Electronic distribution in superlattice quantum cascade lasers

Mariano Troccoli, Gaetano Scamarcio, Vincenzo Spagnolo, Alessandro Tredicucci, Claire Gmachl, Federico Capasso, Deborah L. Sivco, Alfred Y. Cho, Marinella Striccoli

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


The electron population in the excited miniband of quantum cascade structures with intrinsic superlattice active regions is extracted from the fine structure analysis of spontaneous interminiband electroluminescence spectra. At current densities typical of laser thresholds, the electrons injected into the excited miniband of a (GaInAs)6 nm/(AlInAs)1.8 nm superlattice are described by a nonequilibrium thermal distribution characterized by temperatures Te>200 K, much higher than the lattice temperature TL = 15 K.

Original languageEnglish (US)
Pages (from-to)1088-1090
Number of pages3
JournalApplied Physics Letters
Issue number8
StatePublished - Aug 21 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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