Multiple beam interference with near-grazing waves in dielectric wedges: polarization dependence

G. Rodríguez-Zurita, J. Vázquez-Castillo, J. Pedraza-Contreras

Abstract


Multiple beam interference of near-grazing waves has been recognized as responsible for bright interference patterns in dielectric wedges. Near-grazing waves are traveling waves having wave vectors forming an angle of nearly $\pi $/2 with the normal of a planar surface. When two such surfaces form a wedge with near-grazing waves within, two main features determine interference pattern formation. First, the values of the Fresnel reflection coefficients are close to unity for near-grazing waves. Second, the phase dependence as a function of the gap between surfaces is step-wise nearly constant for the same kind of waves. Both features have polarization dependence, so polarization dependence of interference patterns are also expected. Numerical results for $s$ and $p$ polarizations are presented under monochromatic and polychromatic illuminations. Experimental observations are also shown.

Keywords


Interference; polarization; dielectric interfaces

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Revista Mexicana de Física

ISSN: 2683-2224 (on line), 0035-001X (print)

Bimonthly publication of Sociedad Mexicana de Física, A.C.
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