Results 91 to 100 of about 246,481 (370)
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
Advanced Functional Materials, EarlyView.The THz drive of the Mott insulating state of a rare‐earth nickelate induces instantaneous insulator‐metal transition via quantum tunneling of valence electrons across the bandgap. This transition is pure electronic and highly non‐thermal, which may find its applications in ultrafast opto‐electronics with enhanced performance and minimal device size ...
Gulloo Lal Prajapati +7 more
wiley +1 more source
Self-consistent scattering model of carrier dynamics in GaAs-AlGaAs terahertz quantum-cascade lasers [PDF]
, 2003 Intersubband electron scattering transport in terahertz GaAs–AlGaAs quantum cascade lasers is analyzed, using a full 13-level self-consistent rate equation model.
Harrison, P. +3 more
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Terahertz Metamaterials for Linear Polarization Conversion and Anomalous Refraction [PDF]
Science, 2013 Converting Polarization The conversion of a light signal from one polarization direction to another plays an important role in communication and metrology. The components that are presently used for polarization conversion, however, tend to be relatively
N. Grady +8 more
semanticscholar +1 more source
New Journal of Physics, 2015 Plasmonics is one of the growing fields in modern photonics that has garnered increasing interest over the last few years. In this focus issue, the specific challenges concerning terahertz plasmonics have been addressed and most recent advances in this specific field have been highlighted.
Rahm, Marco +4 more
openaire +5 more sources
Compositing Effect Leads to Extraordinary Performance in GeSe‐Based Thermoelectrics
Advanced Functional Materials, EarlyView.Rhombohedral GeSe is rationally designed with (GeSe)0.9(AgBiTe2)0.1‐1.5 mol.% SnSe, achieving a peak ZT of 1.31 at 623 K. Forming a composite with SnSe establishes interfaces with strong phonon scattering and weak electron scattering. Multiscale defects lead to an ultra‐low lattice thermal conductivity (0.26 W m−1 K−1), approaching the amorphous limit.
Min Zhang +14 more
wiley +1 more source
Multi-resonant tunable absorber of terahertz metamaterial based on GaAs and VO2
Results in Physics, 2023 Based on the fact that the conductivity of photosensitive semiconductors can be regulated by external pump light, a metamaterial absorber with single-band and dual-band switchable in terahertz region is designed by replacing gallium arsenide (GaAs ...
Tingting Yuan +4 more
doaj
Combating the Distance Problem in the Millimeter Wave and Terahertz Frequency Bands [PDF]
IEEE Communications Magazine, 2018 In the millimeter-wave (30-300 GHz) and terahertz (0.1-10 THz) frequency bands, the high spreading loss and molecular absorption often limit the signal transmission distance and coverage range.
I. Akyildiz, Chong Han, Shuai Nie
semanticscholar +1 more source
Low‐Loss Far‐Infrared Surface Phonon Polaritons in Suspended SrTiO3 Nanomembranes
Advanced Functional Materials, EarlyView.The low‐loss, highly confined, and thickness‐tunable surface phonon polaritons are demonstrated in the far‐infrared regime within transferable freestanding SrTiO3 membranes, achieving high figures of merit comparable to the previous record values from the vdW materials.
Konnor Koons +8 more
wiley +1 more source
Engineering Strategies for 2D Layered Tin Halide Perovskite Field‐Effect Transistors
Advanced Functional Materials, EarlyView.2D halide perovskites are promising candidates for field‐effect transistor (FET) applications due to their high stability and suppressed ion migration in the presence of bulky organic spacers. This review systematically summarizes the optimization engineering strategies of 2D perovskite FETs and future challenges, which provide guidance for developing ...
Shuanglong Wang +4 more
wiley +1 more source