Optical nonlinearities and phase relaxation of excitons in GaN

K. Hazu, A. Shikanai, Takayuki Sota, K. Suzuki, S. Adachi, S. F. Chichibu, T. Mukai

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    We have studied the properties of coherent exciton states in a free standing wurtzite GaN using the degenerate four-wave-mixing (FWM) technique with subpicosecond time resolution. The polarization dependence of spectrally resolved FWM signals has demonstrated that excitation-induced dephasing is the dominant FWM process. The exciton energy renormalization has been found to dependent on the polarization configuration. FWM signals due to local field effect have been successfully discriminated from those due to other effects. These reveal an importance of four-particle correlations in two-exciton continuum states even for the low excitation power limit where no bound biexciton signal is detected. The temperature dependence of the homogeneous broadening of excitons has also been studied up to 60 K, to obtain the exciton-acoustic phonon interaction coefficient of 9 μeV/K.

    Original languageEnglish
    Article number195202
    Pages (from-to)1952021-1952028
    Number of pages8
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume65
    Issue number19
    Publication statusPublished - 2002 May 15

    Fingerprint

    Excitons
    Four wave mixing
    four-wave mixing
    nonlinearity
    excitons
    Polarization
    polarization
    wurtzite
    excitation
    Acoustics
    LDS 751
    continuums
    temperature dependence
    acoustics
    coefficients
    configurations
    interactions
    Temperature
    energy

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Hazu, K., Shikanai, A., Sota, T., Suzuki, K., Adachi, S., Chichibu, S. F., & Mukai, T. (2002). Optical nonlinearities and phase relaxation of excitons in GaN. Physical Review B - Condensed Matter and Materials Physics, 65(19), 1952021-1952028. [195202].

    Optical nonlinearities and phase relaxation of excitons in GaN. / Hazu, K.; Shikanai, A.; Sota, Takayuki; Suzuki, K.; Adachi, S.; Chichibu, S. F.; Mukai, T.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 19, 195202, 15.05.2002, p. 1952021-1952028.

    Research output: Contribution to journalArticle

    Hazu, K, Shikanai, A, Sota, T, Suzuki, K, Adachi, S, Chichibu, SF & Mukai, T 2002, 'Optical nonlinearities and phase relaxation of excitons in GaN', Physical Review B - Condensed Matter and Materials Physics, vol. 65, no. 19, 195202, pp. 1952021-1952028.
    Hazu K, Shikanai A, Sota T, Suzuki K, Adachi S, Chichibu SF et al. Optical nonlinearities and phase relaxation of excitons in GaN. Physical Review B - Condensed Matter and Materials Physics. 2002 May 15;65(19):1952021-1952028. 195202.
    Hazu, K. ; Shikanai, A. ; Sota, Takayuki ; Suzuki, K. ; Adachi, S. ; Chichibu, S. F. ; Mukai, T. / Optical nonlinearities and phase relaxation of excitons in GaN. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 65, No. 19. pp. 1952021-1952028.
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