超高温金属纳米结构增强吸收特性的仿真研究

Simulation research on absorption enhancement characteristics of ultra-high temperature metal nanostructures

利用表面等离子体改变材料吸收光谱特性越来越受到关注。为了增强超高温金属纳米结构的吸收特性,设计了超高温金属-金属以及膜层-金属-金属表面等离子体周期纳米结构,仿真分析其在波长200~4 000 nm光谱范围内,不同参数对材料吸收谱特性的影响。仿真分析表明,不同参数的吸收光谱中均会出现吸收峰,且吸收率达93%以上。而介电材料、金属纳米结构的周期、尺寸和深度是影响吸收率的主要因素。同时,介电材料和周期还会对吸收峰出现的位置产生影响。该仿真结果为超高温表面等离子体材料的吸收特性应用的研究提供了理论基础。

The selectivity of absorption spectrum by using surface plasmonics have attracted more and more research attentions. In this paper, the periodical surface plasmonic nanostructures were presented, which consist of metal nanostructures on metallic substrate, to enhance absorption rate of ultra-high temperature metal nanostructures. The characteristics of materials＇ absorption have been simulated and analyzed by changing different parameters in the range of wavelength 200-4000 nm. The simulation results indicate that there always appear absorption peaks and they reach over 93% at absorption spectrum with all different parameters. The dielectric material, period, depth and size of nanostructure are the main factors for the absorption spectrum. Further, the dielectric material and period of nanostructure also have obvious selectivity characteristics on the position of absorption peak. The study results can provide theoretical foundation for ultra-high temperature surface plasmonic materials absorption characteristics.