Research On Metamaterials In Radiant Cooling Based On Surface Plasmon Properties

This paper designed and studied the metamaterial absorber based on metal-multidielectric-metal(MMDM)structure,and discussed its development potential in radiative cooling applications.This paper used Finite Element Method(FEM)research the metamaterial absorber,the electromagnetic absorption were calculated by COMSOL software.The wavelength of the designed electromagnetic absorber is in the infrared “atmospheric window”,metamaterial absorption based on different loss mechanisms and influence based on the size and dielectric materials are discussed.The incident angle on the absorption of absorbers in TM and TE modes are also deeply discussed.Based on the application background of radiative cooling,which exhibits selective radiation characteristics in the “atmosphere window”,thermal radiation cooling research is performed in this paper.1?A broadband metamaterial absorber with MMDM structure is designed in this paper.Response characteristics of metal-dielectric structures using surface plasmon polaritions.The resonance absorption superposition of the multi-loss dielectric layer achieved the effect of perfect absorption in the broadband of the “atmospheric window”.In this structure,absorption peaks based on different loss mechanisms are discussed.2?Using COMSOL software to simulate MMDM broadband absorber structure model,analyzing the absorption mechanism,polarization insensitivity and wide-angle incidence.The metamaterial structure was prepared by micro-nano processing technology experiments,and its absorption characteristics were measured by Fourier transform infrared spectrometer.3?The metamaterial absorber radiative cooling method is analyzed.Based on the theory of thermal radiation,the broadband selective radiation characteristics are used to control the structure thermal radiation at the “atmosphere window”.Through the composition of high emissivity in the “atmosphere window” and low emissivity outside the window,this paper was analyzed the effective cooling of radiation temperature.The metamaterial absorber designed in this paper is based on the principle of localized surface plasmon.The metal-multi-dielectric-metal structure is expected to become a new type of radiative cooling material.It has practical significance in the development of engineering heat emitters.