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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 25 — Dec. 8, 2008
  • pp: 20368–20373

Generation of high-purity entangled photon pairs using silicon wire waveguide

Ken-ichi Harada, Hiroki Takesue, Hiroshi Fukuda, Tai Tsuchizawa, Toshifumi Watanabe, Koji Yamada, Yasuhiro Tokura, and Sei-ichi Itabashi  »View Author Affiliations


Optics Express, Vol. 16, Issue 25, pp. 20368-20373 (2008)
http://dx.doi.org/10.1364/OE.16.020368


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Abstract

We observed high-purity correlated and entangled photon pairs generated through spontaneous four-wave mixing (SFWM) in a silicon wire waveguide (SWW). Employing a nano-scale silicon waveguide with a low loss mode size converter, we obtained a high coincidence to accidental coincidence ratio (CAR) of around 200 that was larger than that of cooled dispersion shifted fiber (DSF) by a factor 3.2, and observed the two-photon interference fringe of time-bin entangled photons with >95% visibility without subtracting the accidental coincidences.

© 2008 Optical Society of America

OCIS Codes
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

History
Original Manuscript: October 22, 2008
Revised Manuscript: November 19, 2008
Manuscript Accepted: November 20, 2008
Published: November 24, 2008

Citation
Ken-ichi Harada, Hiroki Takesue, Hiroshi Fukuda, Tai Tsuchizawa, Toshifumi Watanabe, Koji Yamada, Yasuhiro Tokura, and Sei-ichi Itabashi, "Generation of high-purity entangled photon pairs using silicon wire waveguide," Opt. Express 16, 20368-20373 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-25-20368


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