Manufacturing method of frequency selective surface based on femtosecond laser induced graphene

Through femtosecond laser-induced graphene technology, a multi-layer nested resonant structure is formed on a flexible substrate, solving the problem of multi-band frequency surface selection manufacturing, and achieving high-precision, large area, low cost and environmentally friendly frequency selection characteristics.

CN120357191AActive Publication Date: 2025-07-22SUZHOU XIANGYI NETWORK TECH
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Patent Information

Application Number
CN202510846597.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-24
Publication Date
2025-07-22
Estimated Expiration
2045-06-24

AI Technical Summary

Technical Problem

The prior art is difficult to efficiently and at low cost to manufacture multi-band frequency selection surfaces, and traditional methods are difficult to achieve flexible and large-area frequency selection surfaces, and there are environmental pollution problems.

Method used

Femtosecond laser induced graphene technology is used to form a periodic micro-nano structure on a flexible substrate. Graphene resonant units of different geometric shapes are stacked layered, and dynamic scanning and energy regulation are combined to achieve frequency selection characteristics of large areas and multi-bands.

Benefits of technology

It realizes independent regulation of multiple frequency bands on a single panel, reduces the complexity of traditional multi-layer structures, has high precision, flexibility and large-area processing capabilities, and avoids contamination from mechanical or chemical etching.

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Abstract

A frequency selection surface manufacturing method based on femtosecond laser induced graphene belongs to the technical field of frequency selection surface manufacturing and comprises the following steps: (1) graphene patterning: forming a graphene periodic micro-nano structure on the surface of a flexible substrate through induction by femtosecond laser; (2) a frequency selection unit structure design step: a nested resonance structure is obtained by layering and stacking graphene resonance units with different geometrical shapes, and selective transmission or reflection of multi-band electromagnetic waves is realized; the graphene resonance unit is the graphene periodic micro-nano structure; and (3) a large-area manufacturing step: processing a frequency selection surface with the area larger than 10cm < 2 > by adopting femtosecond laser dynamic scanning and energy regulation and control technologies. According to the invention, the local structure modification of the graphene is induced by femtosecond laser, and the metasurface design is combined, so that the large-area and multi-band frequency selection characteristic is realized.
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