Research Papers

Theoretical investigation of a plasmonic sensor based on a metal–insulator–metal waveguide with a side-coupled nanodisk resonator

[+] Author Affiliations
Yiyuan Xie

Southwest University, College of Electronic and Information Engineering, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715, China

Yexiong Huang

Southwest University, College of Electronic and Information Engineering, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715, China

Hongjun Che

Southwest University, College of Electronic and Information Engineering, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715, China

Weilun Zhao

Southwest University, College of Electronic and Information Engineering, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715, China

Weihua Xu

Southwest University, College of Electronic and Information Engineering, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715, China

Xin Li

Southwest University, College of Electronic and Information Engineering, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715, China

Jiachao Li

Southwest University, College of Electronic and Information Engineering, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715, China

J. Nanophoton. 9(1), 093099 (Jan 13, 2015). doi:10.1117/1.JNP.9.093099
History: Received November 17, 2014; Accepted December 18, 2014
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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 0.45nm/°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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Yiyuan Xie ; Yexiong Huang ; Hongjun Che ; Weilun Zhao ; Weihua Xu, et al.
"Theoretical investigation of a plasmonic sensor based on a metal–insulator–metal waveguide with a side-coupled nanodisk resonator", J. Nanophoton. 9(1), 093099 (Jan 13, 2015). ; http://dx.doi.org/10.1117/1.JNP.9.093099


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