Enhancement of UV Second-Harmonic Radiation at Nonlinear Interfaces with Discontinuous Second-order Susceptibilities

被引：0
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作者：
Xiaohui Zhao
Yuanlin Zheng
Ning An
Huaijin Ren
Xuewei Deng
Xianfeng Chen
机构：
[1] Shanghai Jiao Tong University,School of Physics and Astronomy
[2] Shanghai Jiao Tong University,Collaborative Innovation Center of IFSA (CICIFSA)
[3] Shanghai Institute of Laser Plasma,Institute of Applied Electronics
[4] China Academy of Engineering Physics,Laser Fusion Research Center
[5] China Academy of Engineering Physics,undefined
来源：
Scientific Reports | / 8卷
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摘要：
We investigate the generation of ultraviolet (UV) second-harmonic radiation at the boundary of a UV transparent crystal, which is derived from the automatic partial phase matching of the incident wave and the total internal reflection. By adhering to another UV non-transparent crystal with a larger second-order nonlinear coefficient χ(2), a nonlinear interface with large disparity in χ(2) is formed and the enhancement of UV second-harmonic radiation is observed experimentally. The intensity of enhanced second harmonic wave generated at the nonlinear interface is up to 11.6 times that at the crystal boundary. As a tunable phase-matching method, it may suggest potential applications in the UV, and even vacuum-UV region.
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