采用自组装方法在太赫兹频率范围内制造具有抗反射半球形表面结构。

Simple fabrication of an antireflective hemispherical surface structure using a self-assembly method for the terahertz frequency range.

机构信息

School of Information and Communications, Gwangju Institute of Science and Technology, 1 Oryongdong, Buk-gu, Gwangju 500-712, South Korea.

出版信息

Opt Lett. 2012 Jul 1;37(13):2742-4. doi: 10.1364/OL.37.002742.

DOI:10.1364/OL.37.002742

PMID:22743514

Abstract

A hemispherical surface structure was fabricated on a sapphire substrate by utilizing a self-assembly and spin-coating process for a terahertz (THz) antireflection coating. The self-assembled glass spheres and spin-coated material led to a gradual change in the effective refractive index. The aspect ratio of the hemispherical surface structure was controlled easily by adjusting the thickness of the B-staged bisbenzocyclobutene used as a coating. The reflectance of the fabricated hemispherical surface structure, having a period of 140 μm, exhibited low reflectance and low Fabry-Perot resonance in a THz spectral range from 0.1 to 1.9 THz.

摘要

在蓝宝石衬底上通过自组装和旋涂工艺制造了半球形表面结构，用于太赫兹（THz）抗反射涂层。自组装的玻璃球和旋涂材料导致有效折射率逐渐变化。通过调整用作涂层的 B 阶双环丁烯的厚度，可以轻松控制半球形表面结构的纵横比。具有 140μm 周期的半球形表面结构的反射率在 0.1 到 1.9 THz 的太赫兹光谱范围内表现出低反射率和低法布里-珀罗共振。