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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 5 — Feb. 27, 2012
  • pp: 5335–5342

Cavity-assisted emission of polarization-entangled photons from biexcitons in quantum dots with fine-structure splitting

Stefan Schumacher, Jens Förstner, Artur Zrenner, Matthias Florian, Christopher Gies, Paul Gartner, and Frank Jahnke  »View Author Affiliations


Optics Express, Vol. 20, Issue 5, pp. 5335-5342 (2012)
http://dx.doi.org/10.1364/OE.20.005335


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Abstract

We study the quantum properties and statistics of photons emitted by a quantum-dot biexciton inside a cavity. In the biexciton-exciton cascade, fine-structure splitting between exciton levels degrades polarization-entanglement for the emitted pair of photons. However, here we show that the polarization-entanglement can be preserved in such a system through simultaneous emission of two degenerate photons into cavity modes tuned to half the biexciton energy. Based on detailed theoretical calculations for realistic quantum-dot and cavity parameters, we quantify the degree of achievable entanglement.

© 2012 OSA

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.5565) Quantum optics : Quantum communications
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:
Quantum Optics

History
Original Manuscript: January 13, 2012
Revised Manuscript: February 13, 2012
Manuscript Accepted: February 13, 2012
Published: February 17, 2012

Citation
Stefan Schumacher, Jens Förstner, Artur Zrenner, Matthias Florian, Christopher Gies, Paul Gartner, and Frank Jahnke, "Cavity-assisted emission of polarization-entangled photons from biexcitons in quantum dots with fine-structure splitting," Opt. Express 20, 5335-5342 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-5-5335


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