Light Field Dynamic Modulation and Spatial Multiplexing Method Based on Reconfigurable Hybrid Metasurface

A space multiplexing and dynamic modulation technology, applied in geometric CAD, design optimization/simulation, computer-aided design, etc., can solve problems such as inability to realize dynamic regulation, and achieve the effect of enriching design freedom and dynamically regulating light field

Active Publication Date: 2020-08-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that dynamic regulation cannot be realized in the existing light field regulation, and to provide a method for dynamic modulation and spatial multiplexing of light field based on reconfigurable hybrid metasurface

Method used

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  • Light Field Dynamic Modulation and Spatial Multiplexing Method Based on Reconfigurable Hybrid Metasurface
  • Light Field Dynamic Modulation and Spatial Multiplexing Method Based on Reconfigurable Hybrid Metasurface
  • Light Field Dynamic Modulation and Spatial Multiplexing Method Based on Reconfigurable Hybrid Metasurface

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Embodiment 1

[0033] Anomalous refraction modulation in different states of phase change materials

[0034] Such as figure 1 As shown, the hybrid reconfigurable metasurface-based light field dynamic modulation and spatial multiplexing method disclosed in this embodiment, the specific implementation method is as follows:

[0035] Step 1: The hybrid reconfigurable metasurface for realizing dynamic modulation and spatial multiplexing of light field is composed of composite concentric ring groups with different geometric sizes and different azimuth angles. The composite ring structure is composed of two parts, which are gold and vanadium dioxide in different proportions. By changing the geometric size of the composite ring structure and the azimuth of the symmetry axis, the hybrid reconfigurable metasurface can control the amplitude and phase of the outgoing beam arbitrarily. The geometric dimensions include the opening angle θ of the composite ring structure, the orientation angle α, and the...

Embodiment 2

[0045] Light Field Mode Dynamic Modulation and Spatial Multiplexing Method

[0046] Step 1: Through the phase formula of vortex light Calculate the phase distribution corresponding to the semiconductor state, where i is the imaginary unit, l and are the topological charge number and azimuth angle, respectively. According to the phase distribution corresponding to the semiconductor state, the eight composite ring structures in Example 1 are encoded onto the same hybrid reconfigurable metasurface. By selecting the output component orthogonal to the incident light field, the vortex light is generated in the semiconductor state of vanadium dioxide and the discrete beams are generated in the same space in the metal state, and spatial multiplexing is realized at the same time.

[0047] Figure 6 It is a simulation diagram for realizing light field modulation and spatial multiplexing. The encoded hybrid reconfigurable metasurface arrays have dual functional properties, generati...

Embodiment 1

[0050] The hybrid reconfigurable metasurface-based optical field dynamic modulation and spatial multiplexing method disclosed in Embodiment 1 and Embodiment 2 utilizes the different refractive index characteristics of the phase change material vanadium dioxide in different states. By changing the outer diameter of the composite ring structure and the proportion of vanadium dioxide in different states of vanadium dioxide, four composites that satisfy the phase coverage of 0-π in the semiconductor state of vanadium dioxide and constant phase and uniform amplitude in the metal state are found. Ring structure; by rotating the symmetry axis of these four structures by 90°, these four structures can obtain an additional π phase to obtain another four structures, so that the phase adjustment of the light field under the two phase transitions can cover the complete 0 to 2π range. Two modes of light fields are obtained by calculation, and the selected composite ring structure is encode...

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Abstract

The invention relates to a method for dynamic modulation and spatial multiplexing of a light field based on a reconfigurable hybrid metasurface, and belongs to the technical field of micro-nano optics and beam shaping applications. The hybrid reconfigurable metasurface used to realize the dynamic modulation and spatial multiplexing of the light field of the present invention is composed of composite ring arrays with different geometric sizes and different symmetry axes. By changing the geometric size of the composite ring and the orientation of the symmetry axis, the hybrid reconfigurable metasurface can adjust the amplitude and phase of the outgoing beam arbitrarily. The complex amplitude distribution of the light field in different modes is obtained by two-dimensional full-wave vector calculation. According to the complex amplitude distribution of the light field obtained in different modes, the geometric size and azimuth angle of the composite ring are coded to generate a corresponding hybrid reconfigurable metasurface structure array. The dynamic control and spatial multiplexing of the incident beam by the same hybrid reconfigurable metasurface can be realized by adjusting the state of the phase change material.

Description

technical field [0001] The invention relates to a method for dynamic modulation and spatial multiplexing of a light field based on a reconfigurable hybrid metasurface, and belongs to the technical field of micro-nano optics and beam shaping applications. Background technique [0002] Metasurfaces are usually composed of subwavelength-sized metal antennas or dielectric nanoresonator arrays, which can arbitrarily modulate the phase, amplitude, and polarization of incident light waves. Compared with traditional optical elements that use the phase accumulation of light during propagation to regulate the light field, metasurfaces provide a way to control the light field through various interactions between light and nanoantennas in a very short distance. A new method for properties. By adjusting the shape, material, and size of the nano-antenna array, the wavefront of the outgoing light can be flexibly adjusted. Reconfigurable metasurfaces increase the design freedom such as li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17
CPCG06F30/17G06F30/23
Inventor 黄玲玲林泽萌赵睿哲魏群烁王涌天李晓炜
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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