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J Opt Soc Am A Opt Image Sci Vis. 2005 Jan;22(1):190-8.

Reflection and refraction of multipole radiation by an interface.

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  • 1Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.


Reflection and refraction of electromagnetic multipole radiation by an interface is studied. The multipole can be electric or magnetic and is of arbitrary order (dipole, quadrupole). From the angular spectrum representation of the radiation emitted by the multipole, I have obtained the angular spectrum representations of the reflected and transmitted fields, which involve the Fresnel reflection and transmission coefficients. The intensity distribution in the far field is evaluated with the method of stationary phase. The result is very simple in appearance and can be expressed in terms of two auxiliary functions of a complex variable. By exchanging the Fresnel coefficients for s and p polarization, the result for an electric multipole can be obtained from the result for a magnetic multipole.

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