Linearly polarized 'fine structure' of the bright exciton state in individual CdSe nanocrystal quantum dots

H. Htoon, M. Furis, S. A. Crooker, S. Jeong, Victor I Klimov

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We report polarization-resolved, low-temperature, high-spectral-resolution studies of the photoluminescence from individual CdSe nanocrystal quantum dots (NQDs). The spectra reveal a 'fine structure' splitting of the bright exciton state in a subset of the studied NQDs. The two fine structure states are spectrally separated by an energy of up to 3 meV depending on NQD size and are characterized by linearly (and orthogonally) polarized emission dipoles. The average splitting scales approximately with inverse NQD volume, consistent with an anisotropic electron-hole exchange interaction which can result from a breakdown of cylindrical symmetry in some of the NQDs.

Original languageEnglish
Article number035328
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number3
DOIs
Publication statusPublished - Jan 22 2008

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Excitons
Nanocrystals
Semiconductor quantum dots
nanocrystals
fine structure
quantum dots
excitons
Spectral resolution
Exchange interactions
Crystal symmetry
spectral resolution
set theory
Photoluminescence
breakdown
LDS 751
Polarization
dipoles
photoluminescence
Electrons
high resolution

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Linearly polarized 'fine structure' of the bright exciton state in individual CdSe nanocrystal quantum dots. / Htoon, H.; Furis, M.; Crooker, S. A.; Jeong, S.; Klimov, Victor I.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 77, No. 3, 035328, 22.01.2008.

Research output: Contribution to journalArticle

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