Open AccessSensing analysis based on plasmon induced transparency in nanocavity-coupled waveguide
Author(s) -
Shiping Zhan,
Hongjian Li,
Zhihui He,
Boxun Li,
Zhiquan Chen,
Hui Xu
Publication year - 2015
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.23.020313
Subject(s) - plasmon , nanosensor , refractive index , coupled mode theory , optics , materials science , surface plasmon resonance , electromagnetically induced transparency , dielectric , optoelectronics , transparency (behavior) , waveguide , coupling (piping) , optical sensing , finite difference time domain method , surface plasmon , surface plasmon polariton , physics , nanotechnology , nanoparticle , computer science , computer security , metallurgy
We report the sensing characteristic based on plasmon induced transparency in nanocavity-coupled metal-dielectric-metal waveguide analytically and numerically. A simple model for the sensing nature is first presented by the coupled mode theory. We show that the coupling strength and the resonance detuning play important roles in optimizing the sensing performance and the detection limit of sensor, and an interesting double-peak sensing is also obtained in such plasmonic sensor. In addition, the specific refractive index width of the dielectric environment is discovered in slow-light sensing and the relevant sensitivity can be enhanced. The proposed model and findings provide guidance for fundamental research of the integrated plasmonic nanosensor applications and designs.