Time-resolved study of carrier transfer among in as/ga as multi-coupled quantum dots

Atsushi Tackeuchi, Yoshiaki Nakata, Shunichi Muto, Yoshihiro Sugiyama, Tatsuya Usuki, Yuji Nishikawa, Naoki Yokoyama, Osamu Wada

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


Carrier transfer among InAs/GaAs self-organized multi-coupled quantum dots was studied using time-resolved photoluminescence. In the multi-coupled quantum dots, since quantum dots couple with the other dots laterally, the photoexcited carriers tunnel into the relatively larger quantum dots which have lower energy levels. The photoluminescence decay time of multi-coupled quantum dots strongly depends on the energy in contrast with conventional quantum dots. The energy dependence can be explained with a cascade-like tunneling model assuming a tunneling time between quantum dots of 1300 ps.

Original languageEnglish
Pages (from-to)L1439-L1441
JournalJapanese journal of applied physics
Issue number11
Publication statusPublished - 1995 Nov
Externally publishedYes


  • Couple
  • Luminescence
  • Quantum dot
  • Time resolved
  • Tunneling

ASJC Scopus subject areas

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


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