Dynamic control of polarized thermal emission from VO2 nanofins

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-10-01 DOI:10.1117/1.JPE.11.042111

Caleb Estherby, M. Arnold, M. Tai, A. Gentle

引用次数: 0

Abstract

Abstract. We demonstrate switchable polarized thermal emission from VO2 nanofin stacks fabricated by co-deposition, etching, and oxidation. We find that reverse switching of the thermal emission is enabled by a reflecting underlayer and induced by either short oxidation time or additional deposition of a reflecting underlayer. Observed thermal emission is well explained by a biaxial Bruggeman effective medium model, which predicts the strong polarization change for aligned fin layers in the micron thickness range. The dominant polarization of the emission is modulated by the presence of a reflector, oxidation of the fins, fin fill-factor, and structural anisotropy. Normal incidence polarized emittance change of up to 0.6 is theoretically possible, and we were able to demonstrate a change of 0.34, similar to that predicted by the model.

查看原文本刊更多论文

VO2纳米纤维极化热发射的动态控制

摘要我们展示了通过共沉积、蚀刻和氧化制造的VO2纳米纤维堆叠的可切换极化热发射。我们发现，热发射的反向切换是由反射底层实现的，并且是由短氧化时间或反射底层的额外沉积引起的。双轴Bruggeman有效介质模型很好地解释了观测到的热发射，该模型预测了在微米厚度范围内排列的翅片层的强极化变化。发射的主要偏振由反射器的存在、翅片的氧化、翅片填充因子和结构各向异性调制。理论上，高达0.6的正入射极化发射度变化是可能的，我们能够证明0.34的变化，类似于模型预测的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.