Chirality-selected second-harmonic holography with phase and binary amplitude manipulation
Chirality-selected second-harmonic holography with phase and binary amplitude manipulation
复制标题
具有相位和二元振幅操纵的手性选择二次谐波全息术
DOI：
10.1039/d0nr03431b
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发表时间：
2020
期刊：
影响因子：
6.7
通讯作者：
Lu Peixiang
中科院分区：
文献类型：
--
作者：
Zhao Wenchao;Wang Kai;Hong Xuanmiao;Wang Bingxia;Han Xiaobo;Long Hua;Wang Bing;Lu Peixiang
Recently, multi-functional nonlinear wavefront control has attracted extensive attention. In particular, nonlinear holography can carry information and has potential for application in information encoding and computing. However, it is quite challenging because it puts forward higher requirements with nonlinear conversion efficiency and wavefront control performance. Here, we propose and experimentally demonstrate chirality-selected second-harmonic (SH) holography based on a Au–WS2 nonlinear optical interface. It is realized using nonlinear geometry phase control with a sub-wavelength resolution. Furthermore, binary amplitude manipulation is introduced by replacing specific rectangular nanoholes with square nanoholes. This indicates that the average intensity of holograms is increased by 39% and the hologram variation coefficient is decreased by 44% in comparison with that in pure geometry phase control. In addition, the SH signal from the monolayer WS2 with a large second-order susceptibility is further enhanced by the strong local-field in Au nanoholes, leading to a high SH conversion efficiency of 10−6. Therefore, it offers an important stepping stone towards multi-functional SH holography, which may have potential for application in nonlinear information encoding and processing.
