Optical device based on metasurface-electric dimming material and preparation method thereof

Abstract

The invention discloses an optical device based on a metasurface-electric dimming material. The optical device comprises an electric dimming material layer and a nano grating layer, and has the characteristics of a reflective filter by utilizing the coherent cancellation or coherent phase length performance when light irradiates to a waveguide nano grating layer; and the reflective filtering characteristic of the nano grating layer is controlled to be opened or closed by utilizing different refractive indexes of the electric dimming material layer in a coloring state and a fading state. The preparation method of the optical device based on the metasurface-electric dimming material comprises the following steps of: a) preparing an upper electrode layer; b) preparing a grating layer; c) preparing an electric dimming material layer; d) preparing an electrolyte layer; e) preparing an ion storage layer; and f) preparing a lower electrode layer and a lower substrate. The optical device disclosed by the invention not only can be used as a monochromatic filter with pure color and applied to an optical display system, an optical anti-counterfeiting system or an integrated optical system, but further can be used as an anti-counterfeiting display screen by utilizing the color development function of the electric dimming material layer.

Description

technical field [0001] The present invention relates to an optical device and a preparation method thereof, more specifically, to an optical device based on a metasurface-electric light-adjusting material and a preparation method thereof. Background technique [0002] In conventional optical devices, the manipulation of light waves is achieved by light propagating in a medium of a given refractive index, and changes in amplitude, phase, and polarization are accumulated through propagation in the medium, resulting in bulky and difficult-to-integrate devices. . The goal of miniaturization and integration of modern industry has promoted the birth and development of micro-nano optics. In recent years, the vigorous development of metasurfaces provides a way to overcome the above limitations. A metasurface is an ultra-thin artificial material composed of an array of micro-nano structures in subwavelength dimensions. Studies have shown that at the sub-wavelength size, the light ...

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Problems solved by technology

However, in general, once the nanostructures that make up the metasurface are prepared, they only have a single function, which lacks the flexibility of active control, which greatly limits its use in practice.

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