Terahertz electroluminescence from superlattice quantum cascade structures

Raffaele Colombelli, Axel Straub, Federico Capasso, Claire F. Gmachl, Myrtle I. Blakey, A. Michael Sergent, S. N.George Chu, Ken W. West, Loren N. Pfeiffer

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Intersubband electroluminescence is reported in a quantum-cascade structure based on asymmetric superlattice active regions and designed for emission in the THz range (λ≈80 μm). Comparison with a structure based on a "vertical transition" in a single quantum well shows an increased full width at half maximum (2.8 vs 0.9 meV) of the emission line. In both cases the dependence of the optical power on the injected current is linear or sublinear and remains in the pW range.

Original languageEnglish (US)
Pages (from-to)3526-3529
Number of pages4
JournalJournal of Applied Physics
Volume91
Issue number6
DOIs
StatePublished - Mar 15 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Colombelli, R., Straub, A., Capasso, F., Gmachl, C. F., Blakey, M. I., Sergent, A. M., Chu, S. N. G., West, K. W., & Pfeiffer, L. N. (2002). Terahertz electroluminescence from superlattice quantum cascade structures. Journal of Applied Physics, 91(6), 3526-3529. https://doi.org/10.1063/1.1448393