Optimized two-layer motheye structures for MgAl 2 O 4 spinel ceramic windows

作者：Chaoran Tu, Jonathan Hu, Curtis R. Menyuk, Thomas F. Carruthers, L. Brandon Shaw, Lynda E. Busse, Jasbinder S. Sanghera · 发表于：OSA Continuum · 年份：2021 · DOI：10.1364/osac.428319 · 被引用次数：7 · 研究领域：Optical Coatings and Gratings、Photonic Crystals and Applications、Photonic and Optical Devices

We computationally study two-layer motheye nanostructures fabricated on MgAl 2 O 4 spinel ceramic windows. We investigated the parameters of the structure, including height, width, and shape, in order to optimize its power transmission efficiency over a broad bandwidth. We found a two-layer motheye structure in which the cones of the upper structure have a concave shape that can theoretically achieve more than 99.8% transmission at normal incidence in the wavelength range between 0.4 μm and 5.0 μm.