Results 31 to 40 of about 52,939 (282)
Room temperature quantum cascade laser with ∼31% wall-plug efficiency
AIP Advances, 2020 In this article, we report the demonstration of a quantum cascade laser emitting at λ ≈ 4.9 μm with a wall-plug efficiency of ∼31% and an output power of ∼23 W in pulsed operation at room temperature with 50 cascade stages (Ns).
F. Wang +3 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
THz QCL - Based active imaging applied to composite materials diagnostic [PDF]
, 2010 This paper presents a CW raster-scanning THz imaging setup, used to perform Non-Destructive Testing of Kevlar and carbon fibre samples. The setup uses a 2.5 THz Quantum Cascade Laser as a source.
Barbieri, Stefano +4 more
core +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
Monolithically Integrated Mid-Infrared Quantum Cascade Laser and Detector
Sensors, 2013 We demonstrate the monolithic integration of a mid-infrared laser and detector utilizing a bi-functional quantum cascade active region. When biased, this active region provides optical gain, while it can be used as a detector at zero bias. With our novel
Gottfried Strasser +6 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
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
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
Progress towards photonic crystal quantum cascade laser [PDF]
, 2004 The work describes recent progress in the design, simulation, implementation and characterisation of photonic crystal (PhC) GaAs-based quantum cascade lasers (QCLs).
C.D. Farmer +4 more
core +1 more source
On the interdiffusion-based quantum cascade laser [PDF]
, 2002 Design procedure for the active region of current pumped quantum cascade laser is proposed, so to achieve maximal gain. Starting with an arbitrary smooth potential, a family of isospectral Hamiltonians with predefined energy spectrum is generated using ...
Ikonic, Z. +3 more
core +1 more source