Share Email Print
cover

Journal of Nanophotonics

Theoretical investigation of a plasmonic sensor based on a metal–insulator–metal waveguide with a side-coupled nanodisk resonator
Author(s): Yiyuan Xie; Yexiong Huang; Hongjun Che; Weilun Zhao; Weihua Xu; Xin Li; Jiachao Li
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

A plasmonic sensor based on a metal–insulator–metal waveguide with a side-coupled nanodisk resonator is proposed and numerically investigated using a finite-difference time-domain method. The numerical simulation results indicate that more than one sharp resonance dip appears in the transmission spectrum in the telecommunication regime, and each resonance wavelength has a linear relationship with the refractive index of the dielectric in the resonator. In addition, the sensing characteristics of the structure and the influence of its structural parameters are analyzed in detail by investigating the transmission spectra. As a refractive-index sensor, its sensitivity can reach as high as 1150 nm per refractive index unit near the resonance wavelength of 1550 nm, and its sensing resolution can reach 106 for a wavelength resolution of 0.01 nm. Furthermore, by employing the relationship between the temperature and the refractive index, the temperature-sensing characteristics of the structure are also discussed. Near the resonance wavelength of 1550 nm, the temperature sensitivity can reach 0.45  nm/°C. The sensor has a compact and simple structure and may find many potential and important applications in optical networks-on-chip and on-chip nanosensors.

Paper Details

Date Published: 13 January 2015
PDF: 13 pages
J. Nanophoton. 9(1) 093099 doi: 10.1117/1.JNP.9.093099
Published in: Journal of Nanophotonics Volume 9, Issue 1
Show Author Affiliations
Yiyuan Xie, Southwest Univ. (China)
Yexiong Huang, Southwest Univ. (China)
Hongjun Che, Southwest Univ. (China)
Weilun Zhao, Southwest Univ. (China)
Weihua Xu, Southwest Univ. (China)
Xin Li, Southwest Univ. (China)
Jiachao Li, Southwest Univ. (China)


© SPIE. Terms of Use
Back to Top