Goos-H(a)nchen and Focal Shift of a Reflected Beam at a Dielectric Interface

摘要

Nonspecular effect of a microwave beam associated with totalreflection(TR) is investigated by means of establishing ray model and angular spectrum representation.These approachs predicts the existence of not only a well-known Goos-H(a)nchen shift(GHS) but also a focal shift.The focal shifts are evaluated at a single dielectric interface, and approximate expressions are derived. At last, we conclude some properties as to the focal shift based on numerical analysis.