Results 31 to 40 of about 2,314,699 (185)

Mid-infrared quantum cascade laser arrays with electrical switching of emission frequencies

AIP Advances, 2018
We present a design of quantum cascade laser arrays made of ridge-waveguide devices in which the emission frequency can be electrically switched between several specified values.
Aiting Jiang, Seungyong Jung, Yifan Jiang, Karun Vijayraghavan, Jae Hyun Kim, Mikhail A. Belkin   +5 more
doaj   +1 more source

High Power Mid-Infrared Quantum Cascade Lasers Grown on GaAs

Photonics, 2022
The motivation behind this work is to show that InP-based intersubband lasers with high power can be realized on substrates with significant lattice mismatch.
Steven Slivken, Manijeh Razeghi
doaj   +1 more source

Hydrodynamical model of QED cascade expansion in an extremely strong laser pulse

Matter and Radiation at Extremes, 2021
The development of a self-sustained quantum electrodynamical (QED) cascade in a single strong laser pulse is studied analytically and numerically. A hydrodynamical approach is used to construct an analytical model of cascade evolution, which includes the
A. S. Samsonov, I. Yu. Kostyukov, E. N. Nerush   +2 more
doaj   +1 more source

Design and fabrication of a mid infra-red photonic crystal defect laser in indium antimonide [PDF]

, 2008
This paper presents 2D FDTD modelling and prototype fabrication of a mid-infrared photonic crystal defect laser.
Rarity, John, Cryan, MJ, Heard, Peter J., Cryan, Martin J, J.R. Pugh, Nash, GR, Rarity, JG, M.J. Cryan, Pugh, JR, P.J. Heard, T. Ashley, Nash, Geoffrey R, G.R. Nash, Heard, PJ, Pugh, Jonathan R., Cryan, Martin J., Ashley, T, Rarity, John G., Heard, Peter J, Nash, Geoff R., Ashley, Tim, Pugh, Jon R, J.G. Rarity   +22 more
core   +1 more source

Theory of Dynamic Conductivity of Three-Barrier Resonance-Tullel Structure with Two-Photon Laser Transitions

Фізика і хімія твердого тіла, 2016
Within the approximation of effective mass and rectangular potential barriers for the electron and using theobtained solutions of complete Schrodinger equation, the theory of dynamic conductivity for three-barrierresonant tunneling structure (InGaAs ...
Yu. O. Seti, I. V. Boyko, M. V. Pan’kiv   +2 more
doaj   +1 more source

Possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams [PDF]

, 2012
In laser　cutting　of　thick　steel　sheets,　quality　difference　is　observed　between　cut　surfaces　obtained　with 1 micron and 10 micron laser beams. This paper investigates physical mechanisms for this interesting and important problem of the wavelength ...
Remy Fabbro, Koji Hirano, FABBRO, Rémy, HIRANO, Koji   +3 more
core   +1 more source

Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives

Sensors, 2016
We propose a self-consistent method for the analysis of granular materials at terahertz (THz) frequencies using a quantum cascade laser. The method is designed for signals acquired from a laser feedback interferometer, and applied to non-contact ...
She Han, Karl Bertling, Paul Dean, James Keeley, Andrew D. Burnett, Yah Leng Lim, Suraj P. Khanna, Alexander Valavanis, Edmund H. Linfield, A. Giles Davies, Dragan Indjin, Thomas Taimre, Aleksandar D. Rakić   +12 more
doaj   +1 more source

Sub-terahertz and terahertz generation in long-wavelength quantum cascade lasers

Nanophotonics, 2019
Terahertz quantum cascade laser sources with intra-cavity non-linear frequency mixing are the first room-temperature electrically pumped monolithic semiconductor sources that operate in the 1.2–5.9 THz spectral range.
Fujita Kazuue, Hayashi Shohei, Ito Akio, Hitaka Masahiro, Dougakiuchi Tatsuo   +4 more
doaj   +1 more source

Quantum simulating electron transport in quantum cascade laser structures

, 2020
We propose to use ultracold-fermionic atoms in optical lattices to quantum-simulate electronic transport in quantum-cascade-laser structures.
Minardi F., Smerzi A., Roati G., Cappelli F., Trombettoni A., de Natale P., Scazza F.   +6 more
core   +1 more source

Physics of intraband quantum dot optoelectronic devices [PDF]

, 2007
In last two decades, semiconductor nanostructures, such as quantum wells, wires and dots, have been recognised as sources and detectors of radiation in the mid- and far-infrared region of the spectrum.
Vukmirovic, Nenad
core   +6 more sources