Open AccessLight transmission through a high index dielectric-filled sub-wavelength hole in a metal film
Author(s) -
Juuso Olkkonen,
Kari Kataja,
Dennis G. Howe
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.006980
Subject(s) - optics , dielectric , materials science , wavelength , refractive index , fabry–pérot interferometer , transmission coefficient , extraordinary optical transmission , transmission (telecommunications) , resonance (particle physics) , optoelectronics , physics , surface plasmon , surface plasmon polariton , telecommunications , plasmon , atomic physics , computer science
We investigate transmission of a normally incident, linearly polarized plane wave through a circular sub-wavelength hole in a metal film filled by a high index dielectric medium. We demonstrate for the first time that the trans-mission efficiency of such holes exhibits a Fabry-Pérot like behaviour versus thickness of the metal film, similar to that exhibited by sub-wavelength slits in metal films illuminated by TM-polarized plane waves. We show that by reducing the imaginary part of the propagation constant of the hybrid HE11 mode and by fortifying the Fabry-Pérot resonance, the high index dielectric filling can greatly enhance light transmission through a circular sub-wavelength hole.