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 language | English |
|---|---|
| Article number | 035328 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 77 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jan 22 2008 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Htoon, H., Furis, M., Crooker, S. A., Jeong, S., & Klimov, V. I. (2008). Linearly polarized 'fine structure' of the bright exciton state in individual CdSe nanocrystal quantum dots. Physical Review B - Condensed Matter and Materials Physics, 77(3), [035328]. https://doi.org/10.1103/PhysRevB.77.035328