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Device, zooming method and application for metalens zooming based on polarization state regulation

A superlens and polarization state technology, which is applied in the optical field, can solve the problem of zooming method that no one has proposed, and achieve the effects of simple design, simple device structure, and small manufacturing error.

Active Publication Date: 2022-02-18
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, chirality is an attribute of nature. The analysis, detection, and evolution of chiral structures, materials, and objects urgently require polarization-controlled zoom metalens that are sensitive to circularly polarized light. no one raised

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  • Device, zooming method and application for metalens zooming based on polarization state regulation
  • Device, zooming method and application for metalens zooming based on polarization state regulation
  • Device, zooming method and application for metalens zooming based on polarization state regulation

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Embodiment 1

[0071] This embodiment is used to illustrate the structure of the polarization-regulating metalens of the present invention.

[0072] Taking advantage of the advantage of subwavelength nanostructures in controlling the wavefront with a large degree of freedom, a metalens can be designed to focus left-handed and right-handed polarized light at different positions on the optical axis, such as figure 1 shown. The polarization control metalens involved in the present invention is a transmissive element, and the left-handed light is focused at F 1 At , the dextrorotatory light is focused at F 2 place. Incident light of other polarization states is focused at F 1 in F 2 In between, the optical zoom based on the polarization-regulated metalens is realized.

[0073] The basic unit of a polarization-tuning metalens is a subwavelength superatomic unit on a substrate, such as figure 2 (a) shown. The design proposed by the present invention is applicable to various wavelength band...

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Abstract

The present invention provides a device for realizing zooming of a superlens based on polarization regulation. The lens is placed behind the linear polarizer and the quarter-wave plate, and the quarter-wave plate is rotated so that incident light with different polarization states can be focused at different positions in the image space to achieve zooming. Its zooming method and application are also provided. The device of the invention is simple in structure, small in size, compatible with semiconductor technology, and easy to integrate and mass produce. The invention provides a new means and method for biomedical detection, material analysis, chiral evolution research and the like which are sensitive to circularly polarized light.

Description

technical field [0001] The invention belongs to the field of optics, and in particular relates to a device, a zooming method and an application for realizing hyperlens zooming based on polarization state regulation. Background technique [0002] Optical zoom is an important indicator for evaluating the performance of various digital devices such as mobile phones, cameras, and projectors. Usually optical zoom uses the zoom ratio (magnification) to reflect the zoom capability, that is, the ratio of the long focus position to the short focus position. The focal length of a single lens is difficult to change regularly, so it is necessary to adjust the position of the entire lens group to coordinate the focal length of the entire system. And if you want to get a larger zoom factor, you need a larger internal space to install the lens and increase the movement space. At present, the zoom system is divided into four types: optical compensation type, mechanical compensation type, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B13/32G02B27/28
CPCG03B13/32G02B27/286
Inventor 王文涛董凤良褚卫国
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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