Time-resolved observation of coherent excitonic nonlinear response with a table-top narrowband THz pulse wave

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

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    By combining a tilted-pulse-intensity-front scheme using a LiNbO3 crystal and a chirped-pulse-beating method, we generated a narrowband intense terahertz (THz) pulse, which had a maximum electric field of more than 10 kV/cm at around 2 THz, a bandwidth of ∼50 GHz, and frequency tunability from 0.5 to 2 THz. By performing THz-pump and near-infrared-probe experiments on GaAs quantum wells, we observed that the resonant excitation of the intraexcitonic 1s-2p transition induces a clear and large Autler-Townes splitting. Our time-resolved measurements show that the splitting energy observed in the rising edge region of electric field is larger than in the constant region. This result implies that the splitting energy depends on the time-averaged THz field over the excitonic dephasing time rather than that at the instant of the exciton creation by a probe pulse.

    Original languageEnglish
    Article number221106
    JournalApplied Physics Letters
    Volume107
    Issue number22
    DOIs
    Publication statusPublished - 2015 Nov 30

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Fingerprint Dive into the research topics of 'Time-resolved observation of coherent excitonic nonlinear response with a table-top narrowband THz pulse wave'. Together they form a unique fingerprint.

  • Cite this

    Uchida, K., Hirori, H., Aoki, T., Wolpert, C., Tamaya, T., Tanaka, K., Mochizuki, T., Kim, C., Yoshita, M., Akiyama, H., Pfeiffer, L. N., & West, K. W. (2015). Time-resolved observation of coherent excitonic nonlinear response with a table-top narrowband THz pulse wave. Applied Physics Letters, 107(22), [221106]. https://doi.org/10.1063/1.4936753