Heterogeneous metasurface for high temperature selective emission
Abstract
We demonstrate selective emission from a heterogeneous metasurface that can survive repeated temperature cycling at 1300 K. Simulations, fabrication, and characterization were performed for a cross-over-a-backplane metasurface consisting of platinum and alumina layers on a sapphire substrate. The structure was stabilized for high temperature operation by an encapsulating alumina layer. The geometry was optimized for integration into a thermophotovoltaic (TPV) system, and was designed to have its emissivity matched to the external quantum efficiency spectrum of 0.6 eV InGaAs TPV material. We present spectral measurements of the metasurface that result in a predicted 22% optical-to-electrical power conversion efficiency in a simplified model at 1300 K. Furthermore, this broadly adaptable selective emitter design can be easily integrated into full-scale TPV systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 25, 2014
- Source ID
- 10.1063/1.4893742
Entities
People
- A. D. Grine
- D. T. Bethke
- D. Woolf
- E. A. Shaner
- J. G. Cederberg
- J. Hensley
Organizations
- Office of Naval Research
- Sandia National Laboratories