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, and S. W. Koch
Phys. Rev. Lett. 108, 267402 – Published 26 June 2012
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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.

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  • Received 9 December 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.267402

© 2012 American Physical Society

Authors & Affiliations

J. L. Tomaino1, A. D. Jameson1, Yun-Shik Lee1,*, G. Khitrova2, H. M. Gibbs2, A. C. Klettke3, M. Kira3, and S. W. Koch3

  • 1Department of Physics, Oregon State University, Corvallis, Oregon 97331, USA
  • 2Optical Sciences Center, University of Arizona, Tucson, Arizona 85721, USA
  • 3Department of Physics and Material Sciences Center, Philipps-University, 35032 Marburg, Germany

  • *leeys@physics.oregonstate.edu

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Issue

Vol. 108, Iss. 26 — 29 June 2012

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