Analyticity of the angular spectrum amplitude of scattered fields and some of its consequences

Abstract

Analytic properties of the angular spectrum amplitude of the field scattered from a finite object with a continuous scattering potential are established, and some of its consequences are discussed. In particular, it is shown that the scattered field must contain both homogeneous and evanescent waves, unless it vanishes everywhere outside the scattering volume.

© 1985 Optical Society of America

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