Dielectric metamaterials with effective self-duality and full-polarization omnidirectional brewster effect  

作　　者：Hao Luo Jie Luo Zhihui Zhang Chao Wu Quan Li Wei Liu Ruwen Peng Mu Wang Hongqiang Li Yun Lai 

机构地区：[1]National Laboratory of Solid State Microstructures,School of Physics,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China [2]School of Physical Science and Technology&Jiangsu key Laboratory of Frontier Material Physics and Devices,Soochow University,Suzhou 215006,China [3]School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [4]College of Electronic and Information Engineering,Tongji University,Shanghai 200092,China [5]College for Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha,Hunan 410073,China

出　　处：《Light(Science & Applications)》2024年第11期2680-2687,共8页光（科学与应用)（英文版）

基　　金：the National Key R&D Program of China(Grants Nos.2022YFA1404303,2020YFA0211300);the National Natural Science Foundation of China(Grants Nos.12174188,11974176,12474293,12374293,12234010,11874286);Natural Science Foundation of Jiangsu Province(Grant No.BK20221354).

摘　　要：Conventional dielectric solid materials,both natural and artifcial,lack electromagnetic self-duality and thus require additional coatings to achieve impedance matching with free space.Here,we present a class of dielectric metamaterials that are effectively self-dual and vacuum-like,thereby exhibiting full-polarization omnidirectional impedance matching as an unusual Brewster effect extended across all incident angles and polarizations.With both birefringence and reflection eliminated regardless of wavefront and polarization,such anisotropic metamaterials could establish the electromagnetic equivalence with"stretched free space"in transformation optics,as substantiated through full-wave simulations and microwave experiments.Our findings open a practical pathway for realizing unprecedented polarization-independence and omnidirectional impedance-matching characteristics in pure dielectric solids.

关 键 词：directional DUALITY DIELECTRIC 

分 类 号：TB34[一般工业技术—材料科学与工程]