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Title: Investigating temperature degradation in THz quantum cascade lasers by examination of temperature dependence of output power

Abstract

In this paper, we demonstrate a method to investigate the temperature degradation of THz quantum cascade lasers (QCLs) based on analyzing the dependence of lasing output power on temperature. The output power is suggested to decrease exponentially with some characteristic activation energy indicative of the degradation mechanism. As a proof of concept, Arrhenius plots of power versus temperature are used to extract the activation energy in vertical transition THz QCLs. The extracted energies are consistent with thermally activated longitudinal optical-phonon scattering being the dominant degradation mechanism, as is generally accepted. The extracted activation energy values are shown to be in good agreement with the values predicted from laser spectra.

Authors:
;  [1]
  1. Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
22398803
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACTIVATION ENERGY; ARRHENIUS EQUATION; EMISSION SPECTRA; ENERGY SPECTRA; LASERS; PHONONS; SCATTERING; TEMPERATURE DEPENDENCE; THZ RANGE

Citation Formats

Albo, Asaf, E-mail: asafalbo@gmail.com, and Hu, Qing. Investigating temperature degradation in THz quantum cascade lasers by examination of temperature dependence of output power. United States: N. p., 2015. Web. doi:10.1063/1.4916961.
Albo, Asaf, E-mail: asafalbo@gmail.com, & Hu, Qing. Investigating temperature degradation in THz quantum cascade lasers by examination of temperature dependence of output power. United States. doi:10.1063/1.4916961.
Albo, Asaf, E-mail: asafalbo@gmail.com, and Hu, Qing. Mon . "Investigating temperature degradation in THz quantum cascade lasers by examination of temperature dependence of output power". United States. doi:10.1063/1.4916961.
@article{osti_22398803,
title = {Investigating temperature degradation in THz quantum cascade lasers by examination of temperature dependence of output power},
author = {Albo, Asaf, E-mail: asafalbo@gmail.com and Hu, Qing},
abstractNote = {In this paper, we demonstrate a method to investigate the temperature degradation of THz quantum cascade lasers (QCLs) based on analyzing the dependence of lasing output power on temperature. The output power is suggested to decrease exponentially with some characteristic activation energy indicative of the degradation mechanism. As a proof of concept, Arrhenius plots of power versus temperature are used to extract the activation energy in vertical transition THz QCLs. The extracted energies are consistent with thermally activated longitudinal optical-phonon scattering being the dominant degradation mechanism, as is generally accepted. The extracted activation energy values are shown to be in good agreement with the values predicted from laser spectra.},
doi = {10.1063/1.4916961},
journal = {Applied Physics Letters},
number = 13,
volume = 106,
place = {United States},
year = {Mon Mar 30 00:00:00 EDT 2015},
month = {Mon Mar 30 00:00:00 EDT 2015}
}