Negligible pure dephasing in InAs self-assembled quantum dots

Junko Ishi-Hayase, Kouichi Akahane, Naokatsu Yamamoto, Mamiko Kujiraoka, Kazuhiro Ema, Masahide Sasaki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We measured the dephasing time and radiative lifetime of excitons in InAs quantum dots fabricated using the strain compensation technique. The dephasing time at 3 K was as long as 2.86ns using transient four-wave mixing measurements at an excitation wavelength of 1.468 μm. This ultralong dephasing time was due to the significant suppression of pure dephasing.

Original languageEnglish
Pages (from-to)6352-6354
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number9 B
Publication statusPublished - 2007 Sept 20
Externally publishedYes


  • Coherent nonlinear spectroscopy
  • Dephasing
  • Exciton-phonon interaction
  • Quantum dot

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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