Plasmonic structures with highly directional beaming properties

Date
2006
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Journal of Physics: Conference Series
Print ISSN
1742-6588
Electronic ISSN
Publisher
IOP
Volume
36
Issue
Pages
41 - 45
Language
English
Type
Conference Paper
Journal Title
Journal ISSN
Volume Title
Series
Abstract

We studied the diffraction of electromagnetic waves from subwavelength metallic circular apertures in the microwave spectrum. The metallic samples had a subwavelength hole with a diameter of 8 mm and had concentric grooves with a periodicity of 16 mm. We present the angular transmission distributions from circular annular apertures, and circular annular apertures surrounded by concentric periodic grooves. At the surface mode resonance frequency the transmitted electromagnetic waves from the subwavelength circular annular aperture surrounded by concentric periodic grooves have a strong angular confinement with an angular divergence of 3°. This represents a fourfold reduction when compared to the angular divergence of the beam transmitted from the subwavelength circular aperture.

Course
Other identifiers
Book Title
Keywords
Plasmonic structures, Electromagnetic waves, EM waves
Citation
Published Version (Please cite this version)