dorsal/arxiv
View SchemaTailored quantum dots for entangled photon pair creation
| Authors | A. Greilich, M. Schwab, T. Berstermann, T. Auer, R. Oulton, D. R. Yakovlev, M. Bayer, V. Stavarache, D. Reuter, A. Wieck |
|---|---|
| Categories | |
| ArXiv ID | physics/0601107 |
| URL | https://arxiv.org/abs/physics/0601107 |
| DOI | 10.1103/PhysRevB.73.045323 |
Abstract
We compare the asymmetry-induced exchange splitting delta_1 of the bright-exciton ground-state doublet in self-assembled (In,Ga)As/GaAs quantum dots, determined by Faraday rotation, with its homogeneous linewidth gamma, obtained from the radiative decay in time-resolved photoluminescence. Post-growth thermal annealing of the dot structures leads to a considerable increase of the homogeneous linewidth, while a strong reduction of the exchange splitting is simultaneously observed. The annealing can be tailored such that delta_1 and gamma become comparable, whereupon the carriers are still well confined. This opens the possibility to observe polarization entangled photon pairs through the biexciton decay cascade.
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"abstract": "We compare the asymmetry-induced exchange splitting delta_1 of the\nbright-exciton ground-state doublet in self-assembled (In,Ga)As/GaAs quantum\ndots, determined by Faraday rotation, with its homogeneous linewidth gamma,\nobtained from the radiative decay in time-resolved photoluminescence.\nPost-growth thermal annealing of the dot structures leads to a considerable\nincrease of the homogeneous linewidth, while a strong reduction of the exchange\nsplitting is simultaneously observed. The annealing can be tailored such that\ndelta_1 and gamma become comparable, whereupon the carriers are still well\nconfined. This opens the possibility to observe polarization entangled photon\npairs through the biexciton decay cascade.",
"arxiv_id": "physics/0601107",
"authors": [
"A. Greilich",
"M. Schwab",
"T. Berstermann",
"T. Auer",
"R. Oulton",
"D. R. Yakovlev",
"M. Bayer",
"V. Stavarache",
"D. Reuter",
"A. Wieck"
],
"categories": [
"physics.optics"
],
"doi": "10.1103/PhysRevB.73.045323",
"title": "Tailored quantum dots for entangled photon pair creation",
"url": "https://arxiv.org/abs/physics/0601107"
},
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