A perturbation theory for light diffraction from a bigrating with multiple surface-polariton excitation
Loading...
Authors
Glass, Nathaniel E.
Subjects
Advisors
Date of Issue
1986-12
Date
1986-12
Publisher
Monterey, CA; Naval Postgraduate School
Language
en_US
Abstract
A perturbation theory has recently been developed for treating the diffration of light, with surface polariton resonant excitation, from a bigrating surface. The theory is an approximation, to first order in the grating height, of an earlier theory based on the Rayleigh hypothesis. The perturbation theory holds for arbitrary polarization and for arbitrary plane of incidence with respect to the grating directions. It is, however, limited to treating only the possibility of two simultaneous resonant evanescent waves, whereas four are possible at normal incidence on a square grating, and three are possible on a rectangular grating. The present work generalizes the earlier work to allow for a four fold (or three fold) resonance. This extension also allows one now to determine the complex dispersion relation for surface-polaritons, for wavevectors at the intersection of two Brillouin zone boundary lines (not possible in the previous formulation). Keywords: Smith Purcell radiation; Bigrating; Grating; Surface plasmon; Polariton
Type
Technical Report
Description
Series/Report No
Department
Dept. of Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
NPS-61-87-003
Sponsors
Funder
Format
18 p. ; 28 cm.