Ionization of coherent excitons by strong terahertz fields

B. Ewers, N. S. Köster, R. Woscholski, M. Koch, S. Chatterjee, Galina Khitrova, H. M. Gibbs, A. C. Klettke, M. Kira, Stephan W Koch

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Abstract

The interaction of coherent excitons with intense, single-cycle terahertz (THz) pulses is investigated. A significant bleaching of the 1s-exciton resonance develops into a splitting of the absorption peak and the emergence of pronounced wings with increasing THz field strength. A quantum-mechanical many-body analysis attributes the experimental observations to a transition from excitonic Rabi flopping to multi-THz-photon ionization and the population of optically dark exciton states with high quantum numbers.

Original languageEnglish (US)
Article number075307
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number7
DOIs
Publication statusPublished - Feb 6 2012

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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