A perturbation theory for light diffraction from a bigrating with multiple surface-polariton excitation
By: Nathaniel  E. Glass
Contributors: Naval Postgraduate School (U.S.). Dept. of Physics
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1986
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 18
Subjects: DIFFRACTION; PLASMONS
Other titles: NPS-61-87-003.
Description: 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.
Notes: Cover title.

"NPS-61-87-003."

"December 1986."

"Technical report."

AD A176 332.

Includes bibliographical references (p. 17).

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