Open AccessGeneration of high-purity entangled photon pairs using silicon wire waveguide
Author(s) -
K. Harada,
Hiroki Takesue,
Hiroshi Fukuda,
Tai Tsuchizawa,
T. Watanabe,
Koji Yamada,
Y. Tokura,
S. Itabashi
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.020368
Subject(s) - optics , photon , physics , silicon , coincidence counting , waveguide , dispersion (optics) , coincidence , four wave mixing , visibility , photon entanglement , interference (communication) , bin , materials science , optoelectronics , quantum entanglement , nonlinear optics , laser , telecommunications , quantum mechanics , quantum , medicine , alternative medicine , pathology , channel (broadcasting) , algorithm , computer science
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.