Measurement of optical absorption by a single quantum dot exciton

J. R. Guest, T. H. Stievater, Xiaoqin Li, Jun Cheng, D. G. Steel, D. Gammon, D. S. Katzer, D. Park, C. Ell, A. Thränhardt, G. Khitrova, H. M. Gibbs

Research output: Contribution to journalArticlepeer-review

125 Scopus citations


We have measured the optical absorption due to an exciton confined to a single interface fluctuation quantum dot by directly measuring the transmission through both a submicron aperture and near-field microscopy. The measurements reveal large dipole moments approaching 100 D at 6 K. These results are compared to theoretical predictions based on a physical size estimated from photoluminescence excitation spectroscopy. The very large dipole moment makes these quantum dots attractive candidates for use in microcavities and quantum logic gates.

Original languageEnglish (US)
Article number241310
Pages (from-to)2413101-2413104
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number24
StatePublished - Jun 15 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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