Time-resolved emission from self-assembled single quantum dots using scanning near-field optical microscope

Madoka Ono, Kazunari Matsuda, Toshiharu Saiki, Kenichi Nishi, Takashi Mukaiyama, Makoto Kuwata-Gonokami

研究成果: Article査読

16 被引用数 (Scopus)

抄録

We study time-resolved emission from self-assembled single InGaAs/GaAs quantum dots by the time-correlated single photon counting method using near-field optical microscopy. The decay time of the emission from discrete levels of a single quantum dot increases with the decrease in the emission energy and with the increase in the excitation intensity. We develop a rate equation model which accounts for the initial filling of the states, cascade relaxation, state filling and carrier feeding from a wetting layer. High collection efficiency of a double-tapered-type fiber probe enables us to study the emission even at very weak excitation intensities. The direct excitation into a single dot is dominant at this excitation level. State filling, cascade relaxation and extra carrier feeding from the wetting layer become pronounced when the excitation intensity increases.

本文言語English
ページ(範囲)L1460-L1462
ジャーナルUnknown Journal
38
12 A
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

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

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