Biexciton and triexciton states in quantum dots in the weak confinement regime

Michio Ikezawa, Yasuaki Masumoto, Toshihide Takagahara, Selvakumar V. Nair

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Biexciton and triexciton states in CuCl quantum dots were studied by means of time-resolved size-selective pump-and-probe technique. A clear induced absorption band is observed on the high-energy side of the excitation photon energy. The new induced absorption is assigned to the transition from the exciton ground state to one of the weakly correlated exciton pair states which were theoretically predicted to exist and to play an important role in nonlinear optical processes. Its pump energy dependence and temporal evolution strongly support this assignment. Under high-density or two-color excitation condition, a triexciton state in quantum dots is observed for the first time.

Original languageEnglish
Pages (from-to)3522-3525
Number of pages4
JournalPhysical Review Letters
Issue number18
Publication statusPublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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