title: Transforming spatial entanglement using a domain-engineering technique.
abstract: 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.
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China.
authors.forename: X Q
authors.initials: XQ
authors.lastname: Yu
authors.forename: P
authors.initials: P
authors.lastname: Xu
authors.forename: Z D
authors.initials: ZD
authors.lastname: Xie
authors.forename: J F
authors.initials: JF
authors.lastname: Wang
authors.forename: H Y
authors.initials: HY
authors.lastname: Leng
authors.forename: J S
authors.initials: JS
authors.lastname: Zhao
authors.forename: S N
authors.initials: SN
authors.lastname: Zhu
authors.forename: N B
authors.initials: NB
authors.lastname: Ming