Multi-polarization-state multifunctional super-structure lens based on spatial multiplexing and manufacturing method of multi-polarization-state multifunctional super-structure lens

Abstract

The invention discloses a multi-polarization-state multifunctional super-structure lens based on spatial multiplexing and a manufacturing method thereof.The multifunctional super-structure lens comprises a substrate layer, a first type of structural unit and a second type of structural unit, the first type of structural unit and the second type of structural unit are arranged on the substrate layer, and the first type of structural unit is rectangular nano-columns with different lengths and widths; the first type of structural units are rectangular nano-columns with the same size and different rotating angles, the second type of structural units are rectangular nano-columns with the same size and different rotating angles, the first type of structural units and the second type of structural units are arranged on the substrate layer in a staggered mode according to the spatial multiplexing principle, preset phases of incident light in different polarization states are correspondingly met, and orthogonal linearly polarized light and circularly polarized light are enabled to be subjected to off-axis and on-axis focusing on a confocal plane respectively; and the first type of structural units and the second type of structural units realize regulation and control of orthogonal linearly polarized light and circularly polarized light through transmission phases and geometric phases respectively. According to the multifunctional super-structure lens, three-polarization-state regulation and control and coplanar zooming can be achieved under the single wavelength, and the problems that an existing multifunctional super-structure lens can only be subjected to dual-polarization-state regulation and control, and the focal plane changes after regulation and control are solved.

Description

technical field [0001] The invention relates to the fields of artificial electromagnetic materials and micro-nano photonics, in particular to a multi-polarization-state multifunctional metalens based on space multiplexing and a manufacturing method thereof. Background technique [0002] Metalens is a planar optical device composed of subwavelength structural units, which has excellent electromagnetic properties and can make up for the shortcomings of traditional lenses that are bulky and difficult to integrate. In existing designs, various polarization-dependent and polarization-independent metalenses have been widely studied, but multifunctional metalenses controlled by polarization have not been fully studied, so the design of multifunctional metalenses that realize polarization control has the potential Significance. [0003] In order to realize the design of polarization-controlled multifunctional metalenses, researchers at home and abroad have carried out many related ...

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Problems solved by technology

[0005] The main purpose of the present invention is to overcome the defects of the above-mentioned background technology, provide a multi-polarization-state multifunctional metalens and its manufacturing method based on spatial multiplexing, realize three-polarization state regulation and coplanar zooming at a single wavelength, and overcome the existing There is a problem that the multifunctional metalens can only be adjusted by dual polarization states and the focal plane changes after the adjustment

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