title: Nonlinear Cherenkov radiation at the interface of two different nonlinear media.
abstract: We discuss the nonlinear response due to the spatial modulation of the second-order susceptibility at the interface between two nonlinear media, and experimentally demonstrate that the nonlinear Cherenkov radiation is enhanced by the interface of two nonlinear crystals with a large disparity in χ(2). In our experiment, the intensity of the nonlinear Cherenkov radiation generated at the nonlinear interface was approximately 4 to 10 times that at the crystal boundary. This result suggests potential applications to efficient frequency conversion.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Zhao
authors.forename: Yuanlin
authors.initials: Y
authors.lastname: Zheng
authors.forename: Huaijin
authors.initials: H
authors.lastname: Ren
authors.forename: Ning
authors.initials: N
authors.lastname: An
authors.forename: Xuewei
authors.initials: X
authors.lastname: Deng
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Chen