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探讨了基于金属钒亚微米结构的表面等离子体宽带广角红外光吸收器,它由置于表面涂覆介质层的金属钒衬底上方周期性排列的无限长钒条构成。使用有限元方法计算了其吸收谱,当P极化平面电磁波以小角度(小于20°)入射时,吸收率达到98%以上,波长为1.08～1.60μm;当P极化平面波以大角度(小于50°)入射时,吸收率达到98%以上,波长为1.08～1.44μm;当P极化平面波以10°入射时,谐振峰(λ=1.54μm)的吸收率达到99.9%。此外,由于金属钒的熔点很高,基于金属钒的吸收器可用于强光高功率的场合。
The surface plasmon broadband wide-angle infrared light absorber based on the metallic vanadium submicron structure is discussed. It consists of infinitely-long vanadium strips arranged periodically above the metallic vanadium substrate coated with the dielectric layer. The absorption spectrum was calculated by using the finite element method. When the P-polarized plane electromagnetic wave is incident at a small angle (less than 20 °), the absorption rate reaches more than 98% and the wavelength is 1.08-1.60 μm. When the P-polarized plane wave is incident at a large angle Less than 50 °), the absorptivity reached more than 98% and the wavelength was 1.08-1.44μm. The absorption peak of the resonance peak (λ = 1.54μm) reached 99.9% when the P-polarized plane wave was incident on 10 °. In addition, due to the high melting point of vanadium metal, vanadium-based metal absorber can be used for glare and high power applications.