Substrate influence on infrared absorption by clusters of small spheres

Victor V. Gozhenko; Leonid G. Grechko; N. G. Shkoda; Keith W. Whites

doi:10.1117/12.502182

14 April 2003 Substrate influence on infrared absorption by clusters of small spheres

Victor V. Gozhenko, Leonid G. Grechko, N. G. Shkoda, Keith W. Whites

Proceedings Volume 5065, Sixth International Conference on Material Science and Material Properties for Infrared Optoelectronics; (2003) https://doi.org/10.1117/12.502182
Event: Sixth International Conference on Material Science and Material Properties for Infrared Optoelectronics, 2002, Kiev, Ukraine

Abstract

In this work we study the effects of a semi-infinite substrate on the electromagnetic properties of a cluster of small spheres in the electrostatic approximation. General expressions for coefficients of the multipole expansion of the electrostatic potential of a sphere accounting for interaction between ambient particles and the substrate are obtained. Expressions for the polarizability tensor and resonant frequencies of a single sphere above a substrate are derived for the case of Lorentzian permittivities of both the sphere and substrate. Optical properties of small spheres are shown to be anisotropic due to the substrate influence.

Citation Download Citation

Victor V. Gozhenko, Leonid G. Grechko, N. G. Shkoda, and Keith W. Whites "Substrate influence on infrared absorption by clusters of small spheres", Proc. SPIE 5065, Sixth International Conference on Material Science and Material Properties for Infrared Optoelectronics, (14 April 2003); https://doi.org/10.1117/12.502182

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