Semiconductor excitons in new light

S. W. Koch, M. Kira, G. Khitrova, H. M. Gibbs

Research output: Contribution to journalReview articlepeer-review

223 Scopus citations


The concept of excitonic quasi-particles and their elementary properties using the relatively newly available terahertz light sources was analyzed. A relatively new concept of direct quasi-particle spectroscopy and its use to identify genuine populations of excitons was studied. It was suggested that to identify the presence of excitonic quasi-particles in semiconductors, one should look for transitions between the Coulombic internal exciton levels. A scheme of quantum-optical excitation to generate quantum-degenerate exciton states directly was also discussed. Quantum-optical spectroscopy was suggested to be a more direct method of obtaining a quantum-degenerate state.

Original languageEnglish (US)
Pages (from-to)523-531
Number of pages9
JournalNature materials
Issue number7
StatePublished - Jul 2006

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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