Results 61 to 70 of about 28,891 (190)

Proof-of-principle of surface detection with air-guided quantum cascade lasers [PDF]

, 2008
We report a proof-of-principle of surface detection with air-guided quantum cascade lasers. Laser ridges were designed to exhibit an evanescent electromagnetic field on their top surface that can interact with material or liquids deposited on the device.
Colombelli, Raffaele, Krysa, Audrey B., Moreau, Virginie, Painter, Oskar, Perahia, Raviv, Wilson, Luke R.   +5 more
core   +1 more source

Thermal effects in InGaAs/AlAsSb quantum-cascade lasers [PDF]

, 2006
A quantum-cascade laser (QCL) thermal model is presented. On the basis of a finite-difference approach, the model is used in conjunction with a self-consistent carrier transport model to calculate the temperature distribution in a near-infrared InGaAs ...
C.A. Evans, D. Indjin, Evans, Evans, Jovanović, P. Harrison, V.D. Jovanović, Yang, Yang, Yu, Yu, Z. Ikonić, Zhang   +12 more
core   +1 more source

Heat Dissipation Schemes in AlInAs/InGaAs/InP Quantum Cascade Lasers Monitored by CCD Thermoreflectance

Photonics, 2017
In this paper, we report on the experimental investigation of the thermal performance of lattice matched AlInAs/InGaAs/InP quantum cascade lasers. Investigated designs include double trench, single mesa, and buried heterostructures, which were grown by ...
Dorota Pierścińska, Kamil Pierściński, Piotr Gutowski, Mikołaj Badura, Grzegorz Sobczak, Olga Serebrennikova, Beata Ściana, Marek Tłaczała, Grzegorz Sobczak, Maciej Bugajski   +9 more
doaj   +1 more source

On the coherence/incoherence of electron transport in semiconductor heterostructure optoelectronic devices [PDF]

, 2008
This paper compares and contrasts different theoretical approaches based on incoherent electron scattering transport with experimental measurements of optoelectronic devices formed from semiconductor heterostructures.
Evans, C.A., Harrison, P., Ikonic, Z., Indjin, D., Jovanovic, J.D., Kelsall, R.W., McTavish, J., Milanovic, V., Savic, I., Vukmirovic, N.   +9 more
core   +1 more source

Terahertz frequency quantum cascade lasers for use as waveguide-integrated local oscillators [PDF]

, 2016
Since their first demonstration in 2002, the performance of terahertz frequency quantum cascade lasers has developed extremely rapidly. We consider the potential use of terahertz frequency quantum cascade lasers as local oscillators in satellite-borne ...
Brewster, N, Bushnell, L, Davies, AG, Dean, P, Dong, R, Ellison, BN, Han, YJ, Li, LH, Linfield, EH, Oldfield, M, Valavanis, A, Zhu, JX   +11 more
core   +1 more source

Population-inversion and gain estimates for a semiconductor TASER [PDF]

, 2001
We have investigated a solid-state design advanced (see Soref et al, in SPIE Proceedings, vol. 3795, p, 516, 1999) to achieve a terahertz-amplification-by-the-stimulated-emision-of-radiation (TASER), The original design was based on light-to heavy-hole ...
Harrison, P., Soref, R.A.
core   +1 more source

On-chip wide tuning of high-power quantum cascade laser based on a vertical-integrated heater

APL Photonics
Mid-infrared high-peak power quantum cascade lasers are highly useful in many applications such as gas sensing and free-space communication. However, practical application scenarios place further demands on the wavelength tunability and integration of ...
Binru Zhou, Shichen Zhang, Yu Ma, Zejun Ma, Haiyun Dong, Rusong Li, Yixuan Zhu, Ning Zhuo, Shenqiang Zhai, Jinchuan Zhang, Fengqi Liu, Quanyong Lu   +11 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, C.L. Walker, C.N. Ironside, C.R. Stanley, Faist   +4 more
core   +1 more source

Mid-Infrared Quantum-Dot Quantum Cascade Laser: A Theoretical Feasibility Study

Photonics, 2016
In the framework of a microscopic model for intersubband gain from electrically pumped quantum-dot structures we investigate electrically pumped quantum-dots as active material for a mid-infrared quantum cascade laser.
Stephan Michael, Weng W. Chow, Hans Christian Schneider   +2 more
doaj   +1 more source

Investigation of thermal effects in quantum-cascade lasers [PDF]

, 2006
The development of a thermal model for quantum cascade lasers (QCLs) is presented. The model is used in conjunction with a self-consistent scattering rate calculation of the electron dynamics of an InGaAs-AlAsSb QCL to calculate the temperature ...
Evans, C.A., Harrison, P., Ikonic, Z., Indjin, D., Jovanovic, V.D.   +4 more
core   +1 more source