Results 71 to 80 of about 36,720 (261)

A terahertz grid frequency doubler [PDF]

, 1998
We present a 144-element terahertz quasi-optical grid frequency doubler. The grid is a planar structure with bow-tie antennas as a unit cell, each loaded with a planar Schottky diode.
Alina Moussessian, David B. Rutledge, Jung-Chih Chiao, Michael C. Wanke, S. James Allen, Senior Member, Thomas W. Crowe, Yongjun Li   +7 more
core   +2 more sources

Decoding THz‐Driven Dynamic Fingerprints of Ferroelectric Nanotwin Networks

Advanced Materials, EarlyView.
ABSTRACT Ultrafast polarization dynamics in ferroelectrics are of considerable interest for high‐speed tunable dielectrics and electro‐optics. Extended domain wall networks formed in ferroelectric twin nanodomains can support collective dynamics in the terahertz regime but require techniques that track polarization and strain evolution driven by ...
Xiaojiang Li, Aiden Ross, Vladimir A. Stoica, Sujit Das, Sankalpa Hazra, Huaiyu (Hugo) Wang, Hari Padma, Matthias C. Hoffmann, Patrick Kramer, Sanghoon Song, Silke Nelson, Takahiro Sato, Diling Zhu, Ramamoorthy Ramesh, Lane W. Martin, Yue Cao, John W. Freeland, Aaron M. Lindenberg, Haidan Wen, Long‐Qing Chen, Venkatraman Gopalan   +20 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

CEP-stable Tunable THz-Emission Originating from Laser-Waveform-Controlled Sub-Cycle Plasma-Electron Bursts [PDF]

, 2015
We study THz-emission from a plasma driven by an incommensurate-frequency two-colour laser field. A semi-classical transient electron current model is derived from a fully quantum-mechanical description of the emission process in terms of sub-cycle field-
Baltuška, A., Balčiūnas, T., Darmo, J., Dietze, D., Haessler, S., Ivanov, M., Lorenc, D., Paulus, G., Rathje, T., Smirnova, O., Unterrainer, K., Zheltikov, A. M.   +11 more
core   +4 more sources

Hyperuniform disordered terahertz quantum cascade laser [PDF]

Scientific Reports, 2016
AbstractLaser cavities have been realized in various different photonic systems. One of the forefront research fields regards the investigation of the physics of amplifying random optical media. The random laser is a fascinating concept because, further to the fundamental research investigating light transport into complex media, it allows us to obtain
R Degl' Innocenti, Y D Shah, L Masini, A Ronzani, A Pitanti, Y Ren, D S Jessop, A Tredicucci, H E Beere, D A Ritchie   +9 more
openaire   +6 more sources

Electronic Structure Reorganization in MPS3 via d‐Shell‐Selective Alkali Metal Doping

Advanced Science, EarlyView.
Alkali metal doping of layered MPS3 antiferromagnets reveals d‐shell‐selective responses. While MnPS3 resists charge transfer due to its half‐filled 3d5 shell, FePS3 and NiPS3 behave similarly to CoPS3 by accommodating extra d‐electrons. Yet only CoPS3, with its least stable d‐shell, undergoes pronounced band restructuring and a semiconducting‐to ...
Jonah Elias Nitschke, Preeti Bhumla, Till Willershausen, Patrick Merisescu, David Maximilian Janas, Lasse Sternemann, Michael Gutnikov, Karl Schiller, Valentin Mischke, Michele Capra, Mira Sophie Arndt, Silvana Botti, Mirko Cinchetti   +12 more
wiley   +1 more source

Efficiently Laser Driven Terahertz Surface Plasmon Polaritons on Long Metal Wire

Physical Review X
We experimentally demonstrate a novel scheme for efficiently generating intense terahertz surface plasmon polaritons (SPPs) on a subwavelength-diameter meter-long metal wire.
Shuo-ting Shao, Xiang-bing Wang, Rong Huang, Guang-yue Hu, Min Chen, Hui-bo Tang, Long-yu Kuang, Yu-xi Liu, Yu-qiu Gu, Yong-kun Ding, Hong-bin Zhuo, Ming-yang Yu   +11 more
doaj   +1 more source

Enhancing the stability of a continuous-wave terahertz system by photocurrent normalization

, 2013
In a continuous-wave terahertz system based on photomixing, the measured amplitude of the terahertz signal shows an uncertainty due to drifts of the responsivities of the photomixers and of the optical power illuminating the photomixers.
Deninger, A., Grüninger, M., Güsten, R., Hemberger, J., Langenbach, M., Mayorga, I. Camara, Roggenbuck, A., Schmitz, H., Thirunavukkuarasu, K.   +8 more
core   +1 more source

Laser‐Induced Ultrafast Magnetic Phase Transition in 2D Van Der Waals Antiferromagnetic Heterostructures

Advanced Science, EarlyView.
In this work, ultrafast laser‐induced spin transfer and spin relaxation dynamics in 2D van der Waals antiferromagnetic CrI3/CrGeTe3 heterostructures are investigated. Laser excitation is demonstrated to induce pronounced interlayer nonequilibrium spin dynamics and ultrafast magnetic moment reconstruction, driving a transition from an antiferromagnetic (
Yang Wu, Fulu Zheng, San‐Dong Guo, Thomas Frauenheim, Zhaobo Zhou, Junjie He   +5 more
wiley   +1 more source

Effects of excitation frequency on high-order terahertz sideband generation in semiconductors

, 2013
We theoretically investigate the effects of the excitation frequency on the plateau of high-order terahertz sideband generation (HSG) in semiconductors driven by intense terahertz (THz) fields.
Liu, Ren-Bao, Xie, Xiao-Tao, Zhu, Bang-Fen   +2 more
core   +1 more source