou 510631China Guangzhou key laboratory of Spectral Analysis and Functional Probes College of BiophotonicsSouth China Normal UniversityGuangzhou 510631China

polarization optical imaging can be used to characterize anisotropy in biological tissue microstructures and has been demonstrated to be a powerful tool for clinical diagnosis. However, the approach is limited by an inability to image targets deeper than ~1 mm due to strong optical scattering in biological tissues. As such, we propose a novel polarization microwave-induced thermoacoustic imaging(P-MTAI) technique to noninvasively detect variations in deep tissue by exploiting the thermoacoustic signals induced by four pulsed microwaves of varying polarization orientations. The proposed P-MTAI method overcomes the penetration limits of conventional polarization optical imaging and provides submillimeter resolution over depths of several centimeters. As part of the paper, the structural characteristics of tissues were quantified using a new parameter, the degree of microwave absorption anisotropy. P-MTAI was also applied to the noninvasive detection of morphological changes in cardiomyocytes as they transitioned from ordered to disordered states, providing a potential indication of myocardial infarction.

关键词： polarization millimeter scattering

Visualized SERS imaging of Single Molecule by Ag/ Black Phosphorus Nanosheets

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Nano-Micro Letters 2022年第5期14卷 47-61页

作者： Chenglong Lin Shunshun Liang Yusi Peng Li Long Yanyan Li Zhengren Huang Nguyen Viet Long Xiaoying Luo Jianjun Liu Zhiyuan Li Yong Yang State key laboratory of High‑Performance Ceramics and Superfine Microstructures Shanghai Institute of CeramicsChinese Academy of Sciences1295 Dingxi RoadShanghai 200050People’s Republic of China Graduate School of the Chinese Academy of Sciences No.19(A)Yuquan RoadBeijing 100049People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China State key laboratory of Oncogenes and Related Genes Shanghai Cancer InstituteRenji HospitalShanghai Jiaotong University School of Medicine200032 ShanghaiPeople’s Republic of China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510641People’s Republic of China Department of Electronics and Telecommunications Saigon UniversityHochiminh CityVietnam

Single-molecule detection and imaging are of great value in chemical analysis,biomarker identification and other trace detection ***,the localization and visualization of single molecule are still quite a ***,we report a special-engineered nanostructure of Ag nanoparticles embedded in multi-layer black phosphorus nanosheets(Ag/BP-NS)synthesized by a unique photoreduction method as a surfaceenhanced Raman scattering(SERS)*** a SERS substrate features the lowest detection limit of 10^(–20) mol L^(−1) for R6G,which is due to the three synergistic resonance enhancement of molecular resonance,photoinduced charge transfer resonance and electromagnetic *** propose a polarization-mapping strategy to realize the detection and visualization of single *** addition,combined with machine learning,Ag/BP-NS substrates are capable of recognition of different tumor exosomes,which is meaningful for monitoring and early warning of the *** work provides a reliable strategy for the detection of single molecule and a potential candidate for the practical bio-application of SERS technology.

关键词： Black phosphorus Single molecule SERS Exosome Machine learning

Fluorescent probes for imaging and detection of plant hormones and their receptors

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Advanced Agrochem

Advanced Agrochem 2024年第1期3卷 83-98页

作者： Yiliang Chen Bo He Mengxu Hu Jiawei Bao Wei Yan Xinya Han Yonghao Ye State&Local Joint Engineering Research Center of Green Pesticide Invention and Application College of Plant ProtectionNanjing Agricultural UniversityNanjing210095China School of Chemistry and Chemical Engineering Anhui University of TechnologyMa’anshan243032China

Exploring plant behavior at the cellular scale in a minimally invasive manner is critical to understanding plant adaptation to the *** play vital regulatory roles in multiple aspects of plant growth and development and acclimation to environmental *** the biosynthesis,modification,transportation,and degradation of plant hormones in plants change with time and space,their content level and distribution are highly *** monitor the production,transport,perception,and distribution of phytohormones within undamaged tissues,we require qualitative and quantitative tools endowed with remarkably high temporal and spatial *** probes are regarded as excellent tools for widespread plant imaging because of their high sensitivity and selectivity,reproducibility,real-time in situ detection,and uncomplicated mechanism *** this review,we provide a systematical overview of the progress in the sensing and imaging of phytohormone fluorescent probes and fluorescently labeled phytohormones to their receptors in ***,forthcoming viewpoints and possible applications of these fluorescent probes within the realm of plants are also *** hold the conviction that the new perspective brought by this paper can promote the development of fluorescent probes,enabling them to have better detection performance in plant hormone imaging.

关键词： Plant hormones Receptors Fluorescent probe Visualization

Harnessing disordered photonics via multi-task learning towards intelligent four-dimensional light field sensors

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PhotoniX 2023年第1期4卷 218-231页

作者： Sheng-ke Zhu Ze-huan Zheng Weijia Meng Shan-shan Chang Yingling Tan Lu-Jian Chen Xinyuan Fang Min Gu Jin-hui Chen School of Electronic Science and Engineering Xiamen University361005 XiamenChina Innovation laboratory for Sciences and Technologies of Energy Materials of Fujian province(IKKEM) 361005 XiamenChina School of Computer Science and Information Engineering Xiamen Institute of Technology361021 XiamenChina Institute of Photonic Chips University of Shanghai for Science and Technology200093 ShanghaiChina Centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and Technology200093 ShanghaiChina Shenzhen Research Institute of Xiamen University 518000 ShenzhenChina

The complete description of a continuous-wave light field includes its four fundamental properties:wavelength,polarization,phase and ***,the simultaneous measurement of a multi-dimensional light field of such four degrees of freedom is challenging in conventional optical systems requiring a cascade of dispersive and polarization *** this work,we demonstrate a disordered-photonics-assisted intelligent four-dimensional light field *** is achieved by discovering that the speckle patterns,generated from light scattering in a disordered medium,are intrinsically sensitive to a high-dimension light field given their high structural degrees of ***,the multi-task-learning deep neural network is leveraged to process the single-shot light-field-encoded speckle images free from any prior knowledge of the complex disordered structures and realizes the high-accuracy recognition of full-Stokes vector,multiple orbital angular momentum(OAM),wavelength and *** proof-of-concept study shows that the states space of four-dimensional light field spanning as high as 1680=4(multiple-OAM)×2(OAM power spectra)×15(multiple-wavelength)×14(polarizations)can be well recognized with high accuracy in the chip-integrated *** work provides a novel paradigm for the design of optical sensors for high-dimension light fields,which can be widely applied in optical communication,holography,and imaging.

关键词： Disordered photonics Liquid crystals Light field detection Deep learning

Integrated-resonant metadevices:a review

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Advanced Photonics 2023年第2期5卷 7-33页

作者： Jin Yao Rong Lin Mu Ku Chen Din Ping Tsai City University of Hong Kong Department of Electrical EngineeringHong KongChina City University of Hong Kong Centre for BiosystemsNeuroscienceand NanotechnologyHong KongChina City University of Hong Kong State Key Laboratory of Terahertz and Millimeter WavesHong KongChina

Integrated-resonant units(IRUs),associating various meta-atoms,resonant modes,and functionalities into one supercell,have been promising candidates for tailoring composite and multifunctional electromagnetic responses with additional degrees of ***-resonant metadevices can overcome many bottlenecks in conventional optical devices,such as broadband achromatism,efficiency enhancement,response selectivity,and continuous tunability,offering great potential for performant and versatile application *** focus on the recent progress of integrated-resonant *** from the design principle of IRUs,a variety of IRU-based characteristics and subsequent practical applications,including achromatic imaging,light-field sensing,polarization detection,orbital angular momentum generation,metaholography,nanoprinting,color routing,and nonlinear generation,are *** challenges in this field and opinions on future research directions are also provided.

关键词： integrated-resonant units metadevices metasurfaces nanophotonic devices planar optics

Integrated structured light manipulation

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Photonics Insights 2024年第3期3卷 1-144页

作者： Jian Wang Kang Li Zhiqiang Quan Wuhan National laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhanChina Optics Valley laboratory WuhanChina

Structured light,also known as tailored light,shaped light,sculpted light,or custom light,refers to a series of special light beams with spatially variant amplitudes and phases,polarization distributions,or more general spatiotemporal *** the past decades,structured light featuring distinct properties and unique spatial or spatiotemporal structures has grown into a significant research field and given rise to many developments from fundamentals to *** recently,integrated structured light manipulation has become an important trend in the frontier of light field manipulation and attracted increasing interest as a highly promising technique for shaping structured light in an integrated,compact,and miniaturized *** this article,we give a comprehensive overview of recent advances in integrated structured light manipulation(generation,processing,detection,and application).After briefly introducing the basic concept and development history of structured light,we present representative works in four important aspects of integrated structured light manipulation,including multiple types of integrated structured light generation,many sorts of integrated structured light processing,diverse forms of integrated structured light detection,and various kinds of integrated structured light *** focus on summarizing the progress of integrated structured light manipulation from basic theories to cutting-edge technologies,to key devices,and to a wide variety of applications,from orbital angular momentum carrying light beams to more general structured light beams,from passive to active integration platforms,from micro-nano structures and metasurfaces to 2D photonic integrated circuits and 3D photonic chips,from in-plane to out-of-plane,from multiplexing to transformation,from linear to nonlinear,from classical to quantum,from optical communications to optical holography,imaging,microscopy,trapping,tweezers,metrology,***,we also discuss in de

关键词： light field manipulation structured light orbital angular momentum micro-nano structures metasurfaces photonic integration silicon photonics optical communications

detection of spores using polarization image features and BP neural network

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International Journal of Agricultural and Biological Engineering 2024年第5期17卷 213-221页

作者： Yafei Wang Ning Yang Guoxin Ma Mohamed Farag Taha Hanping Mao Xiaodong Zhang Qiang Shi School of Agricultural Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Jiangsu Changdian technology Co. Ltd.Jiangyin 214400JiangsuChina School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Department of Soil and Water Sciences Faculty of Environmental Agricultural SciencesArish UniversityNorth Sinai 45516Egypt School of Science and technology Shanghai Open UniversityShanghai 200433China

Timely detection and control of airborne disease is important to improve productivity. This study proposed a novel approach that utilizes micro polarization image features and a backpropagation neural network (BPNN) to classify and identify airborne disease spores in a greenhouse setting. Firstly, disease spores were collected in the greenhouse, and their surface morphological parameters were analyzed. Subsequently, the micropolarization imaging system for disease spores was established, and the micropolarization images of airborne disease spores from greenhouse crops were collected. Then the micropolarization images of airborne disease spores were processed, and the image features of polarization degree and polarization angle of disease spores were extracted. Finally, a disease spore classification model based on the BPNN was ultimately developed. The results showed that the texture position of the surface of the three disease spores was inconsistent, and the texture also showed an irregular shape. Texture information was present on the longitudinal and transverse axes, with the longitudinal axis exhibiting more uneven texture information. The polarization-degree images of the three disease spores exhibit variations in their representation within the entirety of the beam information. The disease spore polarization angle image exhibited the maximum levels of contrast and entropy when the Gabor filter’s direction was set to π/15. The recognition accuracy of cucumber downy mildew spores, tomato gray mildew spores, and cucumber powdery mildew spores were 75.00%, 83.33%, and 96.67%, respectively. The average recognition accuracy of disease spores was 86.67% based on BPNN and micropolarization image features. This study can provide a novel method for the detection of plant disease spores in the greenhouse.

关键词： greenhouse spores micropolarization image BPNN image processing detection

Comparative study of differential polarization imaging using linear and circular polarization in different scattering medium

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Journal of Measurement Science and Instrumentation 2022年第2期13卷 173-183页

作者： TIAN Heng WU Yelin TIAN Jingjing ZHANG Bo ZHU Jingping School of Physics and Electronic Information Engineering Henan Polytechnic University Jiaozuo 454003 China Shaanxi key Lab of Information Photonic Technique Xi’an Jiaotong University Xi’an 710049 China

Differential polarization imaging has been widely used to selectively probe the target embedded in turbid medium.A thorough understanding of image quality involved in differential polarization imaging is essential for practical *** polarized light Monte Carlo simulations,it has been investigated how the state of polarization of incident light and the optical properties of scattering medium affect the image *** contrast for linear polarization is similar to that for circular polarization in the isotropic medium comprising *** image quality is more pronounced for circular polarization in the isotropic medium containing large-particles and the birefringent ***,differential polarization imaging provides better image quality for the birefringent medium compared with isotropic *** effect of particle-size and birefringence on the polarization characteristics of target light and backscattered light is *** the help of numerical results,the polarization characteristics of target light and backscattered light,the image quality is well explained in the turbid medium mentioned above.

关键词： polarization imaging target detection Monte Carlo simulation scattering birefringence