Open AccessMultiple directional beaming effect of metallic subwavelength slit surrounded by periodically corrugated grooves
Author(s) -
Yugang Liu,
Haofei Shi,
Changtao Wang,
Chunlei Du,
Xiangang Luo
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.004487
Subject(s) - optics , slit , surface plasmon , diffraction , surface plasmon polariton , physics , materials science , plasmon
It is demonstrated that multiple directional beaming effect can be realized by a metallic subwavelength slit surrounded by finite number of grooves based on mode expansion method. Each of the directional beaming is formed by superimposing two diffraction orders of spoof surface plasmon excited on the two corrugated sides of the slit. This delivers high contrast and considerably uniform energy distribution for the beaming directions.