High-Temperature Photonic Structures. Thermal Barrier Coatings, Infrared Sources and Other Applications

Authors: Shklover, Valery; Braginsky, Leonid; Witz, Gregoire; Mishrikey, Matthew; Hafner, Christian

Source: Journal of Computational and Theoretical Nanoscience, Volume 5, Number 5, May 2008 , pp. 862-893(32)

Publisher: American Scientific Publishers

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Abstract:

Successful high-temperature photonic structure design requires a thorough theoretical understanding in several disciplines. In this review, we examine many theoretical questions, as well as published examples of these structures. Research on this topic started with studies of Bragg mirrors, and progressed rapidly as a result of developments in the field of photonic crystals. The practical applications, which have benefited most from this research, have been ceramic thermal barrier coatings for gas turbines, and selective emitters for thermophotovoltaic applications. Materials and fabrication research has allowed for the construction of one-, two- and three-dimensional structures which can operate under extreme temperatures in excess of 1000 °C. Boundary condition approaches can be used to extract the transmission spectra of regular and irregular photonic structures. In particular, it is possible to estimate the propagation of waves in unorganized granular materials and in materials with large pores, where the average size exceeds the mean photon wavelength. Further, we examine the relationship between structure disorder, photon mean free path, and radiation heat transfer. Finally, we outline various numerical techniques used for solving photonic structures, including time and frequency domain techniques, discretization methods, and semi-empirical approaches. By means of an example, we discuss practical steps helpful for the optimization of such structures. A design example for high-temperature photonic structure with low layer count is presented.

Keywords: PHOTONICS; HIGH-TEMPERATURE MATERIALS; THERMAL BARRIER COATINGS; THERMOPHOTOVOLTAICS; IR SOURCES

Document Type: Review article

DOI: 10.1166/jctn.2008.003

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