Free-carrier absorption in quantum cascade structures

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.85.085310
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TypeArticle
Journal titlePhysical Review B
Volume85
Issue8
Pages085310-1085310-9
AbstractWe show that the free-carrier absorption in quantum cascade lasers (QCLs) is very small and radically different from the classical Drude result due to the orthogonality between the direction of the carrier free motion and the electric field of the laser emission. A quantum mechanical calculation of the free-carrier absorption and intersubband oblique absorption induced by interface defects, Coulombic impurities, and optical phonon absorption/emission is presented for QCLs with a double-quantum-well design. The interaction between the electrons and the optical phonons dominates at room temperature.
Publication date
LanguageEnglish
AffiliationNRC Institute for Microstructural Sciences; National Research Council Canada
Peer reviewedYes
NPARC number19554409
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Record identifier6ad74815-72bb-467c-a0b6-eb770157677b
Record created2012-02-24
Record modified2016-05-09
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