By Topic

Nonthermal carrier distributions in the subbands of 2-phonon resonance mid-infrared quantum cascade laser

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Kolek, A. ; Department of Electronics Fundamentals, Rzeszów University of Technology, W.Pola 2 Str., 35-959 Rzeszów, Poland ; Haldas, Grzegorz ; Bugajski, M.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.4745013 

Nonequilibrium Green’s functions model of mid-infrared quantum cascade laser that utilizes double-phonon resonance scheme is analyzed. Good agreement with experimental data is found. For quantities not accessible experimentally, it is shown that electronic distributions in lower active region subbands are nonthermal and have local maximum at higher in-plane energy. In upper subband, carrier distribution is thermal-like. Upper state lifetime is strongly reduced from optical phonon value by interface roughness and alloy scatterings. Net gain originates from population inversion at subbands bottom which is not suppressed by high-k absorption because of nonparabolicity which shifts absorption peak to lower frequencies.

Published in:

Applied Physics Letters  (Volume:101 ,  Issue: 6 )