Nonequilibrium phonon effects in midinfrared quantum cascade lasers
نویسندگان
چکیده
منابع مشابه
Nonequilibrium phonon effects on electron transport in GaAs-based mid-infrared quantum cascade lasers
The dominant energy relaxation mechanism of electrons in quantum cascade lasers (QCLs) is the non-radiative scattering with optical phonons [1]. Through optical phonon emissions, the injected electrons in the upper lasing level are rapidly transferred to the lower lasing level, and the carrier life time in the upper lasing subband is significantly reduced. Consequently, a large current must be ...
متن کاملCoupled carrier–phonon nonequilibrium dynamics in terahertz quantum cascade lasers: a Monte Carlo analysis
The operation of state-of-the-art optoelectronic quantum devices may be significantly affected by the presence of a nonequilibrium quasiparticle population to which the carrier subsystem is unavoidably coupled. This situation is particularly evident in new-generation semiconductor-heterostructure-based quantum emitters, operating both in the mid-infrared as well as in the terahertz (THz) region...
متن کاملTemperature Effect on THz Quantum Cascade Lasers
A simple semi-phenomenological model, which accurately predicts the dependence of thresholdcurrent for temperature of Resonant-phonon three well quantum cascade laser based on verticaltransitions is offered. We found that, the longitude optical phonon scattering of thermally excitedelectrons is the most important limiting factor for thermal performance of high frequency THz QCLs.In low frequenc...
متن کاملHot-phonon generation in THz quantum cascade lasers
Observation of non-equilibrium optical phonons population associated with electron transport in THz quantum cascade lasers is reported. The phonon occupation number was measured by using a combination of micro-probe photoluminescence and Stokes/Anti-Stokes Raman spectroscopy. Energy balance analysis allows us to estimate the phonon relaxation rate, that superlinearly increases with the electric...
متن کاملPerformance of Phonon Depopulated Terahertz Quantum Cascade Lasers
Ch. Deutsch1, A. Benz1, G. Fasching1, K. Unterrainer1, A. M. Andrews2, P. Klang2, W. Schrenk2, and G. Strasser2 1 Photonics Institute and Center for Microand Nanostructures, Vienna University of Technology, Gusshausstrasse 29/387, 1040 Vienna, Austria 2 Institute of Solid-State Electronics and Center for Microand Nanostructures, Vienna University of Technology, Floragasse 7/362, 1040 Vienna, Au...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2014
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.4896400