Title :
Type-I Quasi-Phase-Matched Waveguide Device for Polarization-Entangled Twin Photon Generation
Author :
Kawashima, Jotaro ; Fujimura, Masatoshi ; Suhara, Toshiaki
Author_Institution :
Dept. of Electr., Electron. & Inf. Eng., Grad. Sch. of Eng., Osaka Univ., Suita
fDate :
5/1/2009 12:00:00 AM
Abstract :
Quantum-entangled twin photons are expected to play an important role in future quantum communications and information processing. We propose and demonstrate a Type-I quasi-phase-matched (QPM) nonlinear-optic (NLO) LiNbO3 waveguide device for high-efficiency polarization-entangled twin photon generation. The device consists of a Ti:LiNbO3 channel waveguide, a ferroelectric domain-inverted grating for Type-I QPM, and a thin-film half-wave plate for polarization conversion at the center of the NLO interaction region. Generation of polarization-entangled twin-photons is demonstrated through quantum interference experiment.
Keywords :
integrated optics; lithium compounds; optical waveguides; quantum entanglement; quantum optics; titanium; LiNbO3:Ti; ferroelectric domain-inverted grating; information processing; nonlinear optic waveguide device; polarization-entangled twin photon generation; quantum communications; quantum entanglement; quantum interference; thin-film half-wave plate; type-I quasiphase-matched waveguide device; Integrated optics; quantum entanglement; quasi-phase matching (QPM); twin photon;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2014965
