Results 51 to 60 of about 439,540 (206)

Broadband Image-Reject Mixing Based on a Polarization-Modulated Dual-Channel Photonic Microwave Phase Shifter

IEEE Photonics Journal, 2020
Broadband image-reject mixing using a dual-channel polarization-modulated photonic microwave phase shifter is proposed and experimentally demonstrated.
Yamei Zhang, Zhaoyu Li, Wenjuan Chen, Ce Liu, Kunlin Shao, Dan Zhu, Shilong Pan   +6 more
doaj   +1 more source

Microwave Photonic Links and Transversal Microwave Photonic Applications

Electromagnetic Science
With the help of photonic techniques, microwave photonic links (MPLs) have remarkable advantages in terms of generating, transmitting, and processing analog or microwave signals with high frequency or wide bandwidth relative to traditional electrical systems, which have been widely and deeply researched over the past few decades.
Yunping Bai, Zhihui Liu, Mengmeng Duan, Jiaxue Feng, Xixi Xiong, Kelei Wei, Kainan Wu, Xiyao Jia, Ruilin Liao, Yuhang Song, Edwin Yue Bun Pun, Sha Zhu, Xingyuan Xu, Ning Hua Zhu, Kun Xu   +14 more
openaire   +2 more sources

Short and Length‐Independent Group Delay Supported by Topological Edge States in Finite‐Size Su–Schrieffer–Heeger Chains

Advanced Materials Technologies, EarlyView.
This study demonstrates short, length‐independent group delay supported by topological edge states in open Su–Schrieffer–Heeger networks. Strong boundary port coupling enables an order‐of‐magnitude latency reduction compared to bulk modes, alongside robust protection against bulk disorder.
Yu‐Han Chang, Nadia Daniela Rivera Torres, Santiago Figueroa Manrique, Raul A. Robles Robles, Vanna Chrismas Silalahi, Cen‐Shawn Wu, Gang Wang, Giulia Marcucci, Laura Pilozzi, Claudio Conti, Ray‐Kuang Lee, Watson Kuo   +11 more
wiley   +1 more source

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Advances and Perspectives in Graphene‐Based Quantum Dots Enabled Neuromorphic Devices

Advanced Science, EarlyView.
Graphene‐based QDs are zero‐dimensional carbon nanomaterials with pronounced quantum confinement and tunable electronic structures. Herein, we summarize their synthesis strategies and functionalization methods, and highlight their functional roles and operating mechanisms in devices, as well as recent advances in neuromorphic electronics. We anticipate
Yulin Zhen, Wei Zeng, Zherui Zhao, JiYu Zhao, Ziyan Huang, Zhuo Chen, Kui Zhou, Guanglong Ding, Su‐Ting Han, Ye Zhou   +9 more
wiley   +1 more source

Large-scale integrated optoelectronic chaos for machine learning acceleration

Nature Communications
Chaos has emerged as a useful resource for machine learning, yet traditional nonlinear circuits face speed bottlenecks. Optical chaos sources offer an attractive alternative with ultra-wideband operation and massive parallelism, but existing schemes must
Zhouyang Pan, Zhekai Zheng, Ping Li, Hao Wang, Jiacheng Guo, Ding Cui, Zhihui Li, Jiaqi Shen, Lihan Wang, Mengya Zong, Simin Li, Zhe Kang, Yue Yuan, Jianqi Hu, Jijun He, Yuxin Liang, Dan Zhu, Shilong Pan   +17 more
doaj   +1 more source

Retina‐Inspired Bi‐Based Terahertz Photonic Neuromorphic Devices

Advanced Science, EarlyView.
Combined with effective band alignment and substrate engineering, bismuth materials are introduced to form terahertz photonic bio‐inspired devices with picosecond short‐term plasticity to enable multi‐scene visual perception. Thus obtained hardware through the terahertz optical neural network (THz‐ONN) demonstrates high recognition accuracy, providing ...
Pujing Zhang, Donggang Xie, Longyu Shi, Mengyuan Wang, Huiwen Shi, Yu Wu, Menglei Li, Guangwei She, Peijie Wang, Wensheng Shi, Cunlin Zhang, Kuijuan Jin, Guozhen Yang, Qingli Zhou, Chen Ge   +14 more
wiley   +1 more source

Design and Optimization of Highly Miniaturized Liquid Crystal Phase Shifters Based on Defected Ground Structures

IEEE Journal of Microwaves
This paper presents a fast and compact design method for planar liquid crystal (LC) phase shifters, using circuit models based on filter design principles.
Robin Neuder, Marc Spath, Martin Schubler, Alejandro Jimenez-Saez   +3 more
doaj   +1 more source

Symmetry‐Imposed Selection Rules for Excitations of Nontrivial Plasmonic Topologies

Advanced Science, EarlyView.
A unified group‐theory selection rule governs the excitation of vectorial nearfield topologies across three plasmonic spin states. Derived from first principles, it predicts spin–orbit vortex splitting and multidimensional nested vortices, confirmed by phase‐resolved in situ measurements.
Jie Yang, Pengyi Feng, Fei Han, Weijin Chen, Zhongwei Jin, Jincheng Ni, Yuanjie Yang, Anxue Zhang, Guy A. E. Vandenbosch, Niels Verellen, Ewald Janssens, Jiafu Wang, Benfeng Bai, Cheng‐Wei Qiu, Xuezhi Zheng   +14 more
wiley   +1 more source

The Boston University Photonics Center annual report 2010-2011 [PDF]

, 2011
This repository item contains an annual report that summarizes activities of the Boston University Photonics Center in the 2010-2011 academic year. The report provides quantitative and descriptive information regarding photonics programs in education ...
The Boston University Photonics Center
core   +1 more source