期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 132, 期 1, 页码 26-33出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.01.003
关键词
surface plasmon resonance; optical fiber sensor; gold film; thickness
For a multimode-optical-fiber surface plasmon resonance (SPR) sensor with a gold film supporting surface plasmon waves (SPWs), we have investigated the effects of gold thickness on sensor performance experimentally to find the optimal thickness when a white-light source is used. It is found that the sensor with a thickness of around 65 rim enables most precise measurement of a resonance wavelength and gives relatively high sensitivity, which is 1557 nm/RIU in the refractive index range of 1.333-1.3469. Also, we have confirmed that a simulation model based on meridional rays cannot explain the minimum reflectance of SPR spectra for values below 0.5. (C) 2008 Elsevier B.V. All rights reserved.
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