Measurements of exciton-polariton dynamics in ZnO by using nonlinear spectroscopic techniques

K. Hazu, S. Adachi, Takayuki Sota, S. F. Chichibu

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    We have studied the exciton-polariton dynamics in a c-face bulk ZnO crystal grown by the seeded vapor transport method. We have performed two-pulse spectrally resolved four-wave mixing (SR-FWM) and three-pulse SR-FWM at T=10 K. In two-pulse FWM experiment, obtained FWM signals showed the fast dephasing which has been attributed to the strong polariton dispersion of the upper polariton of B exciton. On the other hand, in three-pulse FWM experiment, the signal decay shows the free exciton population relaxation. Observed FWM signal has decayed with time constant ∼12 ps which may represent exciton-polariton lifetime.

    Original languageEnglish
    Pages (from-to)7-10
    Number of pages4
    JournalJournal of Luminescence
    Volume112
    Issue number1
    DOIs
    Publication statusPublished - 2005 Apr

    Fingerprint

    polaritons
    excitons
    Four wave mixing
    pulses
    four-wave mixing
    time constant
    Experiments
    Vapors
    vapors
    life (durability)
    Crystals
    LDS 751
    decay
    Population
    crystals

    Keywords

    • Exciton
    • Four-wave mixing
    • Polariton
    • ZnO

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Atomic and Molecular Physics, and Optics

    Cite this

    Measurements of exciton-polariton dynamics in ZnO by using nonlinear spectroscopic techniques. / Hazu, K.; Adachi, S.; Sota, Takayuki; Chichibu, S. F.

    In: Journal of Luminescence, Vol. 112, No. 1, 04.2005, p. 7-10.

    Research output: Contribution to journalArticle

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    abstract = "We have studied the exciton-polariton dynamics in a c-face bulk ZnO crystal grown by the seeded vapor transport method. We have performed two-pulse spectrally resolved four-wave mixing (SR-FWM) and three-pulse SR-FWM at T=10 K. In two-pulse FWM experiment, obtained FWM signals showed the fast dephasing which has been attributed to the strong polariton dispersion of the upper polariton of B exciton. On the other hand, in three-pulse FWM experiment, the signal decay shows the free exciton population relaxation. Observed FWM signal has decayed with time constant ∼12 ps which may represent exciton-polariton lifetime.",
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    AU - Adachi, S.

    AU - Sota, Takayuki

    AU - Chichibu, S. F.

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    AB - We have studied the exciton-polariton dynamics in a c-face bulk ZnO crystal grown by the seeded vapor transport method. We have performed two-pulse spectrally resolved four-wave mixing (SR-FWM) and three-pulse SR-FWM at T=10 K. In two-pulse FWM experiment, obtained FWM signals showed the fast dephasing which has been attributed to the strong polariton dispersion of the upper polariton of B exciton. On the other hand, in three-pulse FWM experiment, the signal decay shows the free exciton population relaxation. Observed FWM signal has decayed with time constant ∼12 ps which may represent exciton-polariton lifetime.

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