Metamaterial stacked absorber based on titanium nitride dome structure
In terms of optical absorption enhancement,considering the high cost of precious metals,a metamaterial stacked absorber based on titanium nitride circular cone structure was studied. Through the study of plasmon theory and MIM structure theory,it was proven that multi-layer stacked structures can effectively improve the optical parameter matching of the structure,thereby absorption enhancement at specific wavelengths could be achieved. By constructing a structural model of titanium nitride metamaterials,the near-infrared absorption performance of it was analyzed. And the initial structure was optimized,including the thickness of silica on the upper surface,the thickness of silica on the lower surface,the thickness and the diameter of titanium nitride frustum,and the incident light angle. Ultimately,the optimized structural performance was achieved. The average absorption rate is 96.04％ in the wavelength range of 1500-2500 nm. Compared with the initial research model,the absorption efficiency of the optimized model was improved by about 16％.
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