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 |
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ASJC Scopus subject areas
- Condensed Matter Physics
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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 journal › Article
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TY - JOUR
T1 - Linearly polarized 'fine structure' of the bright exciton state in individual CdSe nanocrystal quantum dots
AU - Htoon, H.
AU - Furis, M.
AU - Crooker, S. A.
AU - Jeong, S.
AU - Klimov, Victor I
PY - 2008/1/22
Y1 - 2008/1/22
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.77.035328
DO - 10.1103/PhysRevB.77.035328
M3 - Article
VL - 77
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 3
M1 - 035328
ER -