Experimental validation of strong directional selectivity in nonsymmetric metallic gratings with a subwavelength slit
- 31 January 2011
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 98 (5)
- https://doi.org/10.1063/1.3552675
Abstract
Strong directional selectivity is theoretically predicted and experimentally validated at the microwave frequencies in the beaming regime for a single subwavelength slit in nonsymmetric metallic gratings with double-side corrugations. The operation regime can be realized at a fixed angle of incidence when the surface-plasmon assisted transmission is significant within a narrow range of observation angles, if illuminating one of the grating interfaces, and tends to vanish for all observation angles, if illuminating the opposite interface. The studied effect is connected with asymmetry (nonreciprocity) in the beaming that occurs if the surface plasmon properties are substantially different for the two interfaces being well isolated from each other. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3552675]Keywords
Funding Information
- European Union (109E301, 107A004, 107A012)
- Deutsche Forschungsgemeinschaft (SE1409/2-1)
This publication has 22 references indexed in Scilit:
- Highly directional emission from photonic crystals with a wide bandwidthApplied Physics Letters, 2007
- Off-axis directional beaming of optical field diffracted by a single subwavelength metal slit with asymmetric dielectric surface gratingsApplied Physics Letters, 2007
- Beaming of electromagnetic waves emitted through a subwavelength annular apertureJournal of the Optical Society of America B, 2006
- Plasmonics: Merging Photonics and Electronics at Nanoscale DimensionsScience, 2006
- Experimental Verification of Designer Surface PlasmonsScience, 2005
- Extraordinary grating-coupled microwave transmission through a subwavelength annular apertureOptics Express, 2005
- Mimicking Surface Plasmons with Structured SurfacesScience, 2004
- Beaming Light from a Subwavelength ApertureScience, 2002
- Extraordinary optical transmission through sub-wavelength hole arraysNature, 1998
- Theory of Diffraction by Small HolesPhysical Review B, 1944