Transforming spatial entanglement using a domain-engineering technique.
We study the spatial correlation of a two-photon entangled state produced in a multistripe periodically poled LiTaO3 crystal by spontaneous parametric down-conversion. The far-field diffraction-interference experiments reveal that the transverse modulation of domain patterns transforms the spatial mode function of the two-photon state. This result offers an approach to prepare a novel type of two-photon state with a unique spatial entanglement by using a domain-engineering technique.
Yu
X Q
XQ
National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China.
Xu
P
P
Xie
Z D
ZD
Wang
J F
JF
Leng
H Y
HY
Zhao
J S
JS
Zhu
S N
SN
Ming
N B
NB