dorsal/arxiv
View SchemaInversion of exciton level splitting in quantum dots
| Authors | R. J. Young, R. M. Stevenson, A. J. Shields, P. Atkinson, K. Cooper, D. A. Ritchie, K. M. Groom, A. I. Tartakovskii, M. S. Skolnick |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0601198 |
| URL | https://arxiv.org/abs/quant-ph/0601198 |
| DOI | 10.1103/PhysRevB.72.113305 |
| Journal | Phys. Rev. B 72, 113305 (2005) |
Abstract
The demonstration of degeneracy of the exciton spin states is an important step towards the production of entangled photons pairs from the biexciton cascade. We measure the fine structure of exciton and biexciton states for a large number of single InAs quantum dots in a GaAs matrix; the energetic splitting of the horizontally and vertically polarised components of the exciton doublet is shown to decrease as the exciton confinement decreases, crucially passing through zero and changing sign. Thermal annealing is shown to reduce the exciton confinement, thereby increasing the number of dots with splitting close to zero.
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"abstract": "The demonstration of degeneracy of the exciton spin states is an important\nstep towards the production of entangled photons pairs from the biexciton\ncascade. We measure the fine structure of exciton and biexciton states for a\nlarge number of single InAs quantum dots in a GaAs matrix; the energetic\nsplitting of the horizontally and vertically polarised components of the\nexciton doublet is shown to decrease as the exciton confinement decreases,\ncrucially passing through zero and changing sign. Thermal annealing is shown to\nreduce the exciton confinement, thereby increasing the number of dots with\nsplitting close to zero.",
"arxiv_id": "quant-ph/0601198",
"authors": [
"R. J. Young",
"R. M. Stevenson",
"A. J. Shields",
"P. Atkinson",
"K. Cooper",
"D. A. Ritchie",
"K. M. Groom",
"A. I. Tartakovskii",
"M. S. Skolnick"
],
"categories": [
"quant-ph",
"cond-mat.other"
],
"doi": "10.1103/PhysRevB.72.113305",
"journal_ref": "Phys. Rev. B 72, 113305 (2005)",
"title": "Inversion of exciton level splitting in quantum dots",
"url": "https://arxiv.org/abs/quant-ph/0601198"
},
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