Optimized two-layer motheye structures for MgAl₂O₄ spinel ceramic windows
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Date
2021-07-22
Type of Work
Department
Program
Citation of Original Publication
Chaoran Tu, Jonathan Hu, Curtis R. Menyuk, Thomas F. Carruthers, L. Brandon Shaw, Lynda E. Busse, and Jasbinder S. Sanghera, "Optimized two-layer motheye structures for MgAl₂O₄ spinel ceramic windows," OSA Continuum 4, 2143-2153 (2021). https://doi.org/10.1364/OSAC.428319
Rights
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Public Domain Mark 1.0
Abstract
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.