Tailored quantum dots for entangled photon pair creation

A  Greilich; M  Schwab; T  Berstermann; T  Auer; R  Oulton; D R  Yakovlev; M  Bayer; V  Stavarache; D  Reuter; A  Wieck

doi:10.1103/PhysRevB.73.045323

Tailored quantum dots for entangled photon pair creation

A Greilich, M Schwab, T Berstermann, T Auer, R Oulton, D R Yakovlev, M Bayer, V Stavarache, D Reuter, A Wieck

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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. Postgrowth 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.

Original language	English
Article number	045323
Pages (from-to)	-
Number of pages	4
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	73
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.73.045323
Publication status	Published - Jan 2006

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Photonics and Quantum

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title = "Tailored quantum dots for entangled photon pair creation",

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. Postgrowth 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.",

author = "A Greilich and M Schwab and T Berstermann and T Auer and R Oulton and Yakovlev, {D R} and M Bayer and V Stavarache and D Reuter and A Wieck",

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T1 - Tailored quantum dots for entangled photon pair creation

AU - Greilich, A

AU - Schwab, M

AU - Berstermann, T

AU - Auer, T

AU - Oulton, R

AU - Yakovlev, D R

AU - Bayer, M

AU - Stavarache, V

AU - Reuter, D

AU - Wieck, A

PY - 2006/1

Y1 - 2006/1

N2 - 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. Postgrowth 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.

AB - 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. Postgrowth 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.

U2 - 10.1103/PhysRevB.73.045323

DO - 10.1103/PhysRevB.73.045323

M3 - Article (Academic Journal)

SN - 1098-0121

VL - 73

SP - -

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

IS - 4

M1 - 045323

ER -

Tailored quantum dots for entangled photon pair creation

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