We present design and experimental validation of the system for the generation of the Orbital Angular Momentum (OAM) states using 3D-printed low-loss metamaterial phase plates for application in the terahertz (THz) wireless communications. By azimuthally varying the hole pattern density within the phase plate, the local effective refractive index is varied, thus also changing the local propagation constant in the azimuthal direction. The OAM of any topological charge can be created by simply varying the thickness of the phase plate. The phase plate with topological charge (m=1) is 3D printed and the amplitude and the phase of the terahertz signal after passing the plate is characterized using the THz-time domain imaging system. Finally, we present the experimental setup and theoretical simulation on the multiplexing and de-multiplexing of several different OAM states for applications in wireless terahertz communication.
Resonant tunneling diode-integrated terahertz transceiver module for wireless communications
Graduate School of Engineering Science, The University of Osaka（大阪大学工学研究科）；Terahertz Engineering Laboratory, Adelaide University（阿德莱德大学太赫兹工程实验室）；Osaka Research Institute of Industrial Science and Technology（大阪产业技术综合研究所）；ROHM Co. Ltd.（罗姆有限公司）；Graduate School of Science, The University of Tokyo（东京大学理学研究科）
Carrier conversion from terahertz wave to dual-wavelength near-infrared light injection-locking to optical comb using asynchronous nonpolarimetric electro-optic downconversion with electro-optic polymer modulator
All-photonic W-band terahertz receiver based on THz-to-optical carrier conversion with soliton microcomb dual carriers for high-speed OOK wireless transmission
Graduate School of Sciences and Technology for Innovation, Tokushima University（德岛大学科学技术研究生院）；Institute of Post-LED Photonics (pLED), Tokushima University（德岛大学后LED光子学研究所）；Institute of Photonics and Human Health Frontier (IPHF), Tokushima University（德岛大学光子学与人类健康前沿研究所）；Center for Higher Education and Digital Transformation, University of Yamanashi（山梨大学高等教育与数字化转型中心）；National Institute of Information and Communications Technology（信息通信技术研究所）；Department of Electrical, Electronic and Computer Engineering, Gifu University（岐阜大学电气电子计算机工程系）；Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology（名古屋工业大学电气机械工程系）
Inverse Design of Integrated Terahertz Vortex Beam Emitters with Staged-Annealing Topology Optimization
Innovative Institute of Electromagnetic Information and Electronic Integration, College of Information Science & Electronic Engineering, Zhejiang University（浙江大学信息与电子工程学院电磁信息与电子集成创新研究院）；State Key Laboratory of Extreme Photonics and Instrumentation, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University（浙江大学极端光子与仪器化学州全球科技创新中心国家重点实验室）；International Joint Innovation Center, The Electromagnetics Academy at Zhejiang University, Zhejiang University（浙江大学电磁学研究院国际联合创新中心）；Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, Jinhua Institute of Zhejiang University, Zhejiang University（浙江大学金华研究院浙江省先进微纳电子器件与智能系统重点实验室）
Wireless data transmission in a 560-GHz band using low-phase-noise terahertz wave generated by photomixing of a pair of distributed feedback lasers injection-locking to Kerr micro-resonator soliton comb
