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

K. Uchida, H. Hirori, Takao 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
    ISBN (Print)9781628414516
    Publication statusPublished - 2015
    EventUltrafast Phenomena and Nanophotonics XIX - San Francisco, United States
    Duration: 2015 Feb 82015 Feb 11


    OtherUltrafast Phenomena and Nanophotonics XIX
    CountryUnited States
    CitySan Francisco


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

    ASJC Scopus subject areas

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

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