Bismuth-based broadband metamaterial absorber

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-07-01 DOI:10.1117/1.JNP.16.036004

Fan Wang, H. Fan, Xianghua Zeng

引用次数: 2

Abstract

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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铋基宽带超材料吸收体

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。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.