Microscopic theory for intersubband spontaneous emission

M. F. Pereira, A. Wacker

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


The amplified spontaneous emission spectra of quantum-cascade laser structures is computed with a Keldysh Green's functions theory. We show that the emission spectra are sharpened in comparison to gain spectra due to wave guide propagation. In addition the different dependence on level occupation causes moderate differences between gain and emission peak positions. Our fit-parameter-free theory is valid in ranges of strong nonequilibrium, where fit-parameters do not even exist.

Original languageBritish English
Pages (from-to)356-359
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number2
StatePublished - 2007
EventInternational Conference on Superlattices, Nano-structures and Nano-devices, ICSNN-2006 - Istanbul, Turkey
Duration: 30 Jul 20064 Aug 2006


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