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Editorial for the Special Issue on Subwavelength Optics

Engineering 2025年第2期45卷 1-2页

作者： Xiangang Luo nghua Teng Mingbo Pu National Key Laboratory of Optical Field Manipulation Science and Technology Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China College of Materials Sciences and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Institute of Materials Research and Engineering Agency for Science Technology and Research(A*STAR)Singapore 138634Singapore Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China

The field of subwavelength optics has opened new avenues for investigating light-atter interactions by enabling the exploration of novel phenomena at the subwavelength *** recent decades,advancements in fundamental understanding and micro-nanotechnologies have significantly propelled the development of subwavelength optics and its practical applications.

关键词： subwavelength optics micro nanotechnologies light matter interactions practical applications

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Design and Study of a Pump-Free Microfluidic Device for Single-Cell Electro-Rotation Driven by Electro-Osmotic Flow 38

Design and Study of a Pump-Free Microfluidic Device for Sing...

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38th IEEE International Conference on Micro Electro Mechanical systems, MEMS 2025

作者： Shu, Jianming Wang, Xijiang Wang, Yue Qian, Jingui Huang, Liang Hefei University of Technology Anhui Province Key Laboratory of Measuring Theory and Precision Instrument School of Instrument Science and Opto-Electronics Engineering Hefei230009 China

ISBN: (纸本)9798331508890

This work presents a flow cytometry electro-rotation (EOT) microdevice combined with electroosmotic flow (EOF). The device implements pump-free single-cell mobility control using EOF actuation. It combines stable and controllable cell movement with a thick electrode structure to enable flow cytometry-based electrorotation operations. The use of thick electrodes resolves non-uniform electric field distribution, improving measurement conditions for single-cell electrical analysis via electrorotation. This device resolves the challenge of single-cell loading in EOT, enhances the measurement throughput, and offers new design insights for single-cell EOT structures. © 2025 IEEE.

关键词： Microfluidics

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Design of improved error-rate sliding window decoder for SC-LDPC codes: reliable termination and channel value reuse

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optoelectronics Letters 2025年第4期21卷 212-217页

作者： JIA Xishan LI Jining YAO Yuan WANG Yifan LIU Bo XU Degang School of Precision Instruments and Opto-electronics Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Optoelectronics Information Technology(Ministry of Education) Tianjin UniversityTianjin 300072China Institute of Modern Optics College of Electronic Information and Optical EngineeringNankai UniversityTianjin 300350China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Tianjin 300350China

In this paper,an improved error-rate sliding window decoder is proposed for spatially coupled low-density parity-check(SC-LDPC)*** the conventional sliding window decoder,the message retention mechanism causes unreliable messages along the edges of belief propagation(BP)decoding in the current window to be kept for subsequent window *** improve the reliability of the retained messages during the window transition,a reliable termination method is embedded,where the retained messages undergo more reliable parity ***,decoding failure is unavoidable and even causes error propagation when the number of errors exceeds the error-correcting capability of the *** mitigate this problem,a channel value reuse mechanism is designed,where the received channel values are utilized to reinitialize the ***,considering the complexity and performance of decoding,a feasible sliding optimized window decoding(SOWD)scheme is ***,simulation results confirm the superior performance of the proposed SOWD scheme in both the waterfall and error floor *** work has great potential in the applications of wireless optical communication and fiber optic communication.

关键词： reliable termination message retention mechanism reliable termination method sliding window decoderthe error rate sliding window decoder belief propagation bp decoding retained messages

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Infrared image and circular polarization image processing methods for high-concentration scattering environments

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Applied Optics 2025年第12期64卷 3140-3149页

作者： Zhao, Dengke Wei, Yongqing Hong, Lu Xia, Haojie Huang, Liang Zhang, Jin School of Instrument Science and Opto-electronics Engineering Hefei University of Technology Hefei230009 China Anhui Province Key Laboratory of Measuring Theory and Precision Instrument Hefei230009 China Engineering Research Center of Safety Critical Industrial Measurement and Control Technology Ministry of Education Hefei230009 China

In high-concentration scattering media, low contrast often obscures the surface details and textures of target objects. This paper proposes a method to enhance imaging quality under such conditions using polarization imaging theory. The method involves image registration, estimation of environmental transmittance, calculation of the degree of polarization and polarization difference intensity, and application of the CLAHE method to improve detail visibility and obtain de-scattered images. Finally, a weighted adaptive wavelet transform based on edge detection fuses the de-scattered and infrared images. Experimental results show that the proposed method outperforms traditional approaches, particularly in high-concentration scattering environments, offering insights into combining infrared and polarized imaging for challenging scenarios. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Circular polarization

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Performance assessment of octagonal layout based integrated photonic reservoir computing for optical channel equalization

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Optics Express 2025年第7期33卷 15814-15826页

作者： Zuo, Xiaoyan Pei, Li Bai, Bing Bai, Bowen Hu, Zhouyi Wang, Jianshuai Qu, Qi Dong, Fei Institute of Lightwave Technology Beijing Jiaotong University Ministry of Education Key Laboratory of All-Optical Networks and Modern Communication Networks Beijing100044 China Technology Co. Ltd. China State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Beijing Aerospace Institute for Metrology and Measurement Technology Beijing100076 China

Compared to electronic equalizers, the equalizers based on integrated photonic reservoir computing exhibit the advantages of large bandwidth, short latency, and low power consumption. The existing rectangular reservoir layout employs internal nodes as input and output nodes, leading to inadequate signal exchange and extra noise due to waveguide crossing. We proposed an optical channel equalizer based on an octagonal reservoir layout and verified its equalization ability. The system-level simulation of the proposed layout is conducted to investigate the impact of layout shape, node quantity, input and output port number, and weight algorithm on channel equalization performance in a 25Gbaud 4-level pulse amplitude modulation optical communication system. Results indicate that, within a transmission distance of 5-30 km, the bit error rate (BER) of the equalized signal in the proposed octagonal layout is lower than that of a rectangular layout with the same number of nodes. Specifically, at 5 km, the octagonal layout’s BER is 5 and 10 orders of magnitude lower than the rectangular layout and the feedforward equalizer, respectively. Meanwhile, the best readout algorithm, K-nearest neighbor regression, achieves an equalized BER of 7.012 × 10−14 © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Pulse amplitude modulation

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Oxygen and point defect-related luminescence in AlN epitaxial layers grown by MOCVD

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Optics Letters 2025年第8期50卷 2498-2501页

作者： Zhang, Yuheng Yang, Jing Liang, Feng Liu, Zongshun Hou, Yufei Liu, Bing Zheng, Fu Liu, Xuefeng Zhao, Degang Laboratory of Solid-State Optoelectronic Information Technology Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China College of Materials Sciences and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing100049 China Key Laboratory of Electronics and Information Technology for Space Systems National Space Science Center Chinese Academy of Sciences Beijing100190 China

The optical properties of aluminum nitride (AlN) materials were investigated using cathodoluminescence (CL), revealing two deep-level related emission peaks located at 340nm and 380 nm. These emission peaks are similar to the "yellow luminescence peak"observed in GaN materials. By increasing the acceleration voltage, it was found that the intensity of these peaks remained unchanged initially and then increased. Additionally, an increase in the injected current led to the emergence of a new emission peak at 320 nm. The tests indicated that these deep-level emissions are related to oxygen atoms and aluminum vacancy defects. Further investigations showed that controlling the TMAl injection, NH3 injection, and growth pressure could suppress the formation of oxygen atoms and point defects. © 2025 Optica Publishing Group.

关键词： Aluminum nitride

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A novel single-substrate Sr2Ga2SiO7:Tb3+ green phosphor for full-spectrum white LED

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Applied Physics A 2025年第6期131卷 1-10页

作者： Liu, Zhifang Wang, Subin Xu, Yingchao Li, Jing Du, Yunxiang Hong, Junhuang Chen, Zhenyu School of Opto-Electronic and Communication Engineering Xiamen University of Technology Xiamen China Fujian Provincial Key Laboratory of Opto-Electronics Technology and Devices Xiamen China

A series of novel silicate green phosphors Sr2-xGa2SiO7: xTb3+ (with x ranging from 0.01 to 0.06) were successfully synthesized by the high-temperature solid-state reaction technique. The samples were analyzed for their phase morphology, luminescent properties, concentration quenching, thermal stability, fluorescence lifetime and CIE chromaticity coordinates. Under the excitation of 370 nm ultraviolet light, the phosphors exhibited strong green emission characteristics. Analysis of the emission spectra of different concentration of samples determined that the optimal doping concentration is x = 0.04, at which the samples exhibit the best luminescent performance. Additionally, these samples demonstrated high thermal stability, at 453 K, the luminous intensity retains 88.3% of its initial value at room temperature. The research results suggest that Sr₂Ga₂SiO₇:Tb3⁺ green phosphors have significant application potential, particularly in addressing the narrow emission spectrum limitations of conventional WLEDs and fluorescence-based marking technologies.

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Resonantly driven nonlinear dynamics of soliton molecules in ultrafast fiber lasers

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Advanced Photonics 2025年第1期7卷 41-51页

作者： Defeng Zou Runmin Liu Yanqing Shi Aoyan Zhang Jialong Li Gina Jinna Chen Hong Dang Youjian Song Minglie Hu Perry Ping Shum Southern University of Science and Technology State Key Laboratory of Optical Fiber and Cable Manufacture TechnologyGuangdong Key Laboratory of Integrated Optoelectronics IntellisenseDepartment of EEEShenzhenChina Tianjin University School of Precision Instruments and Opto-electronics EngineeringUltrafast Laser LaboratoryState Key Laboratory of Precision Measurement Technology and InstrumentsTianjinChina Pengcheng Laboratory ShenzhenChina

Recent years have seen significant advances in the study of dissipative soliton molecules in ultrafast lasers, driven by their remarkable connections to a wide range of physical systems. However, understanding and controlling the underlying physics of soliton molecules remain elusive due to the absence of a universal physical model that adequately describes intramolecular motion. We demonstrate that resonant excitation generates breather soliton molecules, with their resonance susceptibility exhibiting high amplitude-driven operations that can be well understood within the framework of the Duffing model. Harnessing powerful experiment techniques and detailed numerical simulations, we reveal the fundamental resonant mode within intrapulse separation constrained to the 100 fs level as well as the presence of the subharmonic and overtones. Additionally, we observe chaotic dynamics arising from the multiple-frequency nonlinear interactions in a strongly dissipative regime. Our work provides a perspective on the complex interactions of dissipative optical solitons through the lens of nonlinear physics. This approach offers a simple test bed for complex nonlinear physics research, with ultrafine scanning of temporal separations of ultrashort laser pulses demonstrating significant potential for applications requiring high detection sensitivity.

关键词： nonlinear dynamics resonant excitation soliton molecules balanced optical cross correlation ultrafast lasers Duffing model

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Target extraction based on hybrid domain features of array GM-APD lidar 10

Target extraction based on hybrid domain features of array G...

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10th Symposium on Novel optoelectronic Detection technology and Applications

作者： Zhang, Xin Li, Sining Sun, Jianfeng Jiang, Peng Jin, Haowei National Key Laboratory of Laser Spatial Information Institute of Opto-Electronic Harbin Institute of Technology Heilongjiang Harbin150001 China Zhengzhou Research Institute of Harbin Institute of Technology Henan Zhengzhou450000 China National Key Laboratory of Complex System Control and Intelligent Agent Cooperation Beijing100074 China

ISBN: (数字)9781510688155

ISBN: (纸本)9781510688148

This study proposes a target extraction algorithm for array GM-APD lidar based on hybrid domain features, designed to address the challenges of accurately extracting target region based on the image in complex scenes and high noise interference. We extracted the temporal features of the echo signals and transformed the echo signals into the image domain to enhance the information content and further extract image features. By integrating multi-view K-means clustering and AdaBoost classification methods, we introduced a dynamic weight adjustment mechanism and a region adjustment method based on a correlation coefficient to achieve pixel-type discrimination and target region extraction. Experimental results demonstrate that the proposed method exhibits good robustness and adaptability in complex detection environments. Under conditions of different occlusion, different signal-to-noise ratios, and different target reflectivity, the proposed algorithm significantly outperforms traditional region-growing segmentation methods in terms of accuracy of target region extraction. © 2025 SPIE.

关键词： K-means clustering

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Dual-Broadband Vertically Polarized Omnidirectional Antenna with Low Profile

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IEEE Antennas and Wireless Propagation Letters 2025年第5期24卷 1085-1089页

作者： Deng, Ming Yang Huang, Li Neng Shao, Weiheng Ye, Liang Hua Li, Jian-Feng Guangdong University of Technology School of Physics and Optoelectronic Engineering Guangzhou510006 China Guangzhou510610 China School of Micro-electronics Guangzhou510640 China Guangdong University of Technology Guangdong Provincial Key Laboratory of Sensing Physics and System Integration Applications Guangzhou510006 China

A dual-broadband vertically polarized omnidirec-tional patch antenna with simple low-profile structure is proposed for mobile communication. The design is formed by a wheel-shaped patch, a circular ground reflector, four arc-shaped strips, four feeding pins, eight shorting pins and a 1-to-4 power divider. The wheel-shaped patch, connected to the ground reflector by eight shoring pins, is fed by the 1-to-4 power divider to generate four TM01 or TM02 resonant modes. Then four arc-shaped strips are embedded in the wheel-shaped patch to generate an extra TM01 resonant mode. Based on the new scheme, five resonant modes are inspired to form two wide frequency bands. The proposed antenna exhibits dual broad bandwidths of 38.6% (1.63-2.41 GHz) and 47.4% (3.17-5.14 GHz). Additionally, the proposed design has a simply two-layer structure and a thin profile of 0.058λL, where λL represents the free-space wavelength at the lowest operating band, which makes it suitable for indoor mobile communication systems within the bands of GSM1800/IMT2000/ LTE2300 and 5G NR 78/79. © 2002-2011 IEEE.

关键词： Omnidirectional antennas

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