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Estimation of the influence of finite dielectric substrates on the far-field pattern of an array of metallic scatterers in the infrared

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Rico-García, José María and López-Alonso, José Manuel and Alda, Javier (2005) Estimation of the influence of finite dielectric substrates on the far-field pattern of an array of metallic scatterers in the infrared. Infrared Physics & Technology, 46 (4). pp. 267-276. ISSN 1350-4495

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Official URL: http://dx.doi.org/10.1016/j.infrared.2004.04.004




Abstract

The far-field scattered in the infrared by an arrangement of metallic structures deposited on a dielectric wafer is estimated in this paper. The scattering is modelled by using operators that describe the far field obtained under the regime applicable for the Babinet's principle in its vectorial approach and the Stratton–Chu approximation. The far-field scattered by an arrangement of thin gold layers over a dielectric wafer under infrared illumination is computed. The model assumes a normally incident vectorial Gaussian beam focused over the arrangement plane. An angular spectrum decomposition of the field is done. Then, every plane wave is scattered by the whole structure: arrangement + substrate layer. The reflexions in the substrate layer and the arrangement action have been taken into account in an operator formalism. Numerical results estimating the influence of substrate thickness on the pattern are obtained.


Item Type:Article
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Es una versión postprint.

Uncontrolled Keywords:Antennas ; Infrared ; Scattering ; Far-field pattern
Subjects:Sciences > Physics > Optics
Medical sciences > Optics > Optoelectronics
Medical sciences > Optics > Physical optics
ID Code:35192
Deposited On:25 Jan 2016 17:06
Last Modified:25 Jan 2016 17:06

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