Spin relaxation dynamics in highly uniform InAs quantum dots

A. Tackeuchi, Y. Suzuki, M. Murayama, T. Kitamura, T. Kuroda, Toshihide 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 publicationAIP Conference Proceedings
Pages1391-1392
Number of pages2
Volume772
DOIs
Publication statusPublished - 2005 Jun 30
Externally publishedYes
EventPHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27 - Flagstaff, AZ, United States
Duration: 2004 Jul 262004 Jul 30

Other

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

Fingerprint

relaxation time
quantum dots
spin dynamics
ground state
excitation
disturbances
acoustics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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 AIP Conference Proceedings (Vol. 772, pp. 1391-1392) https://doi.org/10.1063/1.1994633

Spin relaxation dynamics in highly uniform InAs quantum dots. / Tackeuchi, A.; Suzuki, Y.; Murayama, M.; Kitamura, T.; Kuroda, T.; Takagahara, Toshihide; Yamaguchi, K.

AIP Conference Proceedings. Vol. 772 2005. p. 1391-1392.

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

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 AIP Conference Proceedings. vol. 772, pp. 1391-1392, PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27, Flagstaff, AZ, United States, 04/7/26. https://doi.org/10.1063/1.1994633
Tackeuchi A, Suzuki Y, Murayama M, Kitamura T, Kuroda T, Takagahara T et al. Spin relaxation dynamics in highly uniform InAs quantum dots. In AIP Conference Proceedings. Vol. 772. 2005. p. 1391-1392 https://doi.org/10.1063/1.1994633
Tackeuchi, A. ; Suzuki, Y. ; Murayama, M. ; Kitamura, T. ; Kuroda, T. ; Takagahara, Toshihide ; Yamaguchi, K. / Spin relaxation dynamics in highly uniform InAs quantum dots. AIP Conference Proceedings. Vol. 772 2005. pp. 1391-1392
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