Weakly correlated exciton pair states in large quantum dots

Selvakumar V. Nair, Toshihide Takagahara

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We present a calculation of the two-exciton states in semiconductor quantum dots much larger in size than the exciton Bohr radius, and identify a weakly correlated exciton pair state that has a large oscillator strength, increasing proportionately to the volume of the quantum dot. This state is shown to be responsible for the saturation of the size dependence of the resonant excitonic optical nonlinearity. It also provides a satisfactory understanding of the blueshift of the excited-state absorption in quantum dots. These results and the biexciton binding energy and oscillator strength are in good agreement with reported experimental results on CuCl.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume53
Issue number16
Publication statusPublished - 1996 Apr 15
Externally publishedYes

Fingerprint

Excitons
Semiconductor quantum dots
quantum dots
excitons
oscillator strengths
Binding energy
Excited states
binding energy
nonlinearity
saturation
radii
excitation
LDS 751

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Weakly correlated exciton pair states in large quantum dots. / Nair, Selvakumar V.; Takagahara, Toshihide.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 53, No. 16, 15.04.1996.

Research output: Contribution to journalArticle

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