Tunable Optical Filter Based on Gold and Silver Double-Sided Gratings and its Application as Plasmonic Sensor

Author

Nghia Nguyen-Huu ; Cada, Michael ; Pistora, Jaromir ; Yasumoto, Kiyotoshi

Author_Institution

Nanotechnol. Center, VSB-Tech. Univ. of Ostrava, Ostrava, Czech Republic

Volume

32

Issue

21

fYear

2014

fDate

Nov.1, 1 2014

Firstpage

4079

Lastpage

4086

Abstract

Doubled-sided grating structures including two identical single-layered metal gratings separated by a dielectric layer exhibit enhanced optical transmission in the visible region for transverse magnetic polarized light. The maximum transmission (71%) is attributed to a resonance of magnetic polaritons while the minimum one (5%) is found to be caused by surface plasmons between metal and dielectric layers. The transmission resonance of the grating structures is analyzed by varying their geometrical parameters and materials in order to evaluate different potential applications such as tunable optical filters, polarizers, and self-suspended-type plasmonic sensors.

Keywords

diffraction gratings; gold; light polarisation; optical filters; optical sensors; optical tuning; plasmonics; polaritons; silver; surface plasmon resonance; ultraviolet spectra; visible spectra; Au-Ag; dielectric layer; double-sided grating structures; geometrical parameters; gold double-sided gratings; magnetic polariton resonance; optical transmission; polarizers; self-suspended-type plasmonic sensors; silver double-sided gratings; single-layered metal gratings; surface plasmons; transmission resonance; transverse magnetic polarized light; tunable optical filter; visible region; Dielectrics; Filling; Gold; Gratings; Optical filters; Plasmons; Numerical analysis; optical filters; plasmonic sensors; subwavelength gratings;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2014.2346541

Filename

6874482