Correlation effect of Rabi oscillations of excitons in quantum dots

Junko Hayase, K. Akahane, Y. Yamamoto, M. Kujiraoka, K. Ema, M. Sasaki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We performed a transient four-wave mixing experiment on a strain-compensated InAs quantum dot (QD) ensemble over a wide range of excitation intensities. Under the resonant excitation of an exciton ground state, an extremely long dephasing time of 1 ns was found. By increasing the areas of the excitation pulses, Rabi oscillations of excitonic polarizations were clearly observed. The corresponding Rabi frequency is three orders of magnitude higher than the measured dephasing rate. For larger pulse areas, we found that the deviation of experimental data from two-level predictions became significant. The deviations cannot be explained by taking into account, as has been suggested in other research, excitation density-dependent dephasing or Hartree-Fock-type Coulomb interactions between excitons.

Original languageEnglish
Pages (from-to)1016-1018
Number of pages3
JournalJournal of Luminescence
Volume128
Issue number5-6
DOIs
Publication statusPublished - 2008 May
Externally publishedYes

Fingerprint

Quantum Dots
Semiconductor quantum dots
quantum dots
excitons
oscillations
Four wave mixing
Coulomb interactions
Ground state
excitation
Polarization
deviation
pulses
Research
four-wave mixing
Experiments
ground state
LDS 751
polarization
predictions
interactions

Keywords

  • Four-wave mixing spectroscopy
  • Quantum dots
  • Rabi oscillation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Hayase, J., Akahane, K., Yamamoto, Y., Kujiraoka, M., Ema, K., & Sasaki, M. (2008). Correlation effect of Rabi oscillations of excitons in quantum dots. Journal of Luminescence, 128(5-6), 1016-1018. https://doi.org/10.1016/j.jlumin.2007.12.016

Correlation effect of Rabi oscillations of excitons in quantum dots. / Hayase, Junko; Akahane, K.; Yamamoto, Y.; Kujiraoka, M.; Ema, K.; Sasaki, M.

In: Journal of Luminescence, Vol. 128, No. 5-6, 05.2008, p. 1016-1018.

Research output: Contribution to journalArticle

Hayase, J, Akahane, K, Yamamoto, Y, Kujiraoka, M, Ema, K & Sasaki, M 2008, 'Correlation effect of Rabi oscillations of excitons in quantum dots', Journal of Luminescence, vol. 128, no. 5-6, pp. 1016-1018. https://doi.org/10.1016/j.jlumin.2007.12.016
Hayase, Junko ; Akahane, K. ; Yamamoto, Y. ; Kujiraoka, M. ; Ema, K. ; Sasaki, M. / Correlation effect of Rabi oscillations of excitons in quantum dots. In: Journal of Luminescence. 2008 ; Vol. 128, No. 5-6. pp. 1016-1018.
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