Exciton spin relaxation dynamics in InGaAs/InP quantum wells

Shunsuke Akasaka, Shogo Miyata, Takamasa Kuroda, Atsushi Tackeuchi

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    Abstract

    The exciton spin relaxation mechanism in the range 13 and 300 K in InGaAs/InP quantum wells was analyzed using time-resolved spin-dependent pump and probe absorption measurements. It was observed that exciton spin relaxation time, τs above 40 K depend on temperature, T, according to τs∝I-1.1. The carrier density dependence of exciton spin relaxation time was also observed below 40 K. The results show that spin relaxation is governed by D'yakonov-Perel' (DP) process above 40 K and by Bir-Aronov-Pikus (BAP)process below 40 K.

    Original languageEnglish
    Pages (from-to)2083-2085
    Number of pages3
    JournalApplied Physics Letters
    Volume85
    Issue number11
    DOIs
    Publication statusPublished - 2004 Sep 13

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    excitons
    quantum wells
    relaxation time
    pumps
    probes
    temperature

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Exciton spin relaxation dynamics in InGaAs/InP quantum wells. / Akasaka, Shunsuke; Miyata, Shogo; Kuroda, Takamasa; Tackeuchi, Atsushi.

    In: Applied Physics Letters, Vol. 85, No. 11, 13.09.2004, p. 2083-2085.

    Research output: Contribution to journalArticle

    Akasaka, Shunsuke ; Miyata, Shogo ; Kuroda, Takamasa ; Tackeuchi, Atsushi. / Exciton spin relaxation dynamics in InGaAs/InP quantum wells. In: Applied Physics Letters. 2004 ; Vol. 85, No. 11. pp. 2083-2085.
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    abstract = "The exciton spin relaxation mechanism in the range 13 and 300 K in InGaAs/InP quantum wells was analyzed using time-resolved spin-dependent pump and probe absorption measurements. It was observed that exciton spin relaxation time, τs above 40 K depend on temperature, T, according to τs∝I-1.1. The carrier density dependence of exciton spin relaxation time was also observed below 40 K. The results show that spin relaxation is governed by D'yakonov-Perel' (DP) process above 40 K and by Bir-Aronov-Pikus (BAP)process below 40 K.",
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    AU - Tackeuchi, Atsushi

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