Ionization of coherent excitons by strong terahertz fields

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

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


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
Issue number7
StatePublished - Feb 6 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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