阅读说明：本技术 一种基于超材料波导阵列的入射波调控方法和装置 (Incident wave regulation and control method and device based on metamaterial waveguide array ) 是由 梁子贤 许杏 李志海 于 2020-03-13 设计创作，主要内容包括：本申请属于超材料技术领域,尤其涉及一种基于超材料波导阵列的入射波调控方法和装置,入射波调控方法包括：获取针对入射波的调控需求和入射波的入射波长；根据入射波长构建波导单元,其中,波导单元的长度和宽度小于入射波长,波导单元内设置有可旋转的椭圆形结构,波导和椭圆形结构均由满足诺伊曼边界条件的材料组成；根据波导单元、入射波长和法布里-珀罗共振条件构建阵列,其中,阵列包括多条波导通道,波导通道包括多个波导单元；根据调控需求分别旋转波导阵列中各波导通道中的椭圆形结构；使用旋转后的波导阵列对入射波进行调控。本实施例的波导阵列结构简单、灵活可调,可以简单快捷地对入射波进行调控。(The application belongs to the technical field of metamaterials, and particularly relates to an incident wave regulation and control method and device based on a metamaterial waveguide array, wherein the incident wave regulation and control method comprises the following steps: acquiring regulation and control requirements aiming at incident waves and incident wavelengths of the incident waves; constructing a waveguide unit according to an incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noemann boundary condition; constructing an array according to the waveguide unit, the incident wavelength and the Fabry-Perot resonance condition, wherein the array comprises a plurality of waveguide channels, and each waveguide channel comprises a plurality of waveguide units; respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to regulation and control requirements; and regulating and controlling incident waves by using the rotated waveguide array. The waveguide array of the embodiment has a simple, flexible and adjustable structure, and can simply and quickly regulate and control incident waves.)

1. An incident wave regulation and control method based on a metamaterial waveguide array is characterized by comprising the following steps:

acquiring regulation and control requirements aiming at incident waves and incident wavelengths of the incident waves;

constructing a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noemann boundary condition;

constructing a waveguide array according to the waveguide units, the incident wavelength and a Fabry-Perot resonance condition, wherein the waveguide array comprises a plurality of waveguide channels, and the waveguide channels comprise a plurality of waveguide units;

respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements;

and regulating and controlling the incident wave by using the rotated waveguide array.

2. The incident wave modulation method of claim 1, wherein the elliptical structure is rotatable about a center of the elliptical structure, and the center of the elliptical structure coincides with a center of the waveguide unit.

3. The incident wave modulation method of claim 1, wherein the waveguide unit has a length and a width that are equal, and wherein the length and the width of the waveguide unit are less than or equal to 1/5 of the incident wavelength.

4. The incident wave modulation method according to claim 1, wherein when the modulation requirement is a requirement for performing super-resolution imaging, the rotating the elliptical structure in each waveguide channel of the waveguide array according to the modulation requirement comprises:

acquiring a transmission peak angle at which the waveguide array resonates under the incident wave;

rotating the elliptical structure in each of the waveguide channels in the waveguide array to the transmission peak angle.

5. The incident wave modulation method of claim 1, wherein when the modulation requirement is a requirement for forward focusing, the rotating the elliptical structures in each of the waveguide channels of the waveguide array according to the modulation requirement comprises:

acquiring a required focal length corresponding to the regulation and control requirement, and determining a focusing condition according to the required focal length;

when the distance between a first waveguide channel and a central waveguide channel in the waveguide array meets the focusing condition, determining that the target angle of the first waveguide channel is a first angle, and rotating all the elliptical structures in the first waveguide channel to the first angle, wherein the first waveguide channel is any one of the waveguide channels;

when the distance between the first waveguide channel and the central waveguide channel does not meet the focusing condition, determining that the target angle of the first waveguide channel is a second angle, and rotating all the elliptical structures in the first waveguide channel to the second angle.

6. The incident wave modulation method of claim 5, wherein the determining a focusing condition according to the required focal length comprises:

determining the focusing condition using the following formula:

wherein x is_iFor the focusing condition, round { } is a rounding approximation function, λ is the incident wavelength, and f is the desired focal length.

7. The incident wave modulation method according to claim 1, wherein when the modulation requirement is a requirement for performing wavefront transformation, the rotating the elliptical structure in each of the waveguide channels in the waveguide array according to the modulation requirement comprises:

determining a transformation condition corresponding to the wavefront transformation according to the regulation and control requirement;

determining a second waveguide channel with a target angle of a first angle in the waveguide array based on the transformation condition, and determining a third waveguide channel with a target angle of a second angle in the waveguide array;

rotating the elliptical structure in the second waveguide channel to the first angle and rotating the elliptical structure in the third waveguide channel to the second angle.

8. The incident wave modulation method according to any one of claims 5 to 7, prior to separately rotating the elliptical structures in each of the waveguide channels in the waveguide array according to the modulation requirement, comprising:

rotating all elliptical structures in a fourth waveguide channel under the incident wave, and acquiring a transmission spectrum and a phase characteristic diagram corresponding to the fourth waveguide channel, wherein the fourth waveguide channel is any one of the waveguide channels;

determining a transmission peak angle according to the transmission spectrum and the phase characteristic diagram, wherein the transmission peak angle is a corresponding rotation angle when a Fabry-Perot resonant transmission peak appears in the fourth waveguide channel;

and determining the first angle and the second angle according to the transmission peak angle, wherein the phase difference between the Fabry-Perot resonant transmission peak corresponding to the first angle and the Fabry-Perot resonant transmission peak corresponding to the second angle is pi.

9. An incident wave regulation and control device based on a metamaterial waveguide array is characterized by comprising:

the incident wavelength acquisition module is used for acquiring the regulation and control requirements of incident waves and the incident wavelengths of the incident waves;

the waveguide unit construction module is used for constructing a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide unit and the elliptical structure are both made of materials meeting the Noemann boundary condition;

a waveguide array constructing module, configured to construct a waveguide array according to the waveguide units, the incident wavelength, and a fabry-perot resonance condition, where the waveguide array includes a plurality of waveguide channels, and the waveguide channels include a plurality of waveguide units;

the elliptical structure rotating module is used for respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements;

and the incident wave regulation and control module is used for regulating and controlling the incident wave by using the rotated waveguide array.

10. The incident wave modulation device of claim 9, further comprising:

the transmission spectrum acquisition module is used for rotating all elliptical structures in a fourth waveguide channel under the incident wave and acquiring a transmission spectrum and a phase characteristic diagram corresponding to the fourth waveguide channel, wherein the fourth waveguide channel is any one of the waveguide channels;

a transmission peak angle determining module, configured to determine, according to the transmission spectrum and the phase characteristic diagram, a corresponding rotation angle when a fabry-perot resonant transmission peak occurs in the fourth waveguide;

and the first angle determining module is used for determining a first angle and a second angle according to the transmission peak angle, and the phase difference between the Fabry-Perot resonant transmission peak corresponding to the first angle and the Fabry-Perot resonant transmission peak corresponding to the second angle is pi.

Technical Field

The application belongs to the technical field of metamaterials, and particularly relates to an incident wave regulation and control method and device based on a metamaterial waveguide array.

Background

The metamaterial is an artificial material with sub-wavelength size and has certain property parameters which are not possessed by natural materials. In recent years, electromagnetic waves and acoustic metamaterials are greatly developed, and especially, ultra-large, zero, anisotropic or negative refractive index property parameters are introduced into a structured two-dimensional metamaterial on an equivalent medium level, so that the structured two-dimensional metamaterial is currently applied to the manipulation of sound waves to generate new physical phenomena and the research and development of various novel devices, for example, incident waves can be regulated and controlled through a metamaterial waveguide array.

In order to change the functional effect of the waveguide array, the equivalent refractive index of the metamaterial waveguide unit in the waveguide array can be changed. In the prior art, the equivalent refractive index of the waveguide unit can be changed by changing the structural parameters of the metamaterial unit, for example, changing the length, area or volume of the metamaterial unit, or the waveguide unit with adjustable equivalent refractive index can be manufactured by additionally adding dimensions, using piezoelectric materials or adding external circuits. However, the above method for changing the functional effect of the waveguide array is cumbersome and complicated in steps, and cannot simply and quickly regulate the incident wave.

Disclosure of Invention

The embodiment of the application provides an incident wave regulation and control method based on a metamaterial waveguide array, and incident wave regulation and control can be simply and quickly carried out.

In a first aspect, an embodiment of the present application provides a metamaterial waveguide array, including:

acquiring regulation and control requirements aiming at incident waves and incident wavelengths of the incident waves;

constructing a waveguide unit according to the incident wavelength, wherein the width of the waveguide unit is smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noemann boundary condition;

constructing a waveguide array according to the waveguide units, the incident wavelength and a Fabry-Perot resonance condition, wherein the waveguide array comprises a plurality of waveguide channels, and the waveguide channels comprise a plurality of waveguide units;

respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements;

and regulating and controlling the incident wave by using the rotated waveguide array.

In a second aspect, an embodiment of the present application provides an incident wave modulation device based on a metamaterial waveguide array, including:

the incident wavelength acquisition module is used for acquiring the regulation and control requirements of incident waves and the incident wavelengths of the incident waves;

the waveguide unit construction module is used for constructing a waveguide unit according to the incident wavelength, wherein the length and the width of the waveguide unit are smaller than the incident wavelength, a rotatable elliptical structure is arranged in the waveguide unit, and the waveguide and the elliptical structure are both made of materials meeting the Noemann boundary condition;

a waveguide array constructing module, configured to construct a waveguide array according to the waveguide units, the incident wavelength, and a fabry-perot resonance condition, where the waveguide array includes a plurality of waveguide channels, and the waveguide channels include a plurality of waveguide units;

the elliptical structure rotating module is used for respectively rotating the elliptical structures in the waveguide channels in the waveguide array according to the regulation and control requirements;

and the incident wave regulation and control module is used for regulating and controlling the incident wave by using the rotated waveguide array.

Compared with the prior art, the embodiment of the application has the advantages that: the waveguide array constructed according to the Fabry-Perot resonance condition has high energy transmission rate, and can effectively reduce energy consumption during incident wave transmission; in addition, the equivalent refractive index of the waveguide channel can be rapidly changed by rotating the elliptical structure in the waveguide channel, and the phase amplitude characteristic of the waveguide channel is controlled to obtain a waveguide array meeting the regulation and control requirement, so that the incident wave can be simply and rapidly regulated and controlled.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic flowchart of an incident wave modulation method based on a metamaterial waveguide array according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a waveguide unit provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a waveguide channel according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a waveguide array provided in an embodiment of the present application;

FIG. 5 is a graph of the transmission spectrum and phase characteristics of a waveguide channel varying with the rotation angle θ according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram illustrating the results of super-resolution imaging provided by embodiments of the present application;

FIG. 7 is a graph illustrating the results of focusing effects provided by embodiments of the present application;

FIG. 8 is a schematic structural diagram of a rotated waveguide array according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another rotated waveguide array provided in the embodiments of the present application;

FIG. 10 is a schematic structural diagram of an incident wave modulation device based on a metamaterial waveguide array according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of an incident wave regulation terminal device provided in an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.