Noble-metal-based transparent infrared-reflectors : Preparation and analysis of thin gold films.

G. B. Smith; G. A. Niklasson; J. S. E. M. Svensson; C. G . Granqvist

doi:10.1117/12.966295

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2 December 1985 Noble-metal-based transparent infrared-reflectors : Preparation and analysis of thin gold films.

G. B. Smith; G. A. Niklasson; J. S. E. M. Svensson; C. G . Granqvist

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Proceedings Volume 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV; (1985) https://doi.org/10.1117/12.966295
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

Very thin gold layers were produced on glass by evaporation with and without simultaneous ion bombardment. Electron microscopy showed that films with thicknesses below a certain magnitude - which decreased with increasing ion flux - had a non-uniform (network) structure. Optical properties were measured by spectrophotometry in the 0.3-50-μm range. w Uniform films were consistent with the Drude theory with an anomalously large frequency dependence of the relaxation energy. Non-uniform films displayed characteristic plateaus in the near-infrared transmittance. This feature, which is conducive to high solar transmittance, can be explained from effective medium theories based on the film structure. Our results are important for the development of improved noble-metal-based infrared-reflectors for energy efficient windows.

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G. B. Smith, G. A. Niklasson, J. S. E. M. Svensson, and C. G . Granqvist "Noble-metal-based transparent infrared-reflectors : Preparation and analysis of thin gold films.", Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); doi: 10.1117/12.966295; https://doi.org/10.1117/12.966295

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