Terahertz excitations of lambda systems in a semiconductor microcavity

A. C. Klettke, M. Kira, Stephan W Koch, J. L. Tomaino, A. D. Jameson, Y. S. Lee, Galina Khitrova, H. M. Gibbs

Research output: Contribution to journalArticle

Abstract

Recent experiment-theory investigations have demonstrated that the 2p-exciton state and the polariton resonances of a semiconductor quantum-well (QW) microcavity form a lambda (Λ) system where a terahertz (THz) field can selectively couple to either of the transitionallowed arms. However, semiconductors are open systems because seemingly isolated states are coupled to the continuum of states, either directly or via Coulomb or phonon scattering. A systematic theory is presented to treat these effects in a Λ system and in a two-level system (TLS) described by the 1s-to-2p exciton transition in a semiconductor QW, without the microcavity. Excitonic occupations of polarization are analyzed as function of THz-field frequency and intensity with (Λ system) and without (TLS) cavity. Even though the existence of Λ and TLS resonances is verified, significant deviations are observed at higher THz intensities, as higher ionized exciton states are generated via multi-THz-photon absorption.

Original languageEnglish (US)
Pages (from-to)1222-1225
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume10
Issue number9
DOIs
StatePublished - Sep 2013

Fingerprint

excitons
quantum wells
excitation
multiphoton absorption
polaritons
occupation
continuums
deviation
cavities
polarization
scattering

Keywords

  • Lambda-systems
  • Microcavity polaritons
  • Terahertz spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Terahertz excitations of lambda systems in a semiconductor microcavity. / Klettke, A. C.; Kira, M.; Koch, Stephan W; Tomaino, J. L.; Jameson, A. D.; Lee, Y. S.; Khitrova, Galina; Gibbs, H. M.

In: Physica Status Solidi (C) Current Topics in Solid State Physics, Vol. 10, No. 9, 09.2013, p. 1222-1225.

Research output: Contribution to journalArticle

Klettke, A. C. ; Kira, M. ; Koch, Stephan W ; Tomaino, J. L. ; Jameson, A. D. ; Lee, Y. S. ; Khitrova, Galina ; Gibbs, H. M. / Terahertz excitations of lambda systems in a semiconductor microcavity. In: Physica Status Solidi (C) Current Topics in Solid State Physics. 2013 ; Vol. 10, No. 9. pp. 1222-1225.
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AU - Koch, Stephan W

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AU - Jameson, A. D.

AU - Lee, Y. S.

AU - Khitrova, Galina

AU - Gibbs, H. M.

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