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Optical Engineering

Role of granular structure in metal layers on the optical properties of absorbing mirrors
Author(s): H. Walter; G. Bauer; Ralph Domnick; Georg Jakopic; Alfred Leitner
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Paper Abstract

Absorbing mirrors are optical thin film systems consisting of an absorbing metal layer held by a transparent interlayer in defined distance to a (metal) mirror layer. In the reflected light, such three-layer systems show vivid color effects due to the absorption in the metal. This absorption is modified and enhanced by interference effects. The interference condition can be tuned by the thickness of the transparent interlayer. We show by experimentation and by stratified medium model calculations the importance of a nanoscale granular structure in the absorbing metal layer for obtaining a wide spectral range of the color effect.

Paper Details

Date Published: 1 October 2006
PDF: 9 pages
Opt. Eng. 45(10) 103801 doi: 10.1117/1.2363167
Published in: Optical Engineering Volume 45, Issue 10
Show Author Affiliations
H. Walter, Identif GmbH (Germany)
G. Bauer, Identif GmbH (Germany)
Ralph Domnick, Identif GmbH (Germany)
Georg Jakopic, Joanneum Research GmbH (Austria)
Alfred Leitner, Karl-Franzens-Univ. Graz (Austria)

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