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Proceedings Paper

Some Studies Of Hardened Coatings For The Infra-Red
Author(s): K. L. Lewis; A. M. Pitt; I. T. Muirhead; T. J. Wyatt-Davies; A. G. Cullis; G. M. Williams
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Paper Abstract

Sophisticated coatings are increasingly being required for use in a wide variety of laser applications. This work is concerned with a study of the problems influencing the fabrication of such structures using molecular beam techniques. Many of the issues involved are concerned with the achievement of stable structures that do not shift under temperature cycling or laser irradiation. These centre around the fundamental properties of the coating materials selected, the degree of perfection of the films, and the control of microstructure and interface interdiffusion. Results have been obtained, for example, which show the effect of varying the thickness of the reflecting interfaces on the bandwidth and intensity of the fundamental reflection band of Distributed Bragg Reflectors. The degree of interface perfection in such structures has been examined using cross-sectional transmission electron microscopy, and correlated with the results of depth profiling X-ray photoelectron spectroscopy studies.

Paper Details

Date Published: 11 September 1989
PDF: 12 pages
Proc. SPIE 1112, Window and Dome Technologies and Materials, (11 September 1989); doi: 10.1117/12.960773
Show Author Affiliations
K. L. Lewis, Royal Signals and Radar Establishment (UK)
A. M. Pitt, Royal Signals and Radar Establishment (UK)
I. T. Muirhead, OCLI (UK)
T. J. Wyatt-Davies, Royal Signals and Radar Establishment (UK)
A. G. Cullis, Royal Signals and Radar Establishment (UK)
G. M. Williams, Royal Signals and Radar Establishment (UK)


Published in SPIE Proceedings Vol. 1112:
Window and Dome Technologies and Materials
Paul Klocek, Editor(s)

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