阅读说明：本技术 基于温度响应的光波前调制装置和方法 (Optical wavefront modulation device and method based on temperature response ) 是由 刘娟 阿塔奥 韩遇 于 2020-04-13 设计创作，主要内容包括：提供一种基于温度响应的光波前调制装置,其包括：第一层,其包含水凝胶,该第一层具有相对的第一表面和第二表面；以及多个第一微纳结构单元,其间隔排列在所述第一表面。通过改变所述第一层的温度,可以改变相邻的第一微纳结构单元之间的距离,调整相邻的第一微纳结构单元之间的耦合强度或耦合状态,实现对出射光的动态波前调制。(There is provided an optical wavefront modulation device based on temperature response, comprising: a first layer comprising a hydrogel, the first layer having opposing first and second surfaces; and the first micro-nano structure units are arranged on the first surface at intervals. By changing the temperature of the first layer, the distance between the adjacent first micro-nano structure units can be changed, the coupling strength or the coupling state between the adjacent first micro-nano structure units is adjusted, and the dynamic wave-front modulation of emergent light is realized.)

1. An optical wavefront modulation device based on temperature response, comprising:

a first layer comprising a hydrogel, the first layer having opposing first and second surfaces; and

and the plurality of first micro-nano structure units are arranged on the first surface at intervals.

2. The temperature response based optical wavefront modulation device of claim 1 further comprising a second layer disposed below the first layer and in contact with the second surface.

3. The optical wavefront modulation device based on the temperature response of claim 1 or 2, wherein the plurality of first micro-nano structure units form a resonator array.

4. The temperature response based optical wavefront modulation device of claim 2 wherein the second layer is a substrate having light reflecting or light transmitting properties.

5. The temperature response-based optical wavefront modulation device of claim 4, wherein the substrate is a metal substrate or a glass substrate.

6. The optical wavefront modulation device according to claim 1 or 2, further comprising a plurality of second micro-nano structure units, wherein the plurality of second micro-nano structure units are arranged on the first surface at intervals.

7. The optical wavefront modulation device according to claim 6, wherein the first and second micro-nano structure units are arranged in a staggered manner.

8. The optical wavefront modulation device according to claim 6, wherein the coupling distance between the first micro-nano structure units is different from the coupling distance between the second micro-nano structure units.

9. The optical wavefront modulation device according to claim 1 or 2, further comprising a temperature adjusting unit for changing a temperature of the first layer to change a distance between adjacent first micro-nano structure units and adjusting a coupling strength or a coupling state between adjacent first micro-nano structure units.

10. A method for modulating wavefront of light by using the temperature response-based wavefront modulation device according to any one of claims 1 to 9, wherein the temperature of the first layer is changed to change the distance between the adjacent first micro-nano structure units, and the coupling strength or the coupling state between the adjacent first micro-nano structure units is adjusted to realize dynamic wavefront modulation of emergent light.

Technical Field

The invention relates to an optical wavefront modulation device and method based on temperature response, and belongs to the field of micro-nano optics.

Background

At present, technologies such as electric control, mechanical drive, chemical exposure, optical pumping, temperature control and the like can realize dynamic modulation of optical wavefront, but the technologies are difficult to realize simultaneous modulation of two polarization components of light and are not suitable for integration.

In addition, the metasurface can modulate the wavefront at a pixel level, for example, chinese patent Z L201811090766.8 discloses a method for realizing wavefront modulation based on a medium conformal metasurface, in which a metasurface unit structure is designed, the metasurface is composed of medium circular nano-cylinder arrays with different geometric sizes, the metasurface arbitrarily regulates and controls the phase of an outgoing beam by changing the geometric radius and height of the nano-cylinder units, the phase distribution of the incoming light passing through the curved surface is calculated according to a light tracing method or a time domain finite difference method FDTD only when a single curved surface is considered, and then the phase distribution of a user customized function is calculated according to a diffraction theory or a holographic principle analysis method, so that the phase difference between the two is compensated by the medium conformal metasurfaces to encode the metasurface phase.

However, the post-processing structure in current metasurfaces is fixed, which results in that the current metasurfaces cannot achieve dynamic modulation of the light wavefront.

In view of the above, the present invention aims to provide an optical wavefront modulation device and method based on temperature response to solve one or more of the above technical problems.

Disclosure of Invention

To solve one or more technical problems in the prior art, according to an aspect of the present invention, there is provided an optical wavefront modulation device based on temperature response, including:

a first layer having an expanded state and a contracted state as a function of temperature, the first layer having opposing first and second surfaces; and

and the plurality of first micro-nano structure units are arranged on the first surface at intervals.

According to another aspect of the invention, the optical wavefront modulation device based on temperature response further comprises a second layer disposed below the first layer and in contact with the second surface.

According to another aspect of the invention, the plurality of first micro-nano structure units form a resonator array, and the first layer comprises hydrogel.

According to yet another aspect of the invention, the second layer is a substrate having light reflecting or light transmitting properties.

According to still another aspect of the present invention, the substrate is a metal substrate or a glass substrate.

According to another aspect of the invention, the optical wavefront modulation device based on the temperature response further comprises a plurality of second micro-nano structure units, and the plurality of second micro-nano structure units are arranged on the first surface at intervals.

According to another aspect of the invention, the first and second micro-nano structure units are staggered.

According to another aspect of the invention, the coupling distance between the first micro-nano structure units is different from the coupling distance between the second micro-nano structure units.

According to another aspect of the invention, the optical wavefront modulation device based on the temperature response further comprises a temperature adjusting unit, which is used for changing the temperature of the first layer to change the distance between the adjacent first micro-nano structure units and adjusting the coupling strength or the coupling state between the adjacent first micro-nano structure units.

According to another aspect of the invention, a method for performing wavefront modulation by using the wavefront modulation device based on temperature response is provided, wherein the temperature of the first layer is changed to change the distance between the adjacent first micro-nano structure units, and the coupling strength or the coupling state between the adjacent first micro-nano structure units is adjusted to realize dynamic wavefront modulation on emergent light.

Compared with the prior art, the invention has one or more of the following technical effects:

firstly, the isotropic and anisotropic resonators are arranged on the metasurface to serve as modulation units, so that the two polarization components of incident light can be independently modulated;

secondly, the thermal response type first layer such as hydrogel can expand below the critical temperature and collapse above the critical temperature, resonators (micro-nano structure units) are arranged on the surface of the first layer, so that the effect of performing dynamic temperature control modulation on incident light and reflected light by a metastructure can be realized, and the product is easy to integrate;

thirdly, the invention can be used in the fields of data compression, wave front selection, lens design, data transmission, anti-counterfeiting technology, holographic display and the like, and provides a new light wave front modulation scheme.

Drawings

So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments. The drawings relate to preferred embodiments of the invention and are described below:

FIG. 1 is a schematic structural diagram of an optical wavefront modulation device based on temperature response according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an optical wavefront modulation device based on temperature response according to another preferred embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an optical wavefront modulation device based on temperature response according to another preferred embodiment of the present invention;

fig. 4 is a schematic structural diagram of an optical wavefront modulation device based on temperature response according to still another preferred embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Reference will now be made in detail to the various embodiments, one or more examples of which are illustrated in each figure. The examples are provided by way of explanation and are not meant as limitations. For example, features illustrated or described as part of one embodiment can be used on or in conjunction with any other embodiment to yield yet a further embodiment. It is intended that the present invention encompass such modifications and variations.

In the following description of the drawings, like reference numerals designate identical or similar structures. Generally, only the differences between the individual embodiments will be described. Descriptions of parts or aspects in one embodiment can also be applied to corresponding parts or aspects in another embodiment, unless explicitly stated otherwise.