Ultrafast optical sampling pump-probe measurement of exciton spin relaxation in GaAs/AlGaAs quantum wells

Satoru Adachi; Shojiro Takeyama; Yoshihiro Takagi; Atsushi Tackeuchi; Shunichi Muto

doi:10.1063/1.116113

Ultrafast optical sampling pump-probe measurement of exciton spin relaxation in GaAs/AlGaAs quantum wells

Satoru Adachi, Shojiro Takeyama, Yoshihiro Takagi, Atsushi Tackeuchi, Shunichi Muto

Research output: Contribution to journal › Article

17 Citations (Scopus)

Abstract

Spin dynamics in GaAs/AlGaAs multiple quantum wells at room temperature are studied in subpicosecond to nanosecond time region by using the optical sampling nondegenerate pump-probe technique. Polarization-dependent absorption signals resonant to the light-hole (lh) exciton revealed the subpicosecond spin relaxation time which was several tens of times shorter than that of the heavy-hole (hh) exciton. Resonant pumping to lh and probing at hh exhibited no spin dependence within the time resolution, showing the spin memory being washed out completely during the energy relaxation from lh to hh.

Original language	English
Pages (from-to)	964
Number of pages	1
Journal	Applied Physics Letters
DOIs	https://doi.org/10.1063/1.116113
Publication status	Published - 1995
Externally published	Yes

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ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Cite this

Adachi, S., Takeyama, S., Takagi, Y., Tackeuchi, A., & Muto, S. (1995). Ultrafast optical sampling pump-probe measurement of exciton spin relaxation in GaAs/AlGaAs quantum wells. Applied Physics Letters, 964. https://doi.org/10.1063/1.116113

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AU - Adachi, Satoru

AU - Takeyama, Shojiro

AU - Takagi, Yoshihiro

AU - Tackeuchi, Atsushi

AU - Muto, Shunichi

PY - 1995

Y1 - 1995

N2 - Spin dynamics in GaAs/AlGaAs multiple quantum wells at room temperature are studied in subpicosecond to nanosecond time region by using the optical sampling nondegenerate pump-probe technique. Polarization-dependent absorption signals resonant to the light-hole (lh) exciton revealed the subpicosecond spin relaxation time which was several tens of times shorter than that of the heavy-hole (hh) exciton. Resonant pumping to lh and probing at hh exhibited no spin dependence within the time resolution, showing the spin memory being washed out completely during the energy relaxation from lh to hh.

AB - Spin dynamics in GaAs/AlGaAs multiple quantum wells at room temperature are studied in subpicosecond to nanosecond time region by using the optical sampling nondegenerate pump-probe technique. Polarization-dependent absorption signals resonant to the light-hole (lh) exciton revealed the subpicosecond spin relaxation time which was several tens of times shorter than that of the heavy-hole (hh) exciton. Resonant pumping to lh and probing at hh exhibited no spin dependence within the time resolution, showing the spin memory being washed out completely during the energy relaxation from lh to hh.

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10.1063/1.116113