Abstract

The infrared (IR) transmission and reflection properties of the ceramic thermal barrier coatings have great implications on the overall performance of a component operated at high temperatures, where a significant amount of heat from external IR radiation will propagate through the coating toward the underlying substrate. A high-temperature photonic structure can be used to limit this radiation transport while operating at temperatures above 1000°C. Herein, we present the concept of a broadband and angle-insensitive IR reflector, based on 3D photonic crystals (PhCs) that consists of a ceramic material with high thermal stability and low thermal conductivity. We numerically demonstrate that the multistack ceramic 3D PhCs can provide >80% of bi-hemispherical reflectance in the wavelength region of 15μm.

©2012 Optical Society of America

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