Pump probe measurement of electron spin relaxation time in (110)-oriented gaas/algaas multiple quantum well microposts

Nobuhide Yokota; Yoshihiro Tsunemi; Kazuhiro Ikeda; Hitoshi Kawaguchi

doi:10.1143/APEX.5.122401

Pump probe measurement of electron spin relaxation time in (110)-oriented gaas/algaas multiple quantum well microposts

Nobuhide Yokota, Yoshihiro Tsunemi, Kazuhiro Ikeda, Hitoshi Kawaguchi

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We measured the electron spin relaxation time ts in (110)-oriented GaAs/AlGaAs multiple quantum well microposts using a pump probe technique with a time resolution of 1.3 ps. A long ts of 0.74 ns was obtained even for 0.5 -m posts in which the carrier lifetime ° was drastically shortened to 27 ps. Such long ts and short ° are suitable for fast switching of lasing circular polarizations in vertical-cavity surface-emitting lasers (VCSELs). Our rate equation analysis revealed that a ts much longer than the ° obtained in the measurement does not limit the switching speed of lasing circular polarizations in (110)-VCSELs.

Original language	English
Article number	122401
Journal	Applied Physics Express
Volume	5
Issue number	12
DOIs	https://doi.org/10.1143/APEX.5.122401
Publication status	Published - 2012 Dec
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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abstract = "We measured the electron spin relaxation time ts in (110)-oriented GaAs/AlGaAs multiple quantum well microposts using a pump probe technique with a time resolution of 1.3 ps. A long ts of 0.74 ns was obtained even for 0.5 -m posts in which the carrier lifetime ° was drastically shortened to 27 ps. Such long ts and short ° are suitable for fast switching of lasing circular polarizations in vertical-cavity surface-emitting lasers (VCSELs). Our rate equation analysis revealed that a ts much longer than the ° obtained in the measurement does not limit the switching speed of lasing circular polarizations in (110)-VCSELs.",

author = "Nobuhide Yokota and Yoshihiro Tsunemi and Kazuhiro Ikeda and Hitoshi Kawaguchi",

year = "2012",

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doi = "10.1143/APEX.5.122401",

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AU - Yokota, Nobuhide

AU - Tsunemi, Yoshihiro

AU - Ikeda, Kazuhiro

AU - Kawaguchi, Hitoshi

PY - 2012/12

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N2 - We measured the electron spin relaxation time ts in (110)-oriented GaAs/AlGaAs multiple quantum well microposts using a pump probe technique with a time resolution of 1.3 ps. A long ts of 0.74 ns was obtained even for 0.5 -m posts in which the carrier lifetime ° was drastically shortened to 27 ps. Such long ts and short ° are suitable for fast switching of lasing circular polarizations in vertical-cavity surface-emitting lasers (VCSELs). Our rate equation analysis revealed that a ts much longer than the ° obtained in the measurement does not limit the switching speed of lasing circular polarizations in (110)-VCSELs.

AB - We measured the electron spin relaxation time ts in (110)-oriented GaAs/AlGaAs multiple quantum well microposts using a pump probe technique with a time resolution of 1.3 ps. A long ts of 0.74 ns was obtained even for 0.5 -m posts in which the carrier lifetime ° was drastically shortened to 27 ps. Such long ts and short ° are suitable for fast switching of lasing circular polarizations in vertical-cavity surface-emitting lasers (VCSELs). Our rate equation analysis revealed that a ts much longer than the ° obtained in the measurement does not limit the switching speed of lasing circular polarizations in (110)-VCSELs.

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Pump probe measurement of electron spin relaxation time in (110)-oriented gaas/algaas multiple quantum well microposts

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