Spatial symmetries in nonlocal multipolar metasurfaces

作     者：Karim Achouri Ville Tiukuvaara Olivier J.F.Martin Karim Achouri;Ville Tiukuvaara;Olivier J.F.Martin

作者机构：Institute of Electrical and MicroengineeringÉcole Polytechnique Fédérale de LausanneNanophotonics and Metrology LaboratoryLausanneSwitzerland 

出 版 物：《Advanced Photonics》 (先进光子学（英文）)

年 卷 期：2023年第5卷第4期

页      面：9-22页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：We gratefully acknowledge funding from the Swiss National Science Foundation(Grant No.PZ00P2-193221) 

主　　题：spatial symmetries metamaterials bianisotropy multipoles chirality 

摘      要：We propose a framework that connects the spatial symmetries of a metasurface to its material parameter tensors and its scattering *** provides a simple and universal way to effortlessly determine the properties of a metasurface scattering response,such as chirality or asymmetric transmission,and which of its effective material parameters should be taken into account in the prospect of a homogenization *** contrast to existing techniques,this approach does not require any a priori knowledge of group theory or complicated numerical simulation schemes,hence making it fast,easy to use and *** working principle consists in recursively solving symmetry-invariance conditions that apply to dipolar and quadrupolar material parameters,which include nonlocal interactions,as well as the metasurface scattering *** overall process thus only requires listing the spatial symmetries of the *** the proposed framework,we demonstrate the existence of multipolar extrinsic chirality,which is a form of chiral response that is achieved in geometrically achiral structures sensitive to field gradients,even at normal incidence.