Results 111 to 120 of about 219,971 (340)

Microwave Absorption for Detection of Dirac Fermions in SnTe Films

Advanced Materials Interfaces, EarlyView.
Microwave absorption can detect Dirac fermions in samples exposed to the atmosphere. Results showed that although topological surface states are robust against environmental degradation, they are not detectable by electrical transport measurements. Hence, microwave absorption can detect Dirac fermions even in samples whose surfaces have deteriorated ...
Wellington P. do Prado, Jorge A. Navarro‐Giraldo, Muhammad Tahsin, Vinicius T. Santana, Eduardo Abramof, Paulo H. O. Rappl, Suelen de Castro, Marcelos L. Peres, Petr Neugebauer   +8 more
wiley   +1 more source

Numerical analysis of temperature-controlled terahertz power splitter

Journal of the European Optical Society-Rapid Publications, 2017
Background As a significant terahertz functional device, terahertz beam splitters with high performance are highly required to meet the need for terahertz communication, terahertz image, and terahertz sensor systems.
Li Yang, Li Jiu-Sheng
doaj   +1 more source

THz Measurement Systems

, 2016
The terahertz (THz) frequency region is often defined as the last unexplored area of the electromagnetic spectrum. Over the past few years, the full access has been the objective of intense research efforts. Progress in this area has played an important role in opening up the possibility of using THz electromagnetic radiation (T-waves) in science and ...
Andreone Antonello, Angrisani Leopoldo, Liccardo Annalisa, Cavallo Giovanni, Papari Gianpaolo   +4 more
openaire   +3 more sources

High‐Sensitivity Terahertz Gas Sensing Enabled by Undercut Metal‐Dielectric‐Metal Metamaterial

Advanced Materials Interfaces, EarlyView.
A terahertz (THz) metamaterial gas sensor is demonstrated using a metal–dielectric–metal (MDM) absorber with an undercut dielectric layer, which enlarges the gas‐replaced volume and strengthens refractive‐index perturbation of the resonant mode. A reflection dip at 0.766 THz is observed, and acetone–nitrogen tests yield concentration‐dependent shifts ...
Naoki Inomata, Yuki Sakai, Yoshiaki Kanamori   +2 more
wiley   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

A Review of THz Modulators with Dynamic Tunable Metasurfaces

Nanomaterials, 2019
Terahertz (THz) radiation has received much attention during the past few decades for its potential applications in various fields, such as spectroscopy, imaging, and wireless communications.
Lan Wang, Yaxin Zhang, Xiaoqing Guo, Ting Chen, Huajie Liang, Xiaolin Hao, Xu Hou, Wei Kou, Yuncheng Zhao, Tianchi Zhou, S. Liang, Ziqiang Yang   +11 more
semanticscholar   +1 more source

Multi‐Mode Deep Strong Coupling in a Multi Quantum Well Fabry–Perot Cavity

Advanced Optical Materials, EarlyView.
Multi‐mode deep‐strong coupling is demonstrated in a 166‐well heterostructure that acts as a Fabry–Perot cavity. Even cavity modes couple strongly to the cyclotron resonance, producing large vacuum Rabi splittings and a rich polaritonic spectrum captured by a full Hopfield model.
Lucy Hale, Johan Andberger, Ethan Koskas, Frieder Lindel, Mattias Beck, Giacomo Scalari, Jérôme Faist   +6 more
wiley   +1 more source

A Small Planar Antenna for 4G Mobile Phone Application

International Journal of Antennas and Propagation, 2016
The analysis and design of a small planar multiband antenna operating in the 4G frequency bands are presented. The numerical and experimental results demonstrated that the proposed antenna satisfies the requirement of 6 dB return loss for the impedance ...
Hu Jian-rong, Li Jiu-sheng, Wu Di
doaj   +1 more source

Terahertz switch based on waveguide structures [PDF]

AIP Advances
We propose a terahertz switch based on nonlinear materials, which consists of a straight-through waveguide and two micro-ring waveguides with a concentric circle structure.
Feng-lei Guo, Jiu-sheng Li, Yu-xin Zhai
doaj   +1 more source

Ultra-wideband THz/IR Metamaterial Absorber based on Doped Silicon

, 2018
Metamaterial-based absorbers have been extensively investigated in the terahertz (THz) range with ever increasing performances. In this paper, we propose an all-dielectric THz absorber based on doped silicon.
Danhua Peng, Fangjing Hu, Huafeng Liu, Kai Luo, Liangcheng Tu, Shihao Tang   +5 more
core   +1 more source