Title :
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
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;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2346541
