Share Email Print

Proceedings Paper

Unidirectional surface plasmon polariton excitation at asymmetrical periodic metallodielectric multilayers
Author(s): A. Roszkiewicz; W. Nasalski
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A new configuration of the one-dimensional reflective asymmetrical metallodielectric grating structure for unidirectional excitation of surface plasmon polaritons (SPPs) is proposed. The structure is embedded between two different dielectric media and composed of two 1D metallic gratings each of the two consisted of periodically placed rectangular metal stripes. The case of normal incidence is analysed. It is shown that even a small horizontal shift between these two layers or a change in dielectric contrast of the grating fillings, the structure may redirect an energy flow of the SPP in the near field. An explanation of this unidirectional SPP excitation is given. Besides the SPP excitation by a plane wave, the excitation by a finite-diameter 3D Gaussian beam is analysed as well, as the beam facilitates visualisation of the SPP finite propagation length and efficiency of the directivity switch. It is shown that the switching phenomenon exists together with a high concentration of the electromagnetic field at the structure, the feature especially desirable in techniques of subwavelength nanovisualisation. The configurations analysed may be also useful in designing optical devices as optical switches, VLSI devices, light harvesting photodetector structures or, in general, in any case where efficient control of energy propagation directivity is of primary importance.

Paper Details

Date Published: 1 May 2012
PDF: 11 pages
Proc. SPIE 8424, Nanophotonics IV, 842426 (1 May 2012); doi: 10.1117/12.921798
Show Author Affiliations
A. Roszkiewicz, Institute of Fundamental Technological Research (Poland)
VIGO System S.A. (Poland)
W. Nasalski, Institute of Fundamental Technological Research (Poland)

Published in SPIE Proceedings Vol. 8424:
Nanophotonics IV
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

© SPIE. Terms of Use
Back to Top