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Lasing from excitons in quantum wires

DOI to cite this document:
Pfeiffer, L. N. ; Dignam, M. M. ; Pinczuk, A. ; West, K. W. ; Wegscheider, Werner ; McCall, S. L. ; Hull, R.
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Date of publication of this fulltext: 26 Oct 2009 14:33


Stimulated optical emission from the lowest exciton state in atomically smooth semiconductor quantum wires is observed for the first time. The wires are formed by the ssT intersection of two 7 nm GaAs quantum wells. The optical emission wavelength is nearly independent of pump levels. This absence of band-gap renormalization in the laser emission indicates a marked increase in the stability of the exciton in one dimension.

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