期刊
OPTICS EXPRESS
卷 22, 期 7, 页码 7669-7677出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.007669
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资金
- National Natural Science Foundation of China [61275201]
- Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-10-0261]
- Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), P. R. China
- Fundamental Research Funds for the Central Universities of Ministry of Education of China [2011RC0402]
- Research Fund for the Doctoral Program of Higher Education of China [20100005110013]
- Opened Fund of the State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences
A surface plasmon polaritons (SPPs) refractive index sensor which consists of two metal-insulator-metal (MIM) waveguides coupled to each other by a ring resonator is proposed. The transmission properties are numerically simulated by finite element method. The sensing characteristics of such structure are systematically analyzed by investigating the transmission spectrum. The results indicate that there exist three resonance peaks in the transmission spectrum, and all of which have a linear relationship with the refractive index of the material under sensing. Through the optimization of structural parameters, we achieve a theoretical value of the refractive index sensitivity as high as 3460nmRIU(-1). Furthermore, this structure can also be used as a temperature sensor with temperature sensitivity of 1.36nm/degrees C. This work paves the way toward sensitive nanometer scale refractive index sensor and temperature sensor for design and application. (C) 2014 Optical Society of America
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