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  1. 1 Open Physics

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  1. 1 2009

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  1. 1 Ghaffar A.

  2. 1 Naqvi Q.

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Focusing of an electromagnetic plane wave into a uniaxial crystal by a Wood lens

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Ghaffar A., Naqvi Q.
Open Physics
|
2009
|
vol. 7
|
issue 1
41-49
EN
High frequency fields, refracted by a geometry containing a Wood lens placed at a certain distance from a planar uniaxial interface, are derived by using Maslov’s method. The geometrical optics approximation generally valid for high frequency fields fails in the vicinity of a caustic. Maslov’s method is a systematic procedure for predicting the field in the caustic region, combining the simplicity of the ray and the generality of the transform method. Numerical computations are made for the field pattern around the caustic by using Maslov’s method. The results are found to be in good agreement with those obtained using Kirchhoff’s approximation.
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