13 January 2015 Theoretical investigation of a plasmonic sensor based on a metal–insulator–metal waveguide with a side-coupled nanodisk resonator
Author Affiliations +
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.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yiyuan Xie, Yiyuan Xie, Yexiong Huang, Yexiong Huang, Hongjun Che, Hongjun Che, Weilun Zhao, Weilun Zhao, Weihua Xu, Weihua Xu, Xin Li, Xin Li, Jiachao Li, Jiachao Li, } "Theoretical investigation of a plasmonic sensor based on a metal–insulator–metal waveguide with a side-coupled nanodisk resonator," Journal of Nanophotonics 9(1), 093099 (13 January 2015). https://doi.org/10.1117/1.JNP.9.093099 . Submission:
JOURNAL ARTICLE
13 PAGES


SHARE
Back to Top