Results 81 to 90 of about 118,629 (299)
Coherent phonon induced optical modulation in semiconductors at terahertz frequencies [PDF]
, 2013 The coherent modulation of electronic and vibrational nonlinearities in atoms and molecular gases by intense few-cycle pulses has been used for high-harmonic generation in the soft X-ray and attosecond regime, as well as for Raman frequency combs that ...
Constantinescu Anca Monia +4 more
core +2 more sources
Advanced Materials, EarlyView.Anion‐exchange doping of conjugated polymers is an effective way to achieve high conductivities. Here, we report over 2000 S cm−1 electrical conductivity for doped P(g3BTTT). In addition, we show that P(g3BTTT) sustains exceptionally high doping levels without any drop in the charge mobility.
Basil Hunger +14 more
wiley +1 more source
Josephson-vortex-flow terahertz emission in layered high-$T_c$ superconducting single crystals
, 2006 We report on the successful terahertz emission (0.6$\sim$1 THz) that is continuous and tunable in its frequency and power, by driving Josephson vortices in resonance with the collective standing Josephson plasma modes excited in stacked Bi$_2$Sr$_2$CaCu ...
Hu-Jong Lee +5 more
core +1 more source
Optics Express, 2010 We report on one-dimensional photonic crystals designed to exhibit a pronounced form birefringence at terahertz frequencies. The crystals can be used as volumetric quasioptical elements for a broad frequency range. Theoretical simulations of the dielectric parameters of these structures are presented as well as measurement results of a polymeric ...
Maik, Scheller +2 more
openaire +2 more sources
A Terahertz Molecular Switch [PDF]
Physical Review Letters, 2003 4 pages, 5 figures. To appear in Phys.
Orellana P, Claro Huneeus, Francisco
openaire +8 more sources
Advanced Materials, EarlyView.This article explores how the integration of a thin shell, combined with optimized surface chemistry, enables the design of photodiodes based on short‐wave infrared HgTe nanocrystals. These photodiodes achieve an open‐circuit voltage greater than half the optical bandgap, which drastically reduces dark current. The article also explores the integration
Albin Colle +17 more
wiley +1 more source
Electromechanically Tunable Metasurface Transmission Waveplate at Terahertz Frequencies
, 2017 Dynamic polarization control of light is essential for numerous applications ranging from enhanced imaging to materials characterization and identification.
Averitt, Richard D. +6 more
core +1 more source
Spintronic terahertz emitters with integrated metallic terahertz cavities
NanophotonicsAbstract Spintronic terahertz emitters (STEs), based on optical excitation of nanometer thick ferromagnetic/heavy metal (FM/HM) heterojunctions, have become important sources for the generation of terahertz (THz) pulses. However, the efficiency of the optical-to-THz conversion remains limited.
Mičica, Martin +13 more
openaire +5 more sources
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 +8 more
wiley +1 more source
Giant Tunable Goos–Hänchen Shifts Based on Prism/Graphene Structure in Terahertz Wave Region
IEEE Photonics Journal, 2014 We investigate the giant tunable Goos-Hänchen shifts in prism/graphene structure. It is found that large positive and negative lateral Goos-Hänchen shifts can be easily controlled by adjusting the chemical potential of the graphene, which
Li Jiu-Sheng, Wu Jing-fang, Zhang Le
doaj +1 more source