Ring emission and exciton-pair scattering in semiconductor microcavities


Savvidis, P.G., Baumberg, J.J., Porras, D., Whittaker, D., Skolnick, M. and Roberts, J.S. (2002) Ring emission and exciton-pair scattering in semiconductor microcavities. PHYSICAL REVIEW B, 65, (073309), 073309-1.

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Description/Abstract

Polariton microemitters are semiconductor devices that take advantage of the strong coupling of light and matter to produce efficient optical sources. Injecting an exciton gas into such a semiconductor microcavity can produce annular optical emission of a specific cone angle. We demonstrate that at higher exciton densities or temperatures, this ring continuously decreases in diameter due to the greater energy that can be carried off in exciton-pair scattering processes. These Coulomb-mediated exciton-exciton scatterings are shown to dominate the polariton relaxation and optical emission.

Item Type: Article
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > NANO
ePrint ID: 256691
Date Deposited: 18 Jul 2002
Last Modified: 27 Mar 2014 19:58
Publisher: The American Physical Society
Further Information:Google Scholar
ISI Citation Count:30
URI: http://eprints.soton.ac.uk/id/eprint/256691

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