Some Studies Of Hardened Coatings For The Infra-Red

K. L. Lewis; A. M. Pitt; I. T. Muirhead; T. J. Wyatt-Davies; A. G. Cullis; G. M. Williams

doi:10.1117/12.960773

11 September 1989 Some Studies Of Hardened Coatings For The Infra-Red

K. L. Lewis, A. M. Pitt, I. T. Muirhead, T. J. Wyatt-Davies, A. G. Cullis, G. M. Williams

Proceedings Volume 1112, Window and Dome Technologies and Materials; (1989) https://doi.org/10.1117/12.960773
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

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.

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K. L. Lewis, A. M. Pitt, I. T. Muirhead, T. J. Wyatt-Davies, A. G. Cullis, and G. M. Williams "Some Studies Of Hardened Coatings For The Infra-Red", Proc. SPIE 1112, Window and Dome Technologies and Materials, (11 September 1989); https://doi.org/10.1117/12.960773

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