Multiple wavelength anisotropically polarized mid-infrared emission from InAs quantum dots

D. Wasserman, Claire F. Gmachl, Stephen Aplin Lyon, E. A. Shaner

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Multiple wavelength, anisotropically polarized midinfrared electroluminescence from self-assembled InAs quantum dots grown in AlGaAsGaAs heterostructures has been observed at 77 K. Electrons are injected into excited quantum dot states using a graded AlGaAs injector. Direct tunneling out of the quantum dot excited states is prevented by means of a superlattice electron filter. Two midinfrared peaks are seen in the electrically pumped surface emission spectra of the device. The emission peaks are orthogonally polarized within the growth plane, indicating photon emission from intersublevel electron transitions within anisotropically shaped quantum dots.

Original languageEnglish (US)
Article number191118
JournalApplied Physics Letters
Volume88
Issue number19
DOIs
StatePublished - May 23 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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