Quasi-BIC strong circular dichroism-based chiral metasurface device design

The invention discloses a chiral metasurface device based on continuum quasi-bound state (Quasi-BIC) strong circular dichroism, the structure of the chiral metasurface device is composed of paired silicon (Si) dielectric rods embedded in an anisotropic medium, and each pair of dielectric rods has a...

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Bibliographic Details
Main Authors CHEN ZANHUI, YANG HONGYAN, XIAO GONGLI, SUN TANGYOU, CHEN KANG, WANG YANGPEIHUA, LIU XINGPENG, LI HAI'OU
Format Patent
LanguageChinese
English
Published 11.06.2024
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:The invention discloses a chiral metasurface device based on continuum quasi-bound state (Quasi-BIC) strong circular dichroism, the structure of the chiral metasurface device is composed of paired silicon (Si) dielectric rods embedded in an anisotropic medium, and each pair of dielectric rods has a small vertical displacement d to eliminate mirror symmetry. According to the design structure, strong CD response can be achieved within the near-infrared wavelength range of 650-700 nm, when circularly polarized light is incident in the forward direction (+ Z) or the backward direction (-Z), the structure can show opposite CD response, and the maximum CD response can be 1 in a rotation modulation mode. The method provided by the invention is novel and easy to implement, and is expected to make important contributions in the aspects of flexible tuning and chiral response enhancement of nano photonics in the future. 本发明公开一种基于连续体准束缚态(Quasi-BIC)强圆二色性的手性超表面器件，其结构由嵌入在各向异性介质中成对的硅(Si)介电棒构成，其中每对介电棒都有一个小的垂直位移d以消除镜像对称。本设计结构可
Bibliography:Application Number: CN202410467488