Open AccessDesign and properties of dielectric surface plasmon Bragg mirrors
Author(s) -
Sukanya Randhawa,
Marı́a Ujué González,
Jan Renger,
Stefan Enoch,
Romain Quidant
Publication year - 2010
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.18.014496
Subject(s) - optics , materials science , surface plasmon , surface plasmon polariton , dielectric , grating , plasmon , wavelength , fiber bragg grating , refractive index , optoelectronics , physics
The ability of gratings made of dielectric ridges placed on top of flat metal layers to open gaps in the dispersion relation of surface plasmon polaritons (SPPs) is studied, both experimentally and theoretically. The gap position can be approximately predicted by the same relation as for standard optical Bragg stacks. The properties of the gap as a function of the grating parameters is numerically analyzed by using the Fourier modal method, and the presence of the gap is experimentally confirmed by leakage radiation microscopy. We also explore the performance of these dielectric gratings as SPP Bragg mirrors. The results show very good reflecting properties of these mirrors for a propagating SPP whose wavelength is inside the gap.