New effective medium models and their applications

Thin films and many surfaces often have complex structures which are conveniently analysed for overall optical response by effective medium models. Examples from new deposition techniques and new exact theory are presented that highlight effects that are not predictable by many of the widely used si...

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Bibliographic Details
Published in:Vacuum 1995-08, Vol.46 (8), p.935-938
Main Authors: Dligatch, S, Ng, MW, Smith, GB, Reuben, AJ, Radchik, AV, Vagov, AV
Format: Article
Language:English
Subjects:
Composite materials
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Physics
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Summary:Thin films and many surfaces often have complex structures which are conveniently analysed for overall optical response by effective medium models. Examples from new deposition techniques and new exact theory are presented that highlight effects that are not predictable by many of the widely used simple effective medium models. High order multipoles and associated multiple resonances play a key role and alter spectral response and transport properties markedly. The new theories can discriminate the short range forces between neighbouring pairs and longer range forces in chains and arrays. Experimental data on composite films show how changes in component distribution can strongly effect spectral absorptance in ways that are not predictable by standard dipole theories.
ISSN:0042-207X
1879-2715
DOI:10.1016/0042-207X(95)00076-3