Light absorption structure

Abstract

The invention proposes a light absorption structure, and the structure can achieve the broadband and efficient absorption of electromagnetic radiation from the outside. The structure comprises a supporting layer, a metal film layer, a trap layer and a nanometer composite layer, wherein the supporting layer, the metal file layer, the trap layer and the nanometer composite layer are sequentially setfrom the inside to the outside, and the nanometer composite layer consists of a film substrate and embedded metal nano-particles. The volume filling factor of the embedded metal nano-particles is within the range of 5%-30%, thereby meeting the requirement for triggering the surface plasma effect of the incident electromagnetic radiation on the surface of the metal nano-particles. The incident electromagnetic radiation forms a surface plasma at the joint of the metal film layer and the trap layer. The two types of surface plasmas which are spatially separated perform the symmetric plasma coupling effect in the trap layer. The structure gives consideration to the absorption frequency band and the high absorption efficiency, and can greatly inhibit the sensitivity of the wave absorption characteristics to the incident angle of the electromagnetic radiation.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic protection, and in particular relates to a light absorbing structure. Background technique [0002] With the development of modern science and technology, the influence of electromagnetic wave radiation on the environment is increasing day by day. At airports, aircraft flights are often delayed due to electromagnetic wave interference; in hospitals, interference sources such as mobile phones often interfere with the normal work of various electronic medical instruments. Therefore, controlling electromagnetic pollution and finding a material that can efficiently weaken electromagnetic radiation has become a major topic in the field of electromagnetic protection technology. At present, it is a commonly used method in this technical field to suppress the interference to the target through strong absorption of electromagnetic wave radiation. [0003] At present, according to the material for...

AI Technical Summary

Problems solved by technology

However, the wave-absorbing materials designed based on metamaterials are bound to be affected by the resonant characteristics of the metamaterials themselves, resulting in shortcomings such as narrow operating frequency bands and sensitivity to wave incident angles, which have become key bottleneck technologies restricting the development and application of this type of technology.

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