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Scattering of a Hermite–Gaussian beam field by a chiral sphere

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Abstract

Scattering of a Hermite–Gaussian beam field by a chiral sphere is analyzed. A Hermite–Gaussian beam field is expressed as a superposition of multipole fields at complex-source points. Electromagnetic fields are expanded in terms of the spherical vector wave functions. The unknown expansion coefficients for the scattered field and the internal field are determined by the boundary conditions. As numerical examples, the scattered near fields of the beam incidence are calculated, and the effects of the chirality and the radius of the chiral sphere on the fields are examined. The results for a Gaussian beam incidence are also compared with those of a plane-wave incidence.

© 2001 Optical Society of America

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