铋基宽带超材料吸收体

IF 1.1 4区 物理与天体物理 Q4 NANOSCIENCE & NANOTECHNOLOGY
Fan Wang, H. Fan, Xianghua Zeng
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引用次数: 2

摘要

摘要采用时域有限差分法对超材料宽带吸收体进行了数值模拟。吸收剂采用四层结构,由上至下分别为二氧化钛(TiO2)矩形对、铋(Bi)层、二氧化硅(SiO2)层和氮化钛(TiN)层,且TiO2矩形对周期性对称排列成矩形阵列。优化结果表明,所设计吸收剂在500 ~ 3500nm波长范围内的平均吸收率为97.6%,在811 ~ 3162 nm (2351 nm)波长范围内的平均吸收率可达99%。通过对电磁场分布的分析,进一步发现金属铋具有局部表面等离子体共振和传播等离子体共振的耦合特性以及良好的吸收和宽带吸收特性。所设计的吸收体具有极化和温度不敏感的特性,结构简单,易于制作。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bismuth-based broadband metamaterial absorber
Abstract. A numerical simulation of a metamaterial broadband absorber is performed using the finite-difference time-domain method. The absorber adopts a four-layer structure with titanium dioxide (TiO2) rectangular pairs, a bismuth (Bi) layer, a silicon dioxide (SiO2) layer, and a titanium nitride (TiN) layer from top to bottom, respectively, and the TiO2 rectangular pairs are periodically and symmetrically arranged in a rectangular array. The optimization results show that the average absorption of the designed absorber is 97.6% in the wavelength range of 500 to 3500 nm and the average absorption can reach 99% in the wavelength range of 811 to 3162 nm (2351 nm). The coupling of local surface plasmon resonance and propagating plasmon resonance and the good absorption and broadband absorption properties exhibited by metallic Bi were further found by analyzing the distribution of electromagnetic fields. The designed absorber has polarization and temperature-insensitive properties and a simple structure and is easily fabricated.
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来源期刊
Journal of Nanophotonics
Journal of Nanophotonics 工程技术-光学
CiteScore
2.60
自引率
6.70%
发文量
42
审稿时长
3 months
期刊介绍: The Journal of Nanophotonics publishes peer-reviewed papers focusing on the fabrication and application of nanostructures that facilitate the generation, propagation, manipulation, and detection of light from the infrared to the ultraviolet regimes.
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