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3rd IEEE International Conference on Electronic information and Communication Technology, ICEICT 2020

作者： Zeng, Ting Deng, Li Li, Shufang Feng, Botao Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China College of Electronics and Information Engineering Shenzhen University Shenzhen China

ISBN: (纸本)9781728190457

A reflection metasurface that can generate non-diffraction Bessel beams and achieve anomalous reflection with high efficiency at 5.8 GHz is proposed in this paper. The unit it utilizes has excellent amplitude and phase characteristics, greatly facilitating the construction of the proposed metasurface and laying a solid foundation for the improvement of efficiency. According to non-diffraction theory and anomalous reflection law, two metasurfaces are designed for comparison. The simulation results show that the designed metasurfaces successfully realize the non-diffractive beam with a focusing distance of 126 mm (2.44 λ0), and can bend the normally reflected wave to the direction 10° from the +z direction in a vertical plane 45° away from the +x direction. The average efficiency of the metasurface within the focusing range is as high as 84.5%, thus could be used as radio energy transmission, telecommunication multiplexing and accurate detection devices. © 2020 IEEE.

关键词： Diffraction

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An One-dimensional Holographic Antenna for RFID Reader 3

An One-dimensional Holographic Antenna for RFID Reader

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3rd IEEE International Conference on Electronic information and Communication Technology, ICEICT 2020

作者： Ren, Xiaokui Deng, Li Li, Shufang Zhang, Chen Feng, Botao Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China College of Electronics and Information Engineering Shenzhen University Shenzhen China

A one-dimensional holographic metasurface antenna that can achieve full-angle symmetrical dual-beam rapid scanning while keeping its position unchanged is proposed. The principle of holographic antenna and beam deflec... 详细信息

ISBN: (纸本)9781728190457

关键词： Holography

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Reflective Metasurface for Controlling the Beam Divergence Angles of Dual-mode OAM Waves 3

Reflective Metasurface for Controlling the Beam Divergence A...

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3rd IEEE International Conference on Electronic information and Communication Technology, ICEICT 2020

作者： He, Xiaoyuan Deng, Li Feng, Botao Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture Convergence Beijing University of Posts and Telecommunications Beijing China College of Electronics and Information Engineering Shenzhen University Shenzhen China

ISBN: (纸本)9781728190457

For dealing with the problem of receiving multimode orbital-angular momentum (OAM) waves resulting from different beam divergence angles of OAM waves with different topological charges, it is essential to control the beam divergence angles of OAM waves. In this paper, a method is proposed to control the beam divergence angles of multi-mode OAM waves without modifying the inherent topological charges by a reflective metasurface. Based on this method, a reflective metasurface is properly designed to generate dual-mode OAM waves with equal beam divergence angle. As a dual-mode OAM waves generator, the reflective metasurface is composed of 31x31 metal-insulator-metal elements which is capable to manipulate dual-polarized electromagnetic waves (EMWs) independently. Furthermore, as a beam divergence controller, the reflective metasurface is properly divided into two regions that are responsible for +1 mode and +3 mode OAM waves generations. In this way, dual-mode OAM waves with equal beam divergence angle can be generated by the proposed reflective metasurface. The proposed design provides an efficient technology to control the beam divergence angles of multi-mode OAM waves flexibly, which is conductive to simplify the receiving device in OAM based communication systems. © 2020 IEEE.

关键词： Topology

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Use OFDM in OAM Communication to Redcuce Multi-path Effects 3

Use OFDM in OAM Communication to Redcuce Multi-path Effects

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3rd IEEE International Conference on Electronic information and Communication Technology, ICEICT 2020

作者： Shu, Jingyue Deng, Li Li, Shufang Feng, Botao Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture Convergence Beijing University of Posts and Telecommunications Beijing China College of Electronics and Information Engineering Shenzhen University Shenzhen China

ISBN: (纸本)9781728190457

The orbital angular momentum (OAM) has raised great attention for its potential to enhance the capacity of wireless communication system. The performance of OAM communication is dependent on the accuracy of phase information. In multi-path channel, the accuracy is destroyed. In this paper, we use orthogonal frequency division multiplexing (OFDM)before OAM modulation to enhance communication performance. © 2020 IEEE.

关键词： Orthogonal frequency division multiplexing

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A new quantum machine learning algorithm: split hidden quantum Markov model inspired by quantum conditional master equation

arXiv

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arXiv 2023年

作者： Li, Xiao-Yu Zhu, Qin-Sheng Hu, Yong Wu, Hao Yang, Guo-Wu Yu, Lian-Hui Chen, Geng School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu610054 China School of Physics University of Electronic Science and Technology of China Chengdu610054 China Advanced Cryptography and System Security Key Laboratory of Sichuan Province Chengdu610103 China Institute of Electronics and Information Industry Technology of Kash Kash 844000 China School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China

The Hidden Quantum Markov Model (HQMM) has significant potential for analyzing time-series data and studying stochastic processes in the quantum domain as an upgrading option with potential advantages over classical Markov models. In this paper, we introduced the split HQMM (SHQMM) for implementing the hidden quantum Markov process, utilizing the conditional master equation with a fine balance condition to demonstrate the interconnections among the internal states of the quantum system. The experimental results suggest that our model outperforms previous models in terms of scope of applications and robustness. Additionally, we establish a new learning algorithm to solve parameters in HQMM by relating the quantum conditional master equation to the HQMM. Finally, our study provides clear evidence that the quantum transport system can be considered a physical representation of HQMM. The SHQMM with accompanying algorithms present a novel method to analyze quantum systems and time series grounded in physical implementation. © 2023, CC BY-NC-SA.

关键词： Stochastic systems

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Tunable narrow-band single-channel add-drop integrated optical filter with ultrawide FSR

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PhotoniX 2022年第1期3卷 312-323页

作者： Chunlei Sun Yuexin Yin Zequn Chen Yuting Ye Ye Luo Hui Ma Lichun Wang Maoliang Wei Jialing Jian Renjie Tang Hao Dai Jianghong Wu Junying Li Daming Zhang Hongtao Lin Lan Li Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University2699 Qianjin StreetChangchun 130012China Key Laboratory of Micro-Nano Electronics and Smart System of Zhejiang Province College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China School of Microelectronics Zhejiang UniversityHangzhou 310027China.

Free-spectral-range(FSR)-free optical filters have always been a critical challenge for photonic integrated circuits.A high-performance FSR-free filter is highly desired for communication,spectroscopy,and sensing *** significant progress in integrated optical filters,the FSR-free filter with a tunable narrow-band,high out-of-band rejection,and large fabrication tolerance has rarely been *** this paper,we propose an exact and robust design method for add-drop filters(ADFs)with an FSR-free operation capability,a sub-nanometer optical bandwidth,and a high out-of-band rejection(OBR)*** achieved filter has a 3-dB bandwidth of<0.5 nm and an OBR ratio of 21.5 dB within a large waveband of 220 nm,which to the best of our knowledge,is the largest-FSR ADF demonstrated on a silicon photonic *** filter exhibits large tunability of 12.3 nm with a heating efficiency of 97 pm/mW and maintains the FSR-free feature in the whole tuning *** addition,we fabri-cated a series of ADFs with different periods,which all showed reliable and excellent performances.

关键词： Integrated devices Silicon photonics Optical filters FSR-free filters Tunable filters

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Detection of N-Propanol Down to Sub-Ppm Level Using P-Type Delafossite AgCrO2 Nanoparticles

SSRN

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SSRN 2022年

作者： Li, Wentao Kong, Lingwei Li, Xifeng Zhu, Wenhuan Zhang, Jianhua Liu, Hai Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University 149 Yanchang Road Shanghai200072 China Department of Micro/Nano Electronics School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai200240 China

As an important biomarker of lung cancer, n-propanol at sub-ppm level is still challenging to be detected for a simple and immediate early diagnose. In this work, a new n-propanol gas sensor with an ultralow detection limit down to 100 ppb is presented using AgCrO2 nanoparticles synthesized by a simple hydrothermal method. Compared with the congeneric CuCrO2 and commercial SnO2 , AgCrO2 exhibits prevailing performances, including a higher selectivity, dynamic response, logarithmical linearity, but lower working temperature. The first principles calculation and the energy band theoretical analysis are combined to elucidate the sensing mechanism, in which the chemical adsorption of gaseous molecules to the silver followed by the dehydrogenation on chromium on the surface of AgCrO2 is responsible to the outstanding susceptibility towards n-propanol. The proposed metal oxide semiconductor gas sensor capable of sub-ppm n-propanol detection provides a route to design and optimize the sensitive material system for the advanced trace detection of the volatile organic compounds. © 2022, The Authors. All rights reserved.

关键词： Volatile organic compounds

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Ray-Tracing Calibration Based on Improved Particle Swarm Optimization in 5.9 GHz Outdoor Scenario

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IEEE Antennas and Wireless Propagation Letters 2025年

作者： Li, Zhuoyin He, Ruisi Yang, Mi Qi, Ziyi Zhang, Zhong Ai, Bo Zhang, Haoxiang Han, Jiahui Fan, Jianhua Beijing Jiaotong University State Key Laboratory of Advanced Rail Autonomous Operation the School of Electronics and Information Engineering the Frontiers Science Center for Smart High-speed Railway System Beijing100044 China Master Planning Institute of China Academy of Industrial Internet Ministry of Industry and Information Technology of the People's Republic of China Beijing100804 China National University of Defense Technology Sixty-third Research Institute Nanjing210007 China

Ray-tracing (RT) channel simulation has been widely used for simulating and analyzing propagation of electromagnetic waves in complex environments. The electrical properties of materials play a critical role in RT simulation accuracy and calibration of material is usually required. However, the traditional calibration methods for electrical parameters, such as the genetic algorithm and simulated annealing algorithm, suffer from slow convergence and limited parallelism, making them less suitable for complex scenarios with diverse material categories. This article presents a novel approach for automatic parameter optimization based on particle swarm optimization (PSO) algorithm. The proposed method leverages fast convergence advantage of the PSO algorithm. It incorporates a linearly-varying strategy to gradually reduce inertia weight, and enhances algorithm local search capability. Additionally, random perturbation factors are employed to reassign particles exceeding boundaries, preventing them from being trapped in local optima. Measurements and calibration of 5.9 GHz outdoor channels demonstrate the method, which achieves fairly high accuracy. © 2002-2011 IEEE.

关键词： Channel simulation electromagnetic parameter calibration particle swarm optimization ray-tracing simulation

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Free-spectral-range-free filters with ultrawide tunability across the S+C+L band

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Photonics Research 2021年第6期9卷 1013-1018页

作者： CHUNLEI SUN CHUYU ZHONG MAOLIANG WEI HUI MA YE LUO ZEQUN CHEN RENJIE TANG JIALING JIAN HONGTAO LIN LAN LI Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024China Key Laboratory of Micro-Nano Electronics and Smart System of Zhejiang Province College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China School of Microelectronics Zhejiang UniversityHangzhou 310027China

Optical filters are essential parts of advanced optical communication and sensing *** them,the ones with an ultrawide free spectral range(FSR)are especially *** are promising to provide access to numerous wavelength channels highly desired for large-capacity optical transmission and multipoint multiparameter *** schemes for wide-FSR filters either suffer from limited cavity length or poor fabrication tolerance or impose an additional active-tuning control *** theoretically and experimentally demonstrate a filter that features FSR-free operation capability,subnanometer optical bandwidth,and acceptable fabrication *** one single deep dip within a record-large waveband(S+C+L band)is observed by appropriately designing a side-coupled Bragg-grating-assisted Fabry–Perot filter,which has been applied as the basic sensing unit for both the refractive index and temperature *** such basic units are also cascaded in series to demonstrate a multichannel *** work provides a new insight to design FSR-free filters and opens up a possibility of flexible large-capacity integration using more wavelength channels,which will greatly advance integrated photonics in optical communication and sensing.

关键词： free desired insight

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SRS-Net: a universal framework for solving stimulated Raman scattering in nonlinear fiber-optic systems by physics-informed deep learning

Communications Engineering

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Communications engineering 2024年第1期3卷 109页

作者： Song, Yuchen Zhang, Min Jiang, Xiaotian Zhang, Fan Ju, Cheng Huang, Shanguo Lau, Alan Pak Tao Wang, Danshi State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing 100876 China State Key Laboratory of Advanced Optical Communication System and Networks Frontiers Science Center for Nano-optoelectronics School of Electronics Peking University Beijing 100871 China College of Electronic Information College of Electronic Information Qingdao University Qingdao 266071 China Photonics Research Institute Department of Electrical Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong

As a crucial nonlinear phenomenon, stimulated Raman scattering (SRS) plays multifaceted roles involved in forward and inverse problems. In fibre-optic systems, these roles range from detrimental interference that impairs optical performance to beneficial effects that enables various devices such as Raman amplifier. To obtain solutions of SRS, various numerical methods customized for different scenarios have been proposed. However, these methods are time-consuming, low-efficiency, and experience-orientated, particularly in combined scenarios consisting of both forward and inverse problems. Inspired by physics-informed neural networks, we propose SRS-Net, which combines the efficient automatic differentiation and powerful representation ability of neural networks with the regularization of SRS physical laws, to obtain universal solutions for SRS of forward, inverse, and combined problems. We showcase the intuitive solving procedure and high-speed performance of SRS-Net through extensive simulations covering different scenarios. Additionally, we validate its capabilities in experiments involving the high-fidelity modelling of a wavelength division multiplexing system spanning the C + L-band with approximately 10 THz. The versatility of the SRS-Net framework extends beyond SRS, indicating its potential as a promising universal solution in other engineering problems with nonlinear dynamics governed by partial differential equations. © The Author(s) 2024.

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