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11 October 1999 Production of angular-selective films by interdiffusion for novel spectral responses
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Abstract
Aluminum is a good candidate for both solar and visible angular selectivity if used in metal/high refractive index insulator combinations, but angular selectivity was not observed in Al/TiO2 films prepared in traditional co- deposition techniques. A new approach, deposition of a thin oblique Al layer, then oblique TiO2, and later annealing in vacuum, was attempted and good angular selectivity observed in this material combination. In contrast to other angular selective films, these films showed angular selectivity in s-polarized light for the plane of incidence parallel to the TiO2 columns. Spectral transmittance plots show the effects of Al content and annealing temperature of angular selectivity. SEM micrographs confirm the oblique columnar structure of the annealed complex, and inter-diffusion of Al through the TiO2 columns.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. K. Moazzem M. Hossain and Geoffrey B. Smith "Production of angular-selective films by interdiffusion for novel spectral responses", Proc. SPIE 3789, Solar Optical Materials XVI, (11 October 1999); https://doi.org/10.1117/12.367564
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