Polarizing device based on double-column dielectric metasurface

Abstract

The invention discloses a polarization device based on a double-column dielectric metasurface, which comprises a dielectric substrate and a dielectric nano-column array, the dielectric nano-column array comprises N groups of diatomic super-structure molecules, N is greater than or equal to 2, the diatomic super-structure molecules are positioned on the dielectric substrate, and N is greater than or equal to 1. The double-atom super-structure molecule comprises two nano-columns with the same size, different included angles are formed between the centers of the two nano-columns and the horizontal direction, and the two nano-columns are located on a dielectric substrate to form a double-column dielectric super-surface. The amplitude and polarization of the diffracted light can be independently regulated and controlled at the same time by regulating and controlling the size of the diatomic superstructure molecule and the difference / sum of the rotation angles of the two nanorods. According to the invention, the amplitude and polarization of the diffracted light are independently regulated and controlled at the same time by using the dielectric diatomic structure, the degree of freedom is increased, the application potential of metasurface polarization optics is excited, and more metasurface application scenes are provided.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a polarizing device based on a double-column dielectric metasurface. Background technique [0002] In order to meet the urgent needs of information security markets such as anti-counterfeiting and ID cards, higher requirements are put forward for applications such as information reuse and concealment technology. As one of the basic properties of light, polarization has important practical significance in this respect. Since Malius' law involves the intensity of polarized light passing through a polarizer, the orthogonal polarization state is generally considered to be a necessary condition for its application in information multiplexing and hiding technologies. Recent advances in metasurfaces, ultrathin platforms that modulate light fields in a spatially varying manner, open new avenues for wavefront shaping in multiple polarization optics and facilitate sophisticated informati...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of limited freedom of polarization multiplexing and low security of information multiplexing hiding technology, and provides a polarizing device based on double-column dielectric metasurface

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