Novel ultra-narrow-band wave absorber of metal nano ring column array structure

Abstract

The invention relates to a novel ultra-narrow-band wave absorber of a metal nano ring column array structure. The technical problem of poor quality factor is solved. According to the technical scheme,an ultra-narrow-band absorbing body based on surface lattice resonance is composed of nano ring column arrays, a nano array unit is sequentially provided with a medium layer substrate, a metal film reflecting layer and a resonator from bottom to top, and the thickness of reflecting layer film gold of the nano array unit is greater than the skin depth of an incident electromagnetic wave in precious metal gold. The nano array unit adopts a double-ring-column structure, the full width at half-maximum of the absorption spectrum of the wave absorbing body is compressed, the problems that a traditional wave absorbing body is low in absorbing efficiency, large in full width at half-maximum absorbing, low in quality factor and the like are solved, and the novel ultra-narrow-band wave absorber canbe applied to a narrow-band heat radiator and a plasma biosensor.

Description

technical field [0001] The invention relates to the field of ultra-narrow-band wave absorbers, in particular to a novel ultra-narrow-band wave absorber with a metal nano-ring column array structure. Background technique [0002] In recent years, narrow-band absorbers based on surface lattice resonance have attracted attention in many fields. Nanoscale ultra-narrow-band absorbers have attracted more and more attention because of their small size, high sensitivity, broad market application prospects, and easy mass production. The conventional structure of the traditional narrow-band absorber is a metal-dielectric-metal structure, but the surface lattice resonance effect is less obvious, which significantly reduces the quality factor of the absorber, which limits the application of the narrow-band absorber. [0003] In order to solve the technical problem of the small quality factor of the existing ultra-narrowband absorber, the present invention provides an ultranarrow-band a...

AI Technical Summary

Problems solved by technology

The conventional structure of the traditional narrow-band absorber is a metal-dielectric-metal structure, but the surface lattice resonance effect is less obvious, which significantly reduces the quality factor of the absorber, which limits the application of the narrow-band absorber.

[0003] In order to solve the technical problem of the small quality factor of the existing ultra-narrowband absorber, the present invention provides an ultranarrow-band absorber based on the surface lattice resonance of the nanostructured metal surface, which can generate a strong surface lattice resonance at the resonant absorption wavelength effect and ultra-high optical interaction, resulting in a high quality factor

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