Nonlinear wavefront control by geometric-phase metasurfaces: Influence of mode field and rotational symmetry
点击次数：
影响因子：10.05
DOI码：10.1002/adom.201902050
发表刊物：Advanced Optical Materials
关键字：geometric-phases; holograms; metasurfaces; nonlinear optics
摘要：Nonlinear Pancharatnam-Berry phase metasurfaces facilitate the nontrivial phase modulation for frequency conversion processes by leveraging photon-spin dependent nonlinear geometric-phases. However, plasmonic metasurfaces show some severe limitation for nonlinear frequency conversion due to the intrinsic high ohmic loss and low damage threshold of plasmonic nanostructures. Here, the nonlinear geometric-phases associated with the third-harmonic generation process occurring in all-dielectric metasurfaces is studied systematically, which are composed of silicon nanofins with different in-plane rotational symmetries. It is found that the wave coupling among different field components of the resonant fundamental field gives rise to the appearance of different nonlinear geometric-phases of the generated third-harmonic signals. The experimental observations of the nonlinear beam steering and nonlinear holography realized in this work by all-dielectric geometric-phase metasurfaces are well explained with the developed theory. This work offers a new physical picture to understand the nonlinear optical process occurring at nanoscale dielectric resonators and will help in the design of nonlinear metasurfaces with tailored phase properties.
合写作者：Basudeb Sain,Bernhard Reineke,Ruizhe Zhao,Cedrik Meier
第一作者：Bingyi Liu
论文类型：期刊论文
通讯作者：Lingling Huang,Yongyuan Jiang,Thomas Zentgraf
论文编号：000516851800001
学科门类：理学
文献类型：J
卷号：8
期号：9
字数：5000
ISSN号：ISSN 2195-1071
是否译文：否
发表时间：2020-02-28
收录刊物：SCI
发布期刊链接：https://onlinelibrary.wiley.com/doi/full/10.1002/adom.201902050