C. Tu, Jonathan Hu, C. Menyuk, T. Carruthers, L. Brandon Shaw, L. Busse, J. Sanghera
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Optimized two-layer motheye structures for MgAl2O4 spinel ceramic windows
We computationally study two-layer motheye nanostructures fabricated on MgAl2O4 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.
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