Enhanced Smith-Purcell radiation from a bigrating surface through multiplasmon excitation

Journal Article · Tue Dec 01 00:00:00 EST 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.36.5235· OSTI ID:5715102

Glass, N E

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).

• Research Organization: Department of Physics, Naval Postgraduate School, Monterey, California 93943
• OSTI ID: 5715102
• Journal Information: Phys. Rev. A; (United States), Vol. 36:11
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRON BEAMS
DIFFRACTION
PHOTON EMISSION
COLLECTIVE EXCITATIONS
GRATINGS
METALS
PLASMONS
RESONANCE
SOLID-STATE PLASMA
SURFACES
BEAMS
COHERENT SCATTERING
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
LEPTON BEAMS
PARTICLE BEAMS
PLASMA
QUASI PARTICLES
SCATTERING
640301* - Atomic
Molecular & Chemical Physics- Beams & their Reactions