Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells

K. Uchida, H. Hirori, T. Aoki, C. Wolpert, K. Tanaka, T. Mochizuki, C. Kim, M. Yoshita, H. Akiyama, L. N. Pfeiffer, K. W. West

Research output: Chapter in Book/Report/Conference proceedingConference contribution


By means of THz pump and optical probe spectroscopy, we observed that the incident THz pulse induces a strong spectral modulation of the 1s heavy-hole exciton peak of GaAs quantum wells due to Rabi splitting. Our precise measurements in the time domain show that the Rabi splitting follows the instantaneous THz electric pulse at extremely strong fields but persists up to a negative delay time of ∼1 ps at weak fields. This field dependent dynamics of the Rabi splitting indicates that the excitonic field ionization governs a nonperturbative nonlinear dynamics of excitons by causing a reduction of the dephasing time.

Original languageEnglish
Title of host publicationUltrafast Phenomena and Nanophotonics XIX
EditorsMarkus Betz, Kong-Thon Tsen, Abdulhakem Y. Elezzabi
ISBN (Electronic)9781628414516
Publication statusPublished - 2015
EventUltrafast Phenomena and Nanophotonics XIX - San Francisco, United States
Duration: 2015 Feb 82015 Feb 11

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherUltrafast Phenomena and Nanophotonics XIX
Country/TerritoryUnited States
CitySan Francisco


  • Exciton
  • Nonlinear optics
  • Quantum well
  • THz spectroscopy
  • Ultrafast phenomena

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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