期刊
JOURNAL OF MODERN OPTICS
卷 63, 期 8, 页码 793-797出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500340.2015.1102345
关键词
surface plasmon resonance; photonic crystal fiber; sensor; finite element method
类别
资金
- National Basic Research Program of China [2010CB327801]
- National Natural Science Foundation of China [61201101, 61205003]
A surface plasmon resonance biosensor based on large size square-lattice photonic crystal fiber has been designed and simulated by finite element method. The square-lattice airholes are first coated with a calcium fluoride layer to provide mode confinement, then a nanoscale gold layer is deposited to excite the plasmon mode, and finally, the sample is infiltrated into the holes. The numerical results reveal that the resonance properties are easily affected by many parameters. The refractive index resolution of corresponding sensor can reach 4.3 x 10(-6) RIU when the optimum parameters are set as the radius of curvature of the airhole r = 2 mu m, the thickness of the core struts c = 200 nm, the auxiliary dielectric layer s = 1 mu m, and the gold film d = 40 nm. In addition, the effective area and nonlinear coefficient are calculated.
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