Transverse compression of two-photon wave packets

被引：0
|
作者：
Chekhova, M. V. [1 ]
Shumilkina, O. A. [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia
来源：
JETP LETTERS | 2010年 / 91卷 / 12期
基金：
俄罗斯基础研究基金会;
关键词：
JETP Letter; Angular Spectrum; Correlation Radius; Spatial Correlation Function; Field Zone;
D O I：
10.1134/S0021364010120076
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A method for generating two-photon wave packets (biphotons) with a small width of the spatial intensity correlation function (correlation radius) has been considered. We propose to prepare a two-photon wave packet inhomogeneously broadened in the angle by means of spontaneous parametric down-conversion in an inhomogeneous crystal. Such biphotons are not diffraction limited; i.e., their correlation radius is much larger than the inverse width of the spatial spectrum. However, the correlation radius of such a biphoton decreases as the biphoton propagates in free space, and transverse compression occurs at a certain distance from the crystal; i.e., the biphoton becomes diffraction limited.
引用
收藏
页码：649 / 654
页数：6
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