Multi-polarization non-reciprocal metamaterial coherent absorber based on temperature control and electric control cooperation

Abstract

The application provides a multi-polarization non-reciprocal metamaterial coherent wave absorber based on temperature control and electric control cooperation, each wave absorber unit comprising two metal layers etched with quasi-# Chinese character-shaped slots arranged in an up-down mode and a metal layer with a C-shaped slot located in the middle, and a graphene grating located between adjacent metal layers, and part positions in the two quasi-# Chinese character-shaped slots being filled with a phase change material to form a composite structure with the metal layer. The application realizes conversion of the metal-insulating state of the phase change material by controlling the temperature of the phase change material, and adjusts the Fermi level of the graphene grating by controlling the bias voltage of the graphene grating, thereby realizing x-polarization and x-polarization same-polarization reciprocal coherent wave absorption, x-polarization and y-polarization cross-polarization non-reciprocal coherent wave absorption in a frequency band, and realizing y-polarization and y-polarization same-polarization reciprocal coherent wave absorption, y-polarization and x-polarization cross-polarization non-reciprocal coherent wave absorption in another frequency band, so that the application range is effectively widened.

Description

Technical Field

[0001] This invention belongs to the field of metamaterial electromagnetic wave control technology, and relates to a metamaterial coherent absorber, specifically a multi-polarization non-reciprocal metamaterial coherent absorber based on temperature control and electrical control synergy, which can be used in multi-polarization absorbing devices and other fields. Technical Background

[0002] An absorber is a material that absorbs electromagnetic waves without reflecting them. A coherent absorber is a device that achieves coherent destructive absorption of electromagnetic waves by controlling the interaction between the wave and the signal wave. Metamaterial coherent absorbers combine metamaterials and coherent absorption mechanisms in a subwavelength structure design. When an electromagnetic wave is directly incident on the front of the metamaterial absorber, a portion is reflected back to the incident direction. Simultaneously, a portion of the electromagnetic wave incident from the back is transmitted back to the front. These two portions of electromagnetic waves simultaneously satisfy the conditions of having the same propagation direction, frequency, and amplitude, and a phase difference of π, thus achieving coherent and perfect absorption.

[0003] According to the polarization mode, coherent absorption can be divided into co-polarized coherent absorption and cross-polarized coherent absorption. Co-polarized coherent absorption is reciprocal coherent absorption, that is, the electromagnetic response of the electromagnetic wave is the same in the forward and reverse propagation. Cross-polarized coherent absorption is non-reciprocal coherent absorption, that is, the electromagnetic response of the electromagnetic wave is different in the forward and reverse propagation. Existing metamaterial coherent absorbers can only achieve two types of co-polarized coherent absorption characteristics. For example, patent application CN114267959A, entitled "A Polarization-Controlled Coherent Perfect Absorber Based on Multilayer Metamaterials," discloses a polarization-controlled coherent perfect absorber based on multilayer metamaterials. It consists of two layers of asymmetric metal open-loop rings and a dielectric layer between the two asymmetric open-loop rings. The two layers of asymmetric metal open-loop rings are composed of an inverted V-shaped metal wire and a U-shaped metal wire. The two layers of asymmetric metal open-loop rings have the same structure and are symmetrically arranged along the dielectric layer. This invention achieves a maximum absorption rate of 99.1% at a frequency of 158 THz when the signal light and control light are both X-polarized waves, and a maximum absorption rate of 98.5% at a frequency of 405 THz when the signal light and control light are both Y-polarized waves, by adjusting the polarization direction and phase of the control light and the signal light. However, its drawback is that it can only achieve coherent absorption characteristics of two co-polarized waves, and cannot achieve non-reciprocal coherent perfect absorption of cross-polarized waves, resulting in its limited functionality and poor practicality. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a multi-polarized non-reciprocal metamaterial coherent absorber based on the synergy of temperature control and electrical control, which can broaden its application range while ensuring a high absorption rate.

[0005] To achieve the above objectives, the technical solution adopted by the present invention includes multiple absorber units periodically arranged along the X and Y directions in the three-dimensional coordinate system OXY plane; characterized in that the absorber unit includes a first metal layer 1, a first graphene grating 2, a second metal layer 3 with C-shaped slots, a second graphene grating 4, and a third metal layer 5 arranged sequentially from top to bottom; the first metal layer 1 and the third metal layer 5 are respectively etched with a first quasi-# shaped slot 6 and a second quasi-# shaped slot formed by splicing three F-shaped slots. Gap 7, wherein the first F-shaped gap and the second F-shaped gap are mirror-symmetrical about the angle bisectors of the X-axis and Y-axis, respectively; the first F-shaped gap and the third F-shaped gap in the first quasi-#-shaped gap 6 and the second quasi-#-shaped gap 7 are mirror-symmetrical about the X-axis and Y-axis, respectively; a portion of the first quasi-#-shaped gap 6 and the second quasi-#-shaped gap 7 are filled with phase change material, forming composite structures with the first metal layer 1 and the third metal layer 5, respectively, and the two composite structures have the same structure; the opening direction of the C-shaped gap 31 forms an angle β with the Y-axis;

[0006] By controlling the temperature of the phase change material, the metal-insulating state transition is achieved. Simultaneously, by controlling the bias voltage of the graphene grating, the Fermi level is adjusted. In one frequency band, reciprocal coherent absorption of x-polarized and x-polarized co-polarized absorption, and non-reciprocal coherent absorption of x-polarized and y-polarized cross-polarized absorption are achieved. In another frequency band, reciprocal coherent absorption of y-polarized and y-polarized co-polarized absorption, and non-reciprocal coherent absorption of y-polarized and x-polarized cross-polarized absorption are achieved.

[0007] The aforementioned multipolar non-reciprocal metamaterial coherent absorber based on temperature control and electronic control synergy has the following components: the first metal layer 1 is printed on the upper surface of the square first dielectric substrate 8; the first graphene grating 2 is printed on the upper surface of the square second dielectric substrate 9; the second metal layer 3 with C-shaped slits and the second graphene grating 4 are printed on the upper and lower surfaces of the square third dielectric substrate 10, respectively; and the third metal layer 5 is printed on the lower surface of the square fourth dielectric substrate 11.

[0008] The aforementioned multi-polarized non-reciprocal metamaterial coherent absorber based on temperature control and electrical control has the same structure for the first F-type slit, the second F-type slit, and the third F-type slit.

[0009] The aforementioned multipolar non-reciprocal metamaterial coherent absorber based on temperature control and electrical control synergy uses VO2, WS2, or BP as the phase change material.

[0010] The above-mentioned multi-polarized non-reciprocal metamaterial coherent absorber based on temperature control and electronic control synergy, the second graphene grating 4, has the same structure as the first graphene grating 2, and the angle α between the strips of the two graphene gratings and the X-axis is 45°±10°.

[0011] The aforementioned multi-polarized non-reciprocal metamaterial coherent absorber based on temperature control and electrical control synergy is characterized in that: the width of the graphene grating strips and the grating gaps of the first graphene grating 2 and the second graphene grating 4 are equal.

[0012] The aforementioned multi-polarized non-reciprocal metamaterial coherent absorber based on temperature control and electronic control synergy, comprising the first graphene grating 2 and the second graphene grating 4, has an applied bias voltage v. g With Fermi level μ c The relationship is:

[0013]

[0014] in, Let v represent the reduced Planck constant. f ε represents the Fermi velocity, ε₀ represents the dielectric constant of vacuum, ε r D1 represents the dielectric constant of the dielectric substrate, e represents the electron charge, D1 represents the thickness of the first or fourth dielectric substrate, and D2 represents the thickness of the second or third dielectric substrate.

[0015] The aforementioned multipolar non-reciprocal metamaterial coherent absorber based on temperature control and electrical control synergy, wherein the C-shaped slit 31 has an opening direction that is β = 45° ± 10° with the Y-axis.

[0016] The aforementioned multipolar non-reciprocal metamaterial coherent absorber based on temperature control and electrical control synergy uses Au, Ag, or Ti for the first metal layer 1, the second metal layer 3, and the third metal layer 5.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The absorber unit of this invention includes two graphene gratings, and phase change materials are filled in part of the two quasi-#-shaped slits etched in the first and third metal layers, forming composite structures with the first and third metal layers respectively. The metal-insulating state conversion of the phase change materials is achieved by controlling the temperature of the phase change materials, and the Fermi level of the graphene gratings is adjusted by controlling the bias voltage of the graphene gratings. This achieves two co-polarized reciprocal coherent absorptions and two cross-polarized non-reciprocal coherent absorptions, avoiding the single-function defect of the prior art which can only achieve two co-polarized reciprocal coherent absorptions, and effectively broadening the application range. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the absorber unit of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the first metal layer of the present invention;

[0021] Figure 3This is a schematic diagram of the structure of the third metal layer of the present invention;

[0022] Figure 4 This is a schematic diagram of the graphene grating structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the second metal layer of the present invention;

[0024] Figure 6 The graphene Fermi level μ of this invention c =1eV, VO2 is in the metallic state, the absorption rate results when the x-polarization control wave and the x-polarization signal wave are incident on the metamaterial absorber and coherently absorb the waves;

[0025] Figure 7 The graphene Fermi level μ of this invention c =0.7eV, VO2 is in an insulating state, the absorption rate results when the x-polarized control wave and the y-polarized signal wave are incident on the metamaterial absorber and coherently absorb the waves;

[0026] Figure 8 The graphene Fermi level μ of this invention c =0.2eV, VO2 is in an insulating state, the absorption rate results when the y-polarized control wave and the x-polarized signal wave are incident on the metamaterial absorber and coherently absorb the waves;

[0027] Figure 9 The graphene Fermi level μ of this invention c =0.1eV, VO2 is in the metallic state, the absorption rate results when the y-polarized control wave and the y-polarized signal wave are incident on the metamaterial absorber and coherently absorb. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0029] Reference Figure 1This invention comprises multiple absorber units periodically arranged along the X and Y directions in a three-dimensional coordinate system OXY plane. Each absorber unit includes, from top to bottom, a first metal layer 1, a first graphene grating 2, a second metal layer 3 with C-shaped slits, a second graphene grating 4, and a third metal layer 5. The first metal layer 1 is printed on the upper surface of a square first dielectric substrate 8, the first graphene grating 2 is printed on the upper surface of a square second dielectric substrate 9, the second metal layer 3 with C-shaped slits and the second graphene grating 4 are printed on the upper and lower surfaces of a square third dielectric substrate 10, respectively, and the third metal layer 5 is printed on the lower surface of a square fourth dielectric substrate 11. The dielectric substrates are stacked sequentially, wherein the thickness D1 of the square first dielectric substrate 8 and the square fourth dielectric substrate 11 is 6.5 μm, and the thickness D2 of the square second dielectric substrate 9 and the square third dielectric substrate 10 is 5 μm. The dielectric substrate material is polyimide with a dielectric constant of 2 + 0.025i, where i is an imaginary unit. The metal used is Au, which has high conductivity and high mechanical strength in the terahertz band.

[0030] Reference Figure 2 , Figure 3 The first metal layer 1 and the third metal layer 5 are respectively etched with a first quasi-# shaped slot 6 and a second quasi-# shaped slot 7, which are composed of three F-shaped slots. The width of the slot is t = 2 μm. The first F-shaped slot and the second F-shaped slot are mirror-symmetric about the angle bisectors of the X-axis and Y-axis, respectively. The first F-shaped slot 6 and the third F-shaped slot 7 are mirror-symmetric about the X-axis and Y-axis, respectively. At this time, the opening direction of the first quasi-# shaped slot 6 faces the negative direction of the X-axis, and the opening direction of the second quasi-# shaped slot 7 faces the negative direction of the Y-axis. The opening directions of the first quasi-# shaped slot 6 and the second quasi-# shaped slot 7 are perpendicular to each other. When an incident electromagnetic wave passes through the slot, the electric field direction rotates by 90°. The first F-shaped slot, the second F-shaped slot, and the third F-shaped slot have the same structure, and the same slot structure has the same response to the incident electromagnetic wave. The metal layer is square with a side length of p = 40 μm, which is equal to the period of the metamaterial absorber unit. The distance between the slits in the opening direction of the first quasi-# shaped slit 6 or the second quasi-# shaped slit 7 is k = 4 μm.

[0031] Partial portions of the first quasi-# shaped slit 6 and the second quasi-# shaped slit 7 are filled with phase change material, forming composite structures with the first metal layer 1 and the third metal layer 5, respectively, and the two composite structures are identical. The third F-shaped slit and its top extension in the first quasi-# shaped slit 6 are filled with phase change material, wherein the length L1 = 35 μm formed by splicing the second F-shaped slit and the first F-shaped slit. The third F-shaped slit and the length and extension of the second F-shaped slit in the second quasi-# shaped slit 7 are filled with phase change material, wherein the width d2 = 1.25 μm of the phase change material in the second F-shaped slit, and the width d1 = 0.5 μm of the phase change material in the extension of the second F-shaped slit. The phase change material is VO2, which is in an insulating state when its temperature is below the phase change temperature Tc ≈ 340 K, and in a metallic state when its temperature is above the phase change temperature. In the insulating state, the conductivity is less than 200 S / m; in the metallic state, the conductivity is greater than 10. 5 The conductivity of VO2 is above S / m. Therefore, VO2 can operate in both metallic and insulating states, and its conductivity can be controlled by adjusting the temperature.

[0032] Reference Figure 4 The first graphene grating 2 and the second graphene grating 4 have identical structures, and the angle α between the strips of these two graphene gratings and the X-axis is 45°. The rotating graphene grating has a deflecting effect on the polarization of the incident electromagnetic wave. The width of the graphene grating strips and the grating gap are equal, maximizing the interaction between the incident wave and the grating structure, thus generating stronger polarization control. The width of the graphene grating strips and the grating gap is t = 2µm. The graphene grating is controlled by an external bias voltage v. g and ground control Fermi level μ c The electrical conductivity of a graphene grating surface includes both in-band conductivity and interband conductivity. Generally, the interband conductivity of a graphene grating is negligible under certain conditions, depending on the applied bias voltage v. g With Fermi level μ c The relationship is:

[0033]

[0034] in, Let v represent the reduced Planck constant. f =1.1*10 6 m / s represents the Fermi velocity, ε0 ​​represents the dielectric constant of vacuum, ε r D1 represents the dielectric constant of the dielectric substrate, e represents the electron charge, D1 represents the thickness of the first or fourth dielectric substrate, and D2 represents the thickness of the second or third dielectric substrate.

[0035] At a temperature of 300 K and a relaxation time τ of 0.1 ps, the conductivity σ of a graphene grating is related to the Fermi level μ. c The relationship is:

[0036]

[0037] Here, ω represents the angular frequency of the electromagnetic wave. The conductivity of the graphene grating can be adjusted by changing the Fermi level, thereby affecting the electromagnetic response of electromagnetic waves incident on surfaces with different conductivity, and thus adjusting the absorption efficiency of coherent absorption.

[0038] Reference Figure 5 The second metal layer 3 has a C-shaped slit, and the opening direction of the C-shaped slit 31 makes an angle of β = 45° with the Y-axis, which can perform a 45° polarization conversion on the transmitted electromagnetic wave. The side length of the C-shaped slit is L2 = 27 μm.

[0039] When electromagnetic waves with different linear polarizations are incident on a metamaterial absorber from two directions, the reflected wave in the positive direction and the transmitted wave in the negative direction, although satisfying the coherent destructive conditions of the same propagation direction, frequency, amplitude, and phase difference π, cannot coherently destructively interact due to their different polarization directions, thus making it difficult to achieve perfect absorption. Therefore, to achieve perfect coherent absorption with dual polarization, the two polarizations of the transmitted and reflected waves must be simultaneously destructed.

[0040] For coherent perfect absorption with the same polarization, its absorption efficiency can be expressed as:

[0041] A I =1-[|r xx | 2 +|t xx | 2 +2|r xx |·|t xx |·cos(φ1)+|r xy | 2 +|t xy | 2 +2|r xy |·|t xy |·cos(φ2)]

[0042] Where r xx Indicates x-polarized incident and x-polarized reflected, t xx Indicates x-polarized incident x-polarized transmission, r xy Indicates x-polarized incident and y-polarized reflected, t xy This represents x-polarized incident light and y-polarized transmission light, where φ1 represents r. xx and t xx The phase difference between them, φ2 represents r xy and t xy The phase difference between them.

[0043] For cross-polarized coherent perfect absorption, its absorption efficiency can be expressed as:

[0044] A C =1-[|r xx | 2 +|t yx | 2 +2|r xx |·|t yx |·cos(φ3)+|r xy | 2 +|t yy | 2 +2|r xy |·|t yy |·cos(φ4)]

[0045] Among them, t yx Indicates y-polarized incident x-polarized transmission, t yy φ3 represents y-polarized incident y-polarized transmission, and φ3 represents r xx and t yx The phase difference between them, φ4 represents r xy and t yy The phase difference between them.

[0046] By controlling the temperature of the phase change material, the metal-insulating state transition is achieved. Simultaneously, by controlling the bias voltage of the graphene grating, the Fermi level is adjusted. In one frequency band, reciprocal coherent absorption of x-polarized and x-polarized co-polarized absorption, and non-reciprocal coherent absorption of x-polarized and y-polarized cross-polarized absorption are achieved. In another frequency band, reciprocal coherent absorption of y-polarized and y-polarized co-polarized absorption, and non-reciprocal coherent absorption of y-polarized and x-polarized cross-polarized absorption are achieved.

[0047] The technical effects of the present invention will be explained below with reference to simulation experiments.

[0048] 1. Simulation conditions and content:

[0049] The commercial simulation software CST Microwave Studio was used to perform data simulation for this invention.

[0050] Simulation 1: The graphene Fermi level μ of this invention c The absorption rate of the metamaterial absorber when the x-polarization control wave and the x-polarization signal wave are incident on the metamaterial absorber at a voltage of 1 eV and when VO2 is in the metallic state is simulated. The results are as follows: Figure 6 As shown.

[0051] Simulation 2: The graphene Fermi level μ of this invention c The absorption rate of the metamaterial absorber when the x-polarized control wave and the y-polarized signal wave are incident on the absorber at a voltage of 0.7 eV and VO2 in an insulating state is simulated. The results are as follows: Figure 7 As shown.

[0052] Simulation 3: The graphene Fermi level μ of this invention c The absorption rate of the metamaterial absorber when the y-polarized control wave and x-polarized signal wave are incident on the absorber at a voltage of 0.2 eV and VO2 in an insulating state is simulated. The results are as follows: Figure 8 As shown.

[0053] Simulation 4: The graphene Fermi level μ of this invention c The absorption rate of the metamaterial absorber when the y-polarization control wave and the y-polarization signal wave are incident on the metamaterial absorber at a voltage of 0.1 eV and when VO2 is in the metallic state is simulated. The results are as follows: Figure 9 As shown.

[0054] 2. Simulation results analysis;

[0055] Reference Figure 6 When the control wave is x-polarized, and the signal wave is x-polarized, the Fermi level μ of the graphene is adjusted by the bias voltage. c =1eV, when the temperature control VO2 is in a metallic state, at a frequency of 3THz, when the x-polarization control wave is incident along the negative Z-axis onto the first metal layer 1 on the upper surface of the metamaterial absorber, it is transmitted as an x-polarized wave. The x-polarized wave is transmitted through the first graphene grating 2, the second metal layer 3 with C-shaped slits, the second graphene grating 4, and the third metal layer 5, and then transmits as an x-polarized wave. It achieves reciprocal coherent absorption of the x-polarization control wave and the x-polarized signal wave incident along the positive Z-axis, realizing coherent perfect absorption with a same polarization absorption efficiency of 97.9%.

[0056] Reference Figure 7 When the control wave is x-polarized and the signal wave is y-polarized, the Fermi level μ of the graphene is adjusted by the bias voltage. c =0.7eV, when the temperature control VO2 is in an insulating state, at a frequency of 3THz, when the x-polarized control wave is incident along the negative Z-axis onto the first metal layer 1 on the upper surface of the metamaterial absorber, it is transmitted as an x-polarized wave. The x-polarized wave is transmitted as a y-polarized wave after passing through the first graphene grating 2, the second metal layer 3 with C-shaped slits, the second graphene grating 4, and the third metal layer 5. It then achieves non-reciprocal coherent absorption of the x-polarized control wave and the y-polarized signal wave incident along the positive Z-axis, thus achieving coherent perfect absorption with a cross-polarization absorption efficiency of 95.3%.

[0057] Reference Figure 8 When the control wave is y-polarized and the signal wave is x-polarized, the Fermi level μ of the graphene is adjusted by the bias voltage. cWhen the temperature control VO2 is in an insulating state at 0.2 eV, at a frequency of 3.65 THz, when the x-polarized signal wave is incident along the negative Z-axis onto the first metal layer 1 on the upper surface of the metamaterial absorber, it is transmitted as an x-polarized wave. The x-polarized wave is transmitted as a y-polarized wave after passing through the first graphene grating 2, the second metal layer 3 with C-shaped slits, the second graphene grating 4, and the third metal layer 5. It then achieves non-reciprocal coherent absorption of the y-polarized control wave and the x-polarized signal wave, realizing a coherent perfect absorption with a cross-polarization absorption efficiency of 99.7%.

[0058] Reference Figure 9 When the control wave is y-polarized, and the signal wave is y-polarized, the Fermi level μ of the graphene is adjusted by the bias voltage. c When the temperature control VO2 is in a metallic state at 0.1 eV, at a frequency of 3.65 THz, when the y-polarized signal wave is incident along the negative Z-axis onto the first metal layer 1 on the upper surface of the metamaterial absorber, it is transmitted as a y-polarized wave. The y-polarized wave is transmitted through the first graphene grating 2, the second metal layer 3 with C-shaped slits, the second graphene grating 4, and the third metal layer 5, and then transmits as a y-polarized wave. It achieves reciprocal coherent absorption of the y-polarized control wave and the y-polarized signal wave incident along the positive Z-axis, thus achieving coherent perfect absorption with a same polarization absorption efficiency of 99%.

[0059] By coordinating temperature and voltage control, coherent perfect absorption was achieved when the control wave was x-polarized and the signal wave was co-polarized or cross-polarized at a frequency of 3THz. At the same time, coherent perfect absorption was achieved when the control wave was y-polarized and the signal wave was co-polarized or cross-polarized at a frequency of 3.65THz. The absorption rate of two different polarization signal waves can be manipulated by a control wave of one polarization, realizing non-reciprocal coherent perfect absorption of co-polarized and cross-polarized waves, thus solving the current deficiency of single function in coherent perfect absorption.

[0060] In summary, this invention achieves perfect absorption of two types of co-polarized reciprocal coherent waves and two types of cross-polarized non-reciprocal coherent waves, greatly improving the controllability of the absorber and laying the foundation for future multi-polarized absorbing devices. Various modifications and changes in form and details may be made based on the content and principles of this invention, but these modifications and changes based on the ideas of this invention are still within the scope of protection of the claims of this invention.

Claims

1. A multi-polarization non-reciprocal metamaterial coherent wave absorber based on temperature and electric control cooperation, comprising a plurality of wave absorber units periodically arranged along X and Y directions in the OXY plane of a three-dimensional coordinate system; characterized in that, The wave-absorbing body unit comprises, from top to bottom, a first metal layer (1), a first graphene grating (2), a second metal layer (3) with a C-shaped slit, a second graphene grating (4), and a third metal layer (5); the first metal layer (1) and the third metal layer (5) are respectively etched with a first quasi-# shaped slit (6) formed by splicing three F-shaped slits and a second quasi-# shaped slit (7), wherein the first F-shaped slit and the second F-shaped slit are mirror-symmetrical about the angle bisector of the X axis and the Y axis, and the first F-shaped slit and the third F-shaped slit in the first quasi-# shaped slit (6) and the second quasi-# shaped slit (7) are respectively mirror-symmetrical about the X axis and the Y axis; part of the positions in the first quasi-# shaped slit (6) and the second quasi-# shaped slit (7) are filled with a phase change material to form a composite structure with the first metal layer (1) and the third metal layer (5), respectively, and the two composite structures are the same in structure; the included angle between the opening direction of the C-shaped slit (31) and the Y axis is β. By controlling the temperature of the phase change material to realize the conversion of its metal-insulating state, and by controlling the bias voltage of the graphene grating to realize the adjustment of its Fermi level, x-polarized and x-polarized co-polarized reciprocal coherent wave absorption, x-polarized and y-polarized cross-polarized non-reciprocal coherent wave absorption are realized in one frequency band, and y-polarized and y-polarized co-polarized reciprocal coherent wave absorption, y-polarized and x-polarized cross-polarized non-reciprocal coherent wave absorption are realized in another frequency band.

2. The multi-polarized non-reciprocal metamaterial coherent wave absorber based on the cooperation of temperature control and electric control according to claim 1, characterized in that: The first metal layer (1) is printed on the upper surface of a square first dielectric plate (8); the first graphene grating (2) is printed on the upper surface of a square second dielectric plate (9); the second metal layer (3) with a C-shaped slit and the second graphene grating (4) are respectively printed on the upper surface and the lower surface of a square third dielectric plate (10); and the third metal layer (5) is printed on the lower surface of a square fourth dielectric plate (11).

3. The multi-polarized non-reciprocal metamaterial coherent wave absorber based on the cooperation of temperature control and electric control according to claim 1, characterized in that: The first F-shaped slit, the second F-shaped slit, and the third F-shaped slit are the same in structure.

4. The multi-polarized non-reciprocal metamaterial coherent wave absorber based on the cooperation of temperature control and electric control according to claim 1, characterized in that: The phase change material is VO2, WS2, or BP.

5. The multi-polarized non-reciprocal metamaterial coherent wave absorber based on the cooperation of temperature control and electric control according to claim 1, characterized in that: The second graphene grating (4) is the same in structure as the first graphene grating (2), and the included angle α between the strip of the two graphene gratings and the X axis is 45°±10°.

6. The multi-polarized non-reciprocal metamaterial coherent wave absorber based on the cooperation of temperature control and electric control according to claim 5, characterized in that: The graphene grating strip of the first graphene grating (2) and the second graphene grating (4) is equal in width to the grating slit.

7. The multi-polarized non-reciprocal metamaterial coherent wave absorber based on the cooperation of temperature control and electric control according to claim 5, characterized in that: The first graphene grating (2) and the second graphene grating (4) have an external bias voltage v g in relation to the Fermi level μ c ​ wherein represents the reduced Planck constant, v f represents the Fermi velocity, ε0represents the permittivity of vacuum, ε r represents the permittivity of the medium plate, e represents the electron charge, D1represents the thickness of the first medium plate or the fourth medium plate, and D2represents the thickness of the second medium plate or the third medium plate. 8.The multi-polarized non-reciprocal metamaterial coherent wave absorber based on the cooperation of temperature control and electric control according to claim 1, wherein: The included angle β between the opening direction of the C-shaped slit (31) and the Y axis is 45°±10°. 9.The multi-polarized non-reciprocal metamaterial coherent wave absorber based on the cooperation of temperature control and electric control according to claim 1, characterized in that: The first metal layer (1), the second metal layer (3), and the third metal layer (5) are made of Au, Ag, or Ti.

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