Enhanced Smith-Purcell radiation from a bigrating surface through multiplasmon excitation
Loading...
Authors
Glass, N.E.
Subjects
Advisors
Date of Issue
1987-12-01
Date
Publisher
American Physical Society
Language
Abstract
A theory is presented of the Smith-Purcell diffraction radiation from a beam of point charges passing over a finitely conducting bigrating surface, with arbitrary orientation of the beam relative to the bigrating axes. The beam's field can resonantly excite one or more surface-plasmon polaritons, which the bigrating can then decouple into a single outward radiating wave at any given angle and frequency. This radiation, arising from the collective motion of the electrons in a surface plasmon, has been shown theoretically to enhance the radiated power by two or three orders of magnitude in the peak direction. Numerical implementation of the present theory has shown that there is an optimal grating height at which this surface-plasmon-enhanced radiation peak is at a maximum. This work has also shown that a sinusoidal bigrating, forming a rectangular lattice, can yield an added enhancement, through two-plasmon excitation, when compared to the radiation
from a classical grating (periodic in one direction).
Type
Article
Description
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
This work was supported by the U.S. Army Research Office, under Contract No. MIPR-ARO-150-86
Funding
Format
16 p.
Citation
Physical Review A, v. 36, no. 11, December 1, 1987, pp. 5235-5250