Cascaded ultrabright source of polarization-entangled photons

被引：18
|
作者：
Bitton, G [1 ]
Grice, WP [1 ]
Moreau, J [1 ]
Zhang, L [1 ]
机构：
[1] Oak Ridge Natl Lab, Ctr Engn Sci Adv Res, Ctr Math & Comp Sci, Oak Ridge, TN USA
来源：
PHYSICAL REVIEW A | 2002年 / 65卷 / 06期
关键词：
D O I：
10.1103/PhysRevA.65.063805
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An ultrabright source of polarization-entangled photons has been realized using type-II phase matching in the spontaneous parametric down-conversion process in two cascaded crystals. The optical axes of the crystals are aligned in such a way that the extraordinarily (ordinarily) polarized cone from one crystal overlaps with the ordinarily (extraordinarily) polarized cone from the second crystal. This spatial overlapping removes the association between the polarization and the output angle of the photons that exists in a single type-II down-conversion process. Hence, entanglement of photon pairs originating from any conjugate points on the output cones is possible if a suitable optical delay line is used. This delay line is particularly simple and easy to implement.
引用
收藏
页码：638051 / 638057
页数：7
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