黑色金属：光吸收体。

Black Metals: Optical Absorbers.

作者信息

Lundgaard Stefan, Ng Soon Hock, Nishijima Yoshiaki, Mazilu Michael, Juodkazis Saulius

机构信息

Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.

Melbourne Centre for Nanofabrication, the Victorian Node of the Australian National Fabrication Facility, 151 Wellington Rd., Clayton, VIC 3168, Australia.

出版信息

Micromachines (Basel). 2020 Feb 28;11(3):256. doi: 10.3390/mi11030256.

DOI:10.3390/mi11030256

PMID:32121168

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7142461/

Abstract

We demonstrate a concept and fabrication of lithography-free layered metal-SiO2 thin-film structures which have reduced reflectivity (black appearance), to as low as 0.9%, with 4.9% broadband reflectance (8.9% for soda lime) in the 500-1400 nm range. The multi-layered (four layers) thin-film metamaterial is designed so that optical impedance matching produces minimal reflectance and transmittance within the visible and infra-red (IR) spectral region for a range of incident angles. The structure has enhanced absorbance and is easily tuned for reduced minimal transmission and reflection. This approach should allow for novel anti-reflection surfaces by impedance matching to be realized.

摘要

我们展示了一种无光刻分层金属 - 二氧化硅薄膜结构的概念与制造方法，该结构具有降低的反射率（黑色外观），在500 - 1400纳米范围内，反射率低至0.9%，宽带反射率为4.9%（钠钙玻璃为8.9%）。这种多层（四层）薄膜超材料的设计使得光阻抗匹配在一系列入射角下，在可见光和红外（IR）光谱区域内产生最小的反射率和透射率。该结构具有增强的吸收率，并且易于调整以降低最小透射率和反射率。这种方法应该能够通过阻抗匹配实现新型抗反射表面。