Large electrically induced transmission changes of GaAs/AlGaAs quantum-cascade structures

F. Eickemeyer, R. A. Kaindl, M. Woerner, T. Elsaesser, S. Barbieri, P. Kruck, C. Sirtori, J. Nagle

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Using a tunable midinfrared light source we study optical transmission changes of an electrically driven GaAs/AlGaAs quantum-cascade structure without resonator. For forward bias, we observe a transmission increase in the spectral range around the electroluminescence maximum which is due to resonant optical amplification. The observed transmission increase is enhanced up to 20-fold with respect to a bare active region by the internal field enhancement in the quantum-cascade structure and by interference effects in the midinfrared beam. Model calculations account quantitatively for this behavior.

Original languageEnglish (US)
Pages (from-to)3254-3256
Number of pages3
JournalApplied Physics Letters
Issue number22
StatePublished - May 29 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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