TITLE

Design and simulation of terahertz quantum cascade lasers

AUTHOR(S)
Ko¨hler, Ru¨deger; Iotti, Rita C.; Tredicucci, Alessandro; Rossi, Fausto
PUB. DATE
December 2001
SOURCE
Applied Physics Letters;12/10/2001, Vol. 79 Issue 24, p3920
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Strategies and concepts for the design of THz emitters based on the quantum cascade scheme are analyzed and modeled in terms of a fully three-dimensional Monte Carlo approach; this allows for a proper inclusion of both carrier-carrier and carrier-phonon scattering mechanisms. Starting from the simulation of previously published far-infrared emitters, where no population inversion is achieved, two designs are proposed. The first one follows the well-established chirped-superlattice scheme whereas the second one employs a double-quantum well superlattice to allow energy relaxation through optical phonon emission. For both cases a significant population inversion is predicted at temperatures up to 80 K.
ACCESSION #
5643417

 

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