Results 21 to 30 of about 8,835 (243)
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 +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 +2 more
doaj +1 more source
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 +2 more
doaj +1 more source
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 +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 +4 more
doaj +1 more source
Superlattice Structure of Quantum Cascade Lasers: Structural and Morphological Effects of AsH₃ Flow
Cumhuriyet Science JournalThe quantum cascade lasers (QCLs) have been widely used in mid-infrared applications due to their high power, efficiency, and design flexibility. The InP-based quantum cascade lasers, particularly those utilizing In 0.53 Ga 0.47 As/In0.52Al0.48As ...
Merve Nur Koçak, İlkay Demir
doaj +1 more source
Millimeter wave photonics with terahertz semiconductor lasers
Nature Communications, 2021 Photonic solutions for generating free space millimeter radiation is a fast developing field that combines optoelectronics and RF domains but has many challenges.
Valentino Pistore +12 more
doaj +1 more source
Physics Today, 2014 This chapter describes the most commonly used approaches for computing the band structure of active materials with intersubband optical transitions. The physics of quantum cascade lasers (QCLs) is discussed in detail, including the mechanisms that limit the threshold current density, threshold voltage, wall-plug efficiency, and temperature sensitivity ...
openaire +1 more source
Advanced Functional Materials, EarlyView.DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen +3 more
wiley +1 more source