Results 81 to 90 of about 2,058,874 (276)

Four-wave mixing and generation of terahertz radiation in an alternating-strain coupled quantum-well structure [PDF]

, 1996
We propose a scheme for exciting steady-state tunneling oscillations of an electronic wave packet in a semiconductor coupled quantum-well structure with strain of the opposite polarity in the two wells. A detailed study of the four-wave mixing process in
Paiella, Roberto, Vahala, Kerry J.
core   +1 more source

3D Anodic Alumina Nanoarchitectures: A Decade of Progress from Foundational Science to Functional Metamaterials

Advanced Materials, EarlyView.
Ordered three‐dimensional anodic aluminum oxide (3D‐AAO) nanoarchitectures with longitudinal and transverse pores enable architecture‐driven metamaterials. The review maps fabrication advances, including hybrid pulse anodization, and shows how 3D‐AAO templates tailor properties across magnetism, energy, catalysis, and sensing.
Marisol Martín‐González
wiley   +1 more source

Generation of powerful terahertz emission in a beam-driven strong plasma turbulence

, 2012
Generation of terahertz electromagnetic radiation due to coalescence of upper-hybrid waves in the long-wavelength region of strong plasma turbulence driven by a high-current relativistic electron beam in a magnetized plasma is investigated.
A V Arzhannikov, Arzhannikov A V, Arzhannikov A V, I V Timofeev, Kruchina E N, Vyacheslavov L N   +5 more
core   +1 more source

High Charge Carrier Mobility in Non‐Conjugated 3D Covalent Organic Frameworks

Advanced Materials, EarlyView.
A non‐conjugated 3D COF constructed via boronate ester linkages from tetraphenylene and pyrene‐based monomers is reported, which exhibits a high charge carrier mobility of 14 ± 1 cm2 V−1 s−1. ABSTRACT π‐Conjugation, π–π stacking, and long‐range order play a central role in determining charge transport efficiency in organic materials.
Joaquín Almarza, Karol Strutyński, Shuai Fu, Yifan Chen, Natalia M. Padial, Isabel del Barrio Gómez, Carlos Martí‐Gastaldo, Andrei N. Khlobystov, Mischa Bonn, Hai I. Wang, Manuel Melle‐Franco, Aurelio Mateo‐Alonso   +11 more
wiley   +1 more source

Observation of gate-tunable coherent perfect absorption of terahertz radiation in graphene [PDF]

, 2016
We report experimental observation of electrically-tunable coherent perfect absorption (CPA) of terahertz (THz) radiation in graphene. We develop a reflection-type tunable THz cavity formed by a large-area graphene layer, a metallic reflective electrode ...
N. Kakenov, O. Balci, T. Takan, V. Ozkan, H. Altan, C. Kocabas   +5 more
semanticscholar   +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

Coherent synchrotron radiation for broadband terahertz spectroscopy

Review of Scientific Instruments, 2013
We present the first high resolution (10−3 cm−1) interferometric measurements in the 200–750 GHz range using coherent synchrotron radiation, achieved with a low momentum compaction factor. The effect of microbunching on spectra is shown, depending on the bunch current.
Barros, J., Evain, C., Manceron, L., Brubach, J-B., Tordeux, M-A., Brunelle, P., Nadolski, L., Loulergue, A., Couprie, M-E., Bielawski, S., Szwaj, C., Roy, P.   +11 more
openaire   +3 more sources

Terahertz Chiral Metamaterials Enabling Broadband Polarization Conversion Using Polarization Guiding Effect

Advanced Materials Technologies, EarlyView.
A broadband terahertz polarization rotator consisting of twistingly stacked silicon–air metagratings is designed based on the polarization guiding effect and experimentally shown to achieve 90° linear polarization rotation for both TE and TM incidences.
Yun‐Seok Choi, Tae Gwan Park, Antoinette J. Taylor, Hou‐Tong Chen, Abul K. Azad   +4 more
wiley   +1 more source

Generation of Strong Terahertz Pulse with Topologically Tunable Polarization Features

Ultrafast Science
Poincaré terahertz beams, which combine orbital and spin angular momentum, hold substantial promise for a wide range of applications. However, despite recent advancements, generating strong-field vector terahertz radiation remains a challenge.
Jie Cai, Yinren Shou, Han Wen, Liqi Han, Zheng Gong, Toshiki Tajima, Jinqing Yu, Xueqing Yan   +7 more
doaj   +1 more source

Control of transverse mode content and polarization structure of terahertz coherent beams [PDF]

Компьютерная оптика, 2019
The paper is devoted to investigation of forming multimode coherent beams of terahertz radiation with pre-given transverse mode content and terahertz vector beams by use of silicon diffractive optical elements forming single modes from terahertz free ...
Vladimir Pavelyev, Yuliya Choporova, Boris Knyazev, Natalya Osintseva, Konstantin Tukmakov   +4 more
doaj   +1 more source