Spin relaxation dynamics in highly uniform InAs quantum dots

A. Tackeuchi, Y. Suzuki, M. Murayama, T. Kitamura, T. Kuroda, T. Takagahara, K. Yamaguchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have investigated carrier spin dynamics in highly uniform self-assembled InAs quantum dots. The highly uniform quantum dots allowed us to observe the spin dynamics in the ground state and that in the first excited state separately, without the disturbance of inhomogeneous broadening. The spin relaxation times in the ground state and the first excited state were measured to be 1.0 ns and 0.6 ns, respectively. Our measurements reveal the absence of the carrier density dependence of the spin relaxation time. The measured spin relaxation time decreases rapidly from 1.1 ns at 10 K to 200 ps at 130 K. This large change in the spin relaxation time is well explained in terms of the mechanism of acoustic phonon emission.

Original languageEnglish
Title of host publicationPHYSICS OF SEMICONDUCTORS
Subtitle of host publication27th International Conference on the Physics of Semiconductors, ICPS-27
Pages1391-1392
Number of pages2
DOIs
Publication statusPublished - 2005 Jun 30
EventPHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27 - Flagstaff, AZ, United States
Duration: 2004 Jul 262004 Jul 30

Publication series

NameAIP Conference Proceedings
Volume772
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferencePHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27
CountryUnited States
CityFlagstaff, AZ
Period04/7/2604/7/30

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Tackeuchi, A., Suzuki, Y., Murayama, M., Kitamura, T., Kuroda, T., Takagahara, T., & Yamaguchi, K. (2005). Spin relaxation dynamics in highly uniform InAs quantum dots. In PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27 (pp. 1391-1392). (AIP Conference Proceedings; Vol. 772). https://doi.org/10.1063/1.1994633