Open AccessSwitchable beaming from a nanoslit with metallic gratings controlled by the phase difference between incident beams
Author(s) -
Kyuho Kim,
Seung–Yeol Lee,
Hansik Yun,
Jun-Bum Park,
Byoungho Lee
Publication year - 2014
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.22.005465
Subject(s) - optics , surface plasmon polariton , surface plasmon , interference (communication) , diffraction , interferometry , diffraction grating , phase (matter) , ray , materials science , diffraction efficiency , plasmon , physics , channel (broadcasting) , electrical engineering , quantum mechanics , engineering
We propose a switching method for optical beaming generated from a metal slit surrounded by surface gratings. The principle of the method is based on the interference of diffracted surface plasmon polaritons from the gratings which are controlled by the relative phases of two oblique incident beams that are illuminated on the metal slit. By adjusting the relative position of the interference pattern of the incident beams with respect to the metal slit, beaming from the proposed structure can be switched from the on- to the off-mode by virtue of the change in the symmetry of the generated surface plasmon polaritons. An experimental demonstration of the method is presented in which an electrically controlled interferometric configuration is used.