Lateral displacement of a beam incident from a uniaxial

BONOMO, NÉSTOR; DEPINE, RICARDO

JOURNAL OF MODERN OPTICS

Taylor & Francis

Año: 1997 vol. 44 p. 1393 - 1408

0950-0340

The reflection of spatially limited beams at the flat boundary between a uniaxial crystal and a metal is studied theoretically. Incident limited beams are expanded in terms of the ordinary and extraordinary plane waves that can be propagated in uniaxial media. The spatial modifications in ordinary and extraordinary reflected field distributions are numerically calculated. Several effects, including polarization conversion between ordinary and extraordinary waves and field enhancement on the interface due to the excitation of surface waves, are discussed. The numerical calculations of the Goos-Hanchen lateral shift in the reflected fields are compared with the results predicted by the extension to uniaxial media of the stationary phase approximation used for limited beams in isotropic media.