A mechanical reconfigurable metasurface based on a magic cube

Abstract

This invention relates to a mechanically reconfigurable metasurface based on a Rubik's Cube, belonging to the field of microwave electromagnetic wave manipulation technology. The mechanically reconfigurable metasurface is composed of multiple Rubik's Cube metacells arranged in a periodically arranged, equally spaced array. Each Rubik's Cube metacell includes a Rubik's Cube carrier and 6*n elements disposed on the carrier. 2 Each primitive is evenly distributed on one of the six faces of the cube carrier. The primitives on the same face of the cube carrier have the same spacing, orientation, and size, so that the primitives on the same face of the cube carrier correspond to a specific reflection phase distribution. This invention uses a mechanically reconfigurable metasurface composed of multiple cube supercells to perform flexible mechanical modulation, thereby realizing multi-order phase gradient arrangement. By combining the positional substitution of primitives and cube supercells, the coplanar reflection phase can be flexibly switched, providing higher control accuracy and a variety of rich degrees of freedom. It does not require complex external feeder design or external high-power excitation, and can be deployed on a large scale and in all directions.

Description

Technical Field

[0001] This invention belongs to the field of microwave frequency electromagnetic wave control technology, specifically relating to a mechanically reconfigurable metasurface based on a Rubik's Cube. Background Technology

[0002] Since the establishment of Maxwell's equations, the arbitrary modulation of the fundamental properties of electromagnetic waves has been a widely pursued goal of researchers. With the rapid development of numerical computing and materials processing technologies, various types of functional components have been developed, but they still face developmental challenges such as integration, miniaturization, and tunability. As artificially manufactured subwavelength structures, metasurfaces can achieve localized modulation of amplitude, phase, and even polarization by introducing field discontinuities in subwavelength ultrathin periodic or quasi-periodic arrays, thereby enabling precise manipulation of the electromagnetic wavefront distribution as needed. However, non-reconfigurable metasurfaces are essentially passive and lack dynamic controllability, only able to achieve one or a few specific electromagnetic properties based on the size or orientation of the unit cells, essentially limiting the flexible application of their electromagnetic functions.

[0003] To flexibly utilize the electromagnetic functions of non-reconfigurable metasurfaces, existing technologies primarily employ methods such as altering the equivalent physical parameters of the cells or reshaping their configuration. Firstly, altering the equivalent physical parameters of the cells is achieved through electrotuning methods involving the addition of active materials or components. Under the stimulation of externally loaded active devices, the electromagnetic response of the entire metasurface is dynamically modulated as the material parameters are tuned. While metasurfaces supported by active materials or components can dynamically customize electromagnetic waves, the complex feeder layout and additional high-power components required for loading active devices inevitably subject the metasurface to adverse factors such as complex structural composition, additional insertion loss, and low-cost efficiency, making large-scale and omnidirectional arraying difficult.

[0004] Secondly, the reshaping of the unit configuration is based on a mechanical modulation method using geometric transformations of translation, rotation, and scaling. This method can facilitate the morphological reconstruction of units or the entire metasurface, and modulate the electromagnetic response by altering the interaction between the metasurface and the incident wave. Compared with electrical tuning methods, mechanical modulation has advantages such as simple structural layout, no need for additional insertion loss, and good tuning continuity. However, existing mechanical modulation can only achieve simultaneous control of all metaunits on the metasurface, resulting in the realization of only one or a few specific electromagnetic properties, thus reducing the flexibility of metasurface electromagnetic property adjustment. Summary of the Invention

[0005] In view of this, the present invention provides a mechanically reconfigurable metasurface based on a Rubik's Cube to overcome the shortcomings of the prior art. The present invention can realize multi-order phase gradient arrangement of the mechanically reconfigurable metasurface, providing higher control accuracy and richer degrees of freedom.

[0006] The technical solution of this invention is: a mechanically reconfigurable metasurface based on a Rubik's Cube, which is composed of multiple Rubik's Cube supercells arranged in a periodic array at equal intervals. Each Rubik's Cube supercell includes a Rubik's Cube carrier and 6*n elements disposed on the Rubik's Cube carrier. 2 Each primitive is evenly distributed on one of the six faces of the Rubik's Cube carrier. Primitives on the same face of the Rubik's Cube carrier have the same spacing, orientation, and size. The Rubik's Cube carrier is mechanically modulated to adjust the reflection phase distribution corresponding to the primitives on the coplanar surface of the mechanically reconfigurable metasurface.

[0007] Preferably, the basic element includes: a four-arc structure, which consists of a central connecting vertical rod and four arc structures symmetrically arranged at both ends of the central connecting vertical rod, with each arc structure being tangent to the central connecting vertical rod.

[0008] Preferably, the rotation angle range of the four-arc structure is 0°~90°, the arc radius of the arc structure is 1.8mm~2.2mm, the central angle range is 105°~207°, and the length range of the middle connecting vertical rod is 1.8mm~2.4mm.

[0009] Preferably, it further includes: a second transparent dielectric substrate and a metal grid, the metal grid being disposed on one side of the second transparent dielectric substrate and parallel to it, the second transparent dielectric substrate being embedded in the Rubik's Cube carrier and fixedly connected to it, and an arc structure and a middle connecting vertical rod being disposed on the other side of the second transparent dielectric substrate.

[0010] Preferably, the metal grid is composed of multiple square holes that are equally spaced along the longitudinal and transverse directions.

[0011] Preferably, there are 8 square holes in both the longitudinal and transverse directions, the length and width of the square holes are 1.15 mm, and the spacing between adjacent square holes is 0.1 mm.

[0012] Preferably, the arc structure, the connecting vertical rod in the middle, and the metal grid are made of copper.

[0013] Preferably, it further includes: a first transparent dielectric substrate, a second transparent dielectric substrate, a third transparent dielectric substrate, and a metal grid, wherein the first transparent dielectric substrate, the second transparent dielectric substrate, the third transparent dielectric substrate, and the metal grid are sequentially fixedly connected and parallel to each other, and the arc structure and the middle connecting vertical rod are fixedly disposed on the side of the first transparent dielectric substrate away from the second transparent dielectric substrate.

[0014] Preferably, both the first transparent dielectric substrate and the third transparent dielectric substrate are made of PET.

[0015] Preferably, the material of the second transparent dielectric substrate is PC.

[0016] Compared with existing technologies, the present invention provides a mechanically reconfigurable metasurface based on a Rubik's Cube. The mechanically reconfigurable metasurface, composed of multiple Rubik's Cube supercells, can be mechanically modulated using a Rubik's Cube carrier. It does not require complex external feeder design or external high-power excitation, and can be deployed on a large scale and in all directions. The three-dimensional permutation of the Rubik's Cube carrier can switch the coplanarity of the primitives in different distribution states, thereby flexibly adjusting the coplanar reflection phase of the mechanically reconfigurable metasurface. This enables multi-order phase gradient arrangement of the mechanically reconfigurable metasurface, thereby providing higher control precision and richer degrees of freedom. As a result, the mechanically reconfigurable metasurface has broadband full polarization response characteristics and avoids polarization mismatch. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the structure and function of the mechanically reconfigurable metasurface of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the Rubik's Cube supercell of the present invention;

[0019] Figure 3 This is a three-dimensional structural schematic diagram of the basic element of this invention;

[0020] Figure 4 These are the front view and bottom view of the basic element of this invention, wherein (a) is the front view of the basic element and (b) is the bottom view of the basic element;

[0021] Figure 5 This is a schematic diagram of the surface current distribution of the four-circular arc structure of the basic element of the present invention, wherein (a) is the surface current distribution of the four-circular arc structure of the basic element under x-polarized incident light, and (b) is the surface current distribution of the four-circular arc structure of the basic element under y-polarized incident light.

[0022] Figure 6 This is a schematic diagram of the co-polarization reflection amplitude and phase response of the basic element of the present invention, wherein (a) is the co-polarization reflection amplitude and phase response of the basic element under orthogonal linear polarization incident, and (b) is the co-polarization reflection amplitude and phase response of the basic element under orthogonal circular polarization incident.

[0023] Figure 7 This is a schematic diagram showing the changes in the co-polarization reflection amplitude and phase response of the basic element of the present invention with 1 and 2, wherein (a) is the change in the co-polarization reflection amplitude and phase of the basic element with 1 under left-hand circular polarization incident light, while 2 remains unchanged; (b) is the change in the co-polarization reflection amplitude and phase of the basic element with 2 under right-hand circular polarization incident light, while 1 remains unchanged.

[0024] Figure 8This is a schematic diagram of the co-polarization reflection amplitude and phase response of the six basic elements of the present invention, wherein (a) is the co-polarization reflection amplitude response of the six basic elements under left-hand circular polarization incident light, (b) is the co-polarization reflection phase response of the six basic elements under left-hand circular polarization incident light, (c) is the co-polarization reflection amplitude response of the six basic elements under right-hand circular polarization incident light, and (d) is the co-polarization reflection phase response of the six basic elements under right-hand circular polarization incident light.

[0025] Figure 9 This is a distribution diagram of the six basic elements of this invention. Detailed Implementation

[0026] This invention provides a mechanically reconfigurable metasurface based on a Rubik's Cube, which is described below in conjunction with... Figures 1 to 9 The present invention is illustrated by the structural diagram shown below.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] like Figure 1 As shown, a mechanically reconfigurable metasurface based on a Rubik's Cube is disclosed. The mechanically reconfigurable metasurface 1 is composed of multiple Rubik's Cube supercells 10 arranged in a periodic array at equal intervals. Each Rubik's Cube supercell 10 includes a Rubik's Cube carrier 101 and 6*n elements disposed on the Rubik's Cube carrier 101. 2 Each primitive 102 is evenly distributed on the six faces of the Rubik's Cube carrier 101. The primitives 102 on the same face of the Rubik's Cube carrier 101 have the same spacing, orientation and size. The Rubik's Cube carrier 101 is mechanically modulated to adjust the reflection phase distribution corresponding to the primitives 102 that are coplanar on the mechanically reconfigurable metasurface 1.

[0029] In this embodiment, the mechanically reconfigurable metasurface 1 is composed of multiple Rubik's Cube supercells 10. By using the Rubik's Cube carrier 101 of the Rubik's Cube supercells 10 for mechanical modulation, the coplanarity of the primitives 102 with different distribution states can be switched, thereby flexibly adjusting the coplanar reflection phase of the mechanically reconfigurable metasurface 1. Moreover, without the need for complex external feeder design and external high-power excitation, it can be arranged on a large scale and in all directions, realizing the multi-order phase gradient arrangement of the mechanically reconfigurable metasurface 1, thereby providing higher control accuracy and richer degrees of freedom, so that the mechanically reconfigurable metasurface 1 has broadband full polarization response characteristics and avoids polarization mismatch.

[0030] like Figure 2 As shown, the Rubik's Cube super unit is a 3rd-order structure, consisting of a Rubik's Cube carrier and 54 primitives (336) attached to it. Through three-dimensional displacement, the primitives (102) in different faces are exchanged, thereby changing the distribution of primitives (102) in the same face in real time, thus forming a spatial phase gradient of up to 6th order, realizing a mechanically reconfigurable metasurface.

[0031] In this embodiment, the primitive distribution within the same face of the Rubik's Cube supercell 10 is the same. The primitive 102 within the same face corresponds to a specific reflection phase distribution, thereby maintaining an efficient reflection amplitude under fully polarized incident light. The mechanically reconfigurable metasurface 1 has broadband fully polarized response characteristics, which can avoid polarization mismatch and resource waste caused by a narrow spectrum, and at the same time improve stability and adaptability.

[0032] like Figure 4 As shown in (a), as a further optimization, the basic element 102 in this embodiment includes: a four-arc structure 1021, which is composed of a central connecting vertical rod 10215 and four arc structures 10211 symmetrically arranged at both ends of the central connecting vertical rod 10215. The arc structures 10211 are tangent to the central connecting vertical rod 10215 respectively.

[0033] In this embodiment, the four-arc structure 1021 consists of a central connecting vertical rod 10215 and an arc structure 10211. The four arc structures 10211 are used to control the reflection phase under x-polarized incident light, and the central connecting vertical rod 10215 is used to control the reflection phase under y-polarized incident light, thereby adjusting the electromagnetic wavefront distribution under fully polarized incident light.

[0034] like Figure 5As shown in (a) to (b), the surface current distribution of the four-circular-arc structure of the primitive under x / y polarization incidence is presented. It can be seen that at 11 GHz, under x-polarization incidence, strong resonance occurs on the surfaces of the first, second, third, and fourth circular arc structures corresponding to the primitive's four-circular-arc structure, resulting in strong currents, while the central connecting rod has no significant effect. Under y-polarization incidence, strong resonance occurs on the surface of the central connecting rod corresponding to the primitive's four-circular-arc structure, resulting in strong currents, while the first, second, third, and fourth circular arc structures have no significant effect. Therefore, by adjusting the structural parameters corresponding to the four-circular-arc structure, independent reflection phase responses under x and y polarization incidence can be achieved.

[0035] In the above embodiment, the middle connecting vertical rod 10215 and the arc structure 10211 are respectively connected to the Rubik's Cube carrier 101, thereby realizing the mechanical modulation of the coplanarity of the primitives 102 with different distribution states by the Rubik's Cube carrier 101 to adjust the electromagnetic wavefront distribution under fully polarized incident radiation.

[0036] As a further optimization, in this embodiment, the rotation angle range of the four-arc structure 1021 is 0°~90°, the arc radius of the arc structure 10211 is 1.8mm~2.2mm, the central angle range is 105°~207°, and the length range of the middle connecting vertical rod 10215 is 1.8mm~2.4mm.

[0037] In this embodiment, by adjusting the structural parameters of the four-circle structure 1021, the distribution state of the basic elements 102 is made different, such as... Figure 9 As shown, the geometric parameters, co-polarized reflection phase and amplitude, and operating spectrum corresponding to the six primitives are given. It can be seen that the six primitives can achieve a co-polarized reflection amplitude of more than 0.82 under arbitrary polarization incident conditions, and the co-polarized reflection phase difference between adjacent primitives is 60°, which satisfies the requirements of a fully polarized multi-gradient mechanically reconfigurable metasurface.

[0038] In the above embodiment, the width w of the arc structure 10211 and the middle connecting vertical rod 10215 is 0.4 mm.

[0039] like Figure 6 As shown in (a), the co-polarized reflection amplitude and phase response of the primitive under orthogonal linear polarization incident conditions are presented. It can be seen that when the rotation angle is 0, the co-polarized reflection amplitude and phase of the primitive satisfy the conditions |rxx|=|ryy|1 and xx-yy=-. Therefore, based on the distribution of the reflection Jones matrix under orthogonal circular polarization incident conditions under linear polarization,

[0040] (1)

[0041] In the formula, (m, n=x, y, L, and R) represent the complex reflection coefficients of m-polarized incident n-polarized light, where r mn (m, n=x, y, L, and R) represent the reflection amplitudes of m-polarized incident light under n-polarized incident light, respectively. mn (m, n=x,y, L, and R) represent the reflection phase of m-polarized under n-polarized incident light, respectively, represent the rotation angle, e represents the base of the natural logarithm, and j represents the imaginary unit. All of these are dimensionless units.

[0042] Therefore, when the rotation angle is 0, the same polarization reflection amplitude and phase of the basic element satisfy the conditions |rxx|=|ryy|1 and xx-yy=-. According to the band formula (1), the basic element has the same circular polarization same polarization reflection amplitude and phase, satisfying the conditions |rLL|=|rRR|1 and LL=RR=xx.

[0043] According to the theory of electromagnetic field decomposition and synthesis, for any incident polarized wave, when the amplitude and phase of the same polarization in the orthogonal circularly polarized basis vector channel are equal and change synchronously, the amplitude and phase of its corresponding same polarization reflection can also be synchronously controlled.

[0044] like Figure 6 As shown in (b), the co-polarization reflection amplitude and phase response of the primitive under orthogonal circular polarization incident light are given. It can be seen that when the rotation angle is 0, the co-polarization reflection amplitude and phase of the primitive satisfy the conditions |rLL|=|rRR|1 and LL=RR.

[0045] like Figure 7 As shown in (a), the amplitude and phase of the co-polarized reflection of the primitive under left-hand circularly polarized incident light are given as 1 changes, while 2 remains unchanged. It can be seen that under left-hand circularly polarized incident light, the amplitude of the co-polarized reflection of the primitive |rLL| remains above 0.75, and the co-polarized reflection phase LL can achieve 180 phase coverage as 1 changes from 100 to 200.

[0046] like Figure 7 As shown in (b), the amplitude and phase of the co-polarized reflection of the primitive under right-hand circularly polarized incident light are given as 2 changes, while 1 remains constant. It can be seen that under right-hand circularly polarized incident light, the amplitude of the co-polarized reflection of the primitive |rRR| remains above 0.75, and the co-polarized reflection phase RR can achieve 180 phase coverage as 2 changes from 100 to 200.

[0047] According to formula (1), since the four-circle arc structure of the primitive rotates by 90, a phase difference of -180 and 180 can be introduced into LL and RR respectively, so that the phase difference between the two is 360. Then the primitive can also introduce an additional phase difference of 180, thereby achieving complete 360 ​​coverage.

[0048] like Figure 8 As shown in (a) to (b), the co-polarization reflection amplitudes and phase responses of the six primitives under left-hand circular polarization incidence are presented. It can be seen that under left-hand circular polarization incidence, the co-polarization reflection amplitudes |rLL| of the six primitives are all above 0.82, and the phase difference between adjacent primitives is 60°, which can achieve 360° phase interval coverage.

[0049] like Figure 8 As shown in (c) to (d), the co-polarization reflection amplitudes and phase responses of the six primitives under right-hand circular polarization incidence are presented. It can be seen that under left-hand circular polarization incidence, the co-polarization reflection amplitudes |rRR| of the six primitives are all above 0.82, and the phase difference between adjacent primitives is 60°, which can achieve 360° phase interval coverage.

[0050] As a further optimization, this embodiment also includes: a second transparent dielectric substrate 1023 and a metal grid 1025. The metal grid 1025 is disposed on one side of the second transparent dielectric substrate 1023 and is parallel to it. The second transparent dielectric substrate 1023 is embedded in the cube carrier 101 and fixedly connected to it. The arc structure 10211 and the middle connecting vertical rod 10215 are disposed on the other side of the second transparent dielectric substrate 1023.

[0051] In this embodiment, the second transparent dielectric substrate 1023 is used in conjunction with the metal grid 1025. By utilizing the filtering characteristics of the metal grid, the incident arbitrary polarized electromagnetic waves can be completely reflected.

[0052] like Figure 4 As shown in (b), in this embodiment, the metal grid 1025 is composed of a plurality of square holes 10251 that are equally spaced along the longitudinal and transverse directions.

[0053] In this embodiment, by forming multiple square holes 10251 at equal intervals along the longitudinal and transverse directions on the metal plate, the uniformity of light transmission can be improved, thereby enhancing the effect of completely reflecting incident arbitrary polarized electromagnetic waves.

[0054] As a further optimization, in this embodiment, there are 8 square holes 10251 in both the longitudinal and transverse directions, the length and width of the square holes 10251 are 1.15mm, and the spacing between adjacent square holes 10251 is 0.1mm.

[0055] In this embodiment, a specific number of square holes 10251 with special spacing are used to achieve complete reflection of incident arbitrary polarized electromagnetic waves by the metal grid 1025.

[0056] In this embodiment, the length and width g of the square hole 10251 are 1.15 mm, and the spacing between adjacent square holes 10251 is 0.1 mm.

[0057] As a further optimization, in this embodiment, the arc structure 10211, the intermediate connecting vertical rod 10215, and the metal grid 1025 are made of copper.

[0058] In this embodiment, the use of a copper arc structure 10211, a middle connecting vertical rod 10215, and a metal grid 1025 can improve the effect of controlling the reflection phase under x and y polarized incident light and the effect of reflecting incident arbitrary polarized electromagnetic waves.

[0059] In the above embodiment, the electrical conductivity of copper is 5.810. 7 The thicknesses of the arc structure 10211, the intermediate connecting vertical rod 10215, and the metal grid 1025 are 0.035 mm, respectively.

[0060] like Figure 3 As shown, as a further optimization, this embodiment also includes: a first transparent dielectric substrate 1022, a second transparent dielectric substrate 1023, a third transparent dielectric substrate 1024, and a metal grid 1025. The first transparent dielectric substrate 1022, the second transparent dielectric substrate 1023, the third transparent dielectric substrate 1024, and the metal grid 1025 are sequentially fixedly connected and parallel to each other. The arc structure 10211 and the intermediate connecting vertical rod 10215 are fixedly disposed on the side of the first transparent dielectric substrate 1022 away from the second transparent dielectric substrate 1023.

[0061] In this embodiment, the first transparent dielectric substrate 1022 and the third transparent dielectric substrate 1024 are used in conjunction with the second transparent dielectric substrate 1023 and the metal grid 1025 to achieve optical transparency, allow real-time feedback of aperture array arrangement, have good interactivity and strong visibility, and reduce operational errors and labor costs.

[0062] In this embodiment, the four-arc structure, transparent dielectric substrate, and metal grid allow for tunable spectral response, enabling real-time sequence mapping and dynamic rearrangement by combining the sub-blocks of the Rubik's Cube.

[0063] As a further optimization, in this embodiment, both the first transparent dielectric substrate 1022 and the third transparent dielectric substrate 1024 are made of PET.

[0064] In this embodiment, the relative permittivity of PET is 3.0, the loss tangent is 0.06, and the thickness of the first transparent dielectric substrate 1022 is... h 1 = 0.05 mm, the thickness of the third transparent dielectric substrate 1024 h 3 = 0.125 mm.

[0065] As a further optimization, the material of the second transparent dielectric substrate 1023 in this embodiment is PC.

[0066] In this embodiment, the relative permittivity of the PC is 2.9, the loss tangent is 0.007, and the thickness of the second transparent dielectric substrate 1023 is... h 2 = 3 mm.

[0067] This invention achieves a desired total of 6th-order co-polarized reflection phase gradient distribution by selectively switching different in-plane primitives to designated positions and orientations, with the amplitude remaining essentially unchanged, thereby modulating the electromagnetic wavefront under fully polarized incident radiation. Furthermore, the four-circle structure, transparent dielectric substrate, and metal grid allow for tunable spectral response, enabling real-time sequence mapping and dynamic rearrangement by combining with Rubik's Cube sub-blocks.

[0068] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A mechanically reconfigurable metasurface based on a Rubik's Cube, characterized in that, The mechanically reconfigurable metasurface (1) is composed of multiple Rubik's Cube supercells (10) arranged in a periodic array at equal intervals; The Rubik's Cube superunit (10) includes: a Rubik's Cube carrier (101) and a 6*n array disposed on the Rubik's Cube carrier (101). 2 There are 102 basic units (102), where n is the order of the Rubik's Cube superunit (10). The basic units (102) are evenly distributed on the 6 faces of the Rubik's Cube carrier (101). The basic units (102) on the same face of the Rubik's Cube carrier (101) have the same spacing, direction and size. The Rubik's Cube carrier (101) is mechanically modulated to adjust the reflection phase distribution corresponding to the basic units (102) coplanar with the mechanically reconfigurable metasurface (1). The basic element (102) includes: a four-arc structure (1021), which is composed of a central connecting vertical rod (10215) and four arc structures (10211) symmetrically arranged at both ends of the central connecting vertical rod (10215). The arc structures (10211) are tangent to the central connecting vertical rod (10215) respectively. The basic unit (102) also includes: a first transparent dielectric substrate (1022), a second transparent dielectric substrate (1023), a third transparent dielectric substrate (1024) and a metal grid (1025). The first transparent dielectric substrate (1022), the second transparent dielectric substrate (1023), the third transparent dielectric substrate (1024) and the metal grid (1025) are fixedly connected in sequence and parallel to each other. The arc structure (10211) and the middle connecting vertical rod (10215) are fixed on the side of the first transparent dielectric substrate (1022) away from the second transparent dielectric substrate (1023). The primitive distribution within the same face of the Rubik's Cube supercell (10) is the same, and the primitive (102) within the same face corresponds to a specific reflection phase distribution.

2. The mechanically reconfigurable metasurface based on a Rubik's Cube according to claim 1, characterized in that, The rotation angle range of the four-circular arc structure (1021) is 0°~90°, the arc radius of the circular arc structure (10211) is 1.8mm~2.2mm, the central angle range is 105°~207°, and the length range of the intermediate connecting vertical rod (10215) is 1.8mm~2.4mm.

3. The mechanically reconfigurable metasurface based on a Rubik's Cube according to claim 1, characterized in that, The metal grid (1025) is composed of multiple square holes (10251) that are equally spaced along the longitudinal and transverse directions.

4. The mechanically reconfigurable metasurface based on a Rubik's Cube according to claim 3, characterized in that, The square holes (10251) are 8 in the longitudinal direction and 8 in the transverse direction. The length and width of the square holes (10251) are 1.15 mm and the spacing between adjacent square holes (10251) is 0.1 mm.

5. The mechanically reconfigurable metasurface based on a Rubik's Cube according to claim 2, characterized in that, The arc structure (10211), the intermediate connecting vertical rod (10215), and the metal grid (1025) are made of copper.

6. The mechanically reconfigurable metasurface based on a Rubik's Cube according to claim 1, characterized in that, The first transparent dielectric substrate (1022) and the third transparent dielectric substrate (1024) are both made of PET.

7. The mechanically reconfigurable metasurface based on a Rubik's Cube according to claim 1, characterized in that, The material of the second transparent dielectric substrate (1023) is PC.

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