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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 32, Iss. 1 — Jan. 1, 1993
  • pp: 102–110

Optical properties of a metal island film close to a smooth metal surface

Alfred Leitner, Zhensheng Zhao, Harald Brunner, Franz R. Aussenegg, and Alexander Wokaun  »View Author Affiliations


Applied Optics, Vol. 32, Issue 1, pp. 102-110 (1993)
http://dx.doi.org/10.1364/AO.32.000102


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Abstract

Bright colors have been observed when a metal island film is deposited on top of a silver mirror with a separating quartz layer. For spacer layer thicknesses that are varied from 0 to 140 nm, the visual appearance changes from blue/black to a series of brilliant spectrumlike colors. The sequence is repeated similarly for higher interlayer thicknesses. The phenomenon is analyzed in terms of a stratified medium theory by using TEM data and an electromagnetic model for the optical constants of the metal island film. For island films with a sufficiently high absorbance (> 0.35), the spectra are characterized by two sharp minima where the reflectivity drops to values below 10−3. The observed thickness dependence is analyzed in terms of a complex combination of the phase shifts caused by the island film, the spacer, and the relevant interfaces.

© 1993 Optical Society of America

History
Original Manuscript: November 9, 1991
Published: January 1, 1993

Citation
Alfred Leitner, Zhensheng Zhao, Harald Brunner, Franz R. Aussenegg, and Alexander Wokaun, "Optical properties of a metal island film close to a smooth metal surface," Appl. Opt. 32, 102-110 (1993)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-32-1-102

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