Oblique launching of optical surface waves by a subwavelength slit

Abstract

The electromagnetic field on the metal surface launched by a subwavelength slit is analytically studied, for the case when the fundamental mode inside the slit has a wavevector component along the slit axis (conical mount). Both near-field and far-field regions are discussed, and the role of surface plasmon-polaritons and Norton waves is revealed. It is shown that the distance from the slit at which NW are more intense than surface plasmons decrease with parallel wavevector, which could help experimental studies on Norton waves. Additionally, it is found that the s-polarization component, while present for any non-zero parallel wavevector, only weakly contributes to the NWs.

8 pages, 5 figures

References in corpus (4)

• Efficient unidirectional nanoslit couplers for surface plasmons
• A microscopic view of the electromagnetic properties of sub-wavelength metallic surfaces
• Scattering of surface plasmons by one-dimensional periodic nanoindented surfaces
• Optical surface waves over metallo-dielectric nanostructures: Sommerfeld integrals revisited

Cited by in corpus (1)

• he plasmon-polariton scattering by random-impedance surface defects: The interplay between localization and outflow