Results 71 to 80 of about 40,370 (319)
Van Der Waals Hybrid Integration of 2D Semimetals for Broadband Photodetection
Advanced Materials, EarlyView.Advanced broadband photodetector technologies are essential for military and civilian applications. 2D semimetals, with their gapless band structures, high mobility, and topological protection, offer great promise for broadband PDs. This study reviews the latest advancements in broadband PDs utilizing heterostructures that combine 2D semimetals with ...
Xue Li +9 more
wiley +1 more source
6.2-GHz modulated terahertz light detection using fast terahertz quantum well photodetectors
Scientific Reports, 2017 The fast detection of terahertz radiation is of great importance for various applications such as fast imaging, high speed communications, and spectroscopy.
Hua Li +9 more
doaj +1 more source
Giant terahertz near-field enhancement by two-dimensional plasmons
, 2011 We consider a periodically gated two-dimensional electron system, with a central gate finger biased independently creating a tunable plasmonic cavity in a planar plasmonic crystal.
Davoyan, Arthur R. +2 more
core +1 more source
Generation of terahertz radiation by AlGaAs nanowires [PDF]
JETP Letters, 2015 Terahertz emission by AlGaAs nanowires grown on a GaAs substrate under excitation by femtosecond optical pulses has been observed. It is demonstrated that THz emission occurs via excitation of photocurrent in the nanowires. The dynamics of photoinduced charge carriers is studied via the influence of an electron—hole plasma on terahertz radiation. It is
Andrew J. Gallant +13 more
openaire +3 more sources
Aramid Nanofiber Aerogels: Preparation, Modification, Composite Fabrication, and Applications
Advanced Materials, EarlyView.Different forms of aramid nanofibers (ANFs) and especially aerogels from them, offer a sustainable route to high‐performance biomimetic nanocomposites. Due to the cartilage‐like architecture, ANF‐based materials enable breakthroughs in energy, electromagnetic, biomedical, and water purification technologies.
Mingqiang Wang +9 more
wiley +1 more source
Terahertz Field Confinement in Nonlinear Metamaterials and Near-Field Imaging
Photonics, 2019 This article reviews recent advances in terahertz science and technology that rely on confining the energy of incident terahertz radiation to small, very sub-wavelength sized regions. We focus on two broad areas of application for such field confinement:
George R. Keiser, Pernille Klarskov
doaj +1 more source
Brain Sciences, 2023 Terahertz waves lie within the rotation and oscillation energy levels of biomolecules, and can directly couple with biomolecules to excite nonlinear resonance effects, thus causing conformational or configuration changes in biomolecules.
Shaoqing Ma +5 more
doaj +1 more source
Analysis of terahertz generation using tilted-pulse-fronts
, 2018 A 2-D spatio-temporal analysis of terahertz generation by optical rectification of tilted-pulse-fronts is presented. Closed form expressions of terahertz transients and spectra in two spatial dimensions are furnished in the undepleted limit. Importantly,
Kärtner, Franz X., Ravi, Koustuban
core +2 more sources
Photoconductive antennas for terahertz radiation.
, 2018 Photoconductive materials are currently used to design antennas that radiate in the terahertz band. In this master thesis is proposed to study the design of different types of antennas and feeding mechanisms to increase the radiation efficiency.
openaire +2 more sources
Acoustic phase imaging with terahertz radiation
Optics Express, 2007 We report on acoustic phase imaging of objects using terahertz radiation. The sensitivity of the technique is sufficient to detect objects at oscillation amplitudes down to about 300 nm. Such acoustic amplitudes are comparable to the human physiological perception level, which offers novel opportunities in security imaging.
Guillermo P. Acuna +2 more
openaire +3 more sources