Terahertz excitation of a coherent Λ-type three-level system of exciton-polariton modes in a quantum-well microcavity

J. L. Tomaino, A. D. Jameson, Yun Shik Lee, G. Khitrova, H. M. Gibbs, A. C. Klettke, M. Kira, S. W. Koch

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Interactions of few-cycle terahertz pulses with the induced optical polarization in a quantum-well microcavity reveal that the lower and higher exciton-polariton modes together with the optically forbidden 2p-exciton state form a unique Λ-type three-level system. Pronounced nonlinearities are observed via time-resolved strong-terahertz and weak-optical excitation spectroscopy and explained with a fully microscopic theory. The results show that the terahertz pulses strongly couple the exciton-polariton states to the 2p-exciton state while no resonant transition between the two polariton levels is observed.

Original languageEnglish (US)
Article number267402
JournalPhysical review letters
Volume108
Issue number26
DOIs
StatePublished - Jun 26 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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