NDLI: Rough interfaces in THz quantum cascade lasers

Content Provider	IEEE Xplore Digital Library
Author	Kubis, T. Klimeck, G.
Copyright Year	2010
Description	Author affiliation: Network for Computational Nanotechnology, Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue University, West Lafayette, 47907 IN, USA (Kubis, T.; Klimeck, G.)
Abstract	The impact of interface roughness scattering on the device performance of state-of-the-art THz quantum cascade lasers is theoretically analyzed using the non-equilibrium Green's function formalism. It is shown that for a particular direct transition QCL design style rough interfaces hardly change the electronic energy spectrum, but dramatically reduce the occupation inversion and the optical gain. A spatial separation leading to a diagonal transition laser, leads in contrast to a limited sensitivity to interface roughness. Diagonal transition QCL designs result in a better device performance and an improved reliability with respect to interface roughness induced by growth quality variations.
Starting Page	1
Ending Page	4
File Size	6403258
Page Count	4
File Format	PDF
ISBN	9781424493838
e-ISBN	9781424493845
DOI	10.1109/IWCE.2010.5677986
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Quantum cascade lasers Optical scattering Laser transitions Electron optics Optical device fabrication Adaptive optics charge transport theory THz quantum cascade laser nonequilibrium Green's functions
Content Type	Text
Resource Type	Article

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