Construction method of electromagnetic metasurface under the condition of unit close coupling based on deep learning

Abstract

The invention discloses a deep learning-based method for constructing an electromagnetic metasurface under unit near-coupling conditions. The method is as follows: in the microwave or optical band, select the unit period so that the unit transmittance or reflectance is greater than the threshold, and by changing the unit properties, the phase change of the wavefront covers a range of 2π; the target unit and the surrounding units are regarded as a subunit Array, 3-bit quantization of the unit, and establish the data set of the transmission field or reflection field of the target unit; design the neural network model, the input is the unit of different attributes, the output is the corresponding transmission or reflection field, and the training generates the neural network that meets the accuracy requirements Network model; build an electromagnetic metasurface, use the neural network to establish the relationship between the unit attribute and the transmission field or reflection field, and calculate the electric field value at the target to be optimized; use the optimization algorithm to optimize the electromagnetic metasurface and adjust the electromagnetic metasurface The efficiency of electromagnetic wave regulation. The invention significantly improves the electromagnetic wave control efficiency of the electromagnetic metasurface.

Description

technical field [0001] The invention relates to a numerical calculation technology of electromagnetic characteristics of a moving target, in particular to an electromagnetic metasurface construction method based on deep learning under unit near-coupling conditions. Background technique [0002] Metasurfaces, two-dimensional manifestations of metamaterials, have attracted extensive attention due to their ability to provide unprecedented lightwave manipulation at the subwavelength scale. The metasurface planar lens uses the principle that the incident light resonates with the metasurface unit to cause a phase change, and the phase can be adjusted by changing the shape and material of the surface unit. Moreover, the sub-wavelength size characteristics of the metasurface can break the limitations brought about by the bulk and bulk of traditional optical devices, and realize more fantastic ideas. [0003] Due to various reasons, the actual phase of the metasurface deviates from ...

AI Technical Summary

Problems solved by technology

This metasurface design also ignores the influence of the close coupling of the cells on the efficiency of the electromagnetic metasurface, and it takes a lot of computing time and memory to build all the corresponding cells of the spectrum.

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