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The Growth and Properties of Thin-Film Nano-Composites

Published online by Cambridge University Press:  10 February 2011

Keith L Lewis ,
A M Pitt  and
A G Culus
Keith L Lewis
Affiliation:
Defence Research Agency, St Andrews Road, Malvern, Worcs WR14 3PS, UK
A M Pitt
Affiliation:
Defence Research Agency, St Andrews Road, Malvern, Worcs WR14 3PS, UK
A G Culus
Affiliation:
Defence Research Agency, St Andrews Road, Malvern, Worcs WR14 3PS, UK
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Abstract

Nano-composites allow a materials engineering approach to be exploited to realise specific characteristics in optical thin film ensembles. For example, films can be produced with refractive indices determined by their average composition on the basis of effective medium approximations, so freeing optical designers from the constraints imposed in pure materials. A summary is presented of the progress made in a fundamental study of films based on diverse materials such as fluorides and sulphides, fabricated using molecular beam deposition techniques. The film properties (eg refractive index, surface morphology, environmental stability) are correlated with microstructure (as determined by cross-sectional TEM techniques). The enhanced properties of the films are discussed in relation to the realisation of periodically modulated graded-index structures of the type required for optical filter applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 457: Symposium V – Nanophase and Nanocomposite Materials II , 1996 , 387
Copyright
Copyright © Materials Research Society 1997

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References

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