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We study the sensing properties of an intensity-modulated fiber-optic surface plasmon resonance (SPR) sensor using radially polarized beam (RPB). Because of the rotational symmetry of fiber and RPB, surface plasmon can be excited more efficiently at the sensor surface, which results in an obvious improvement of the sensitivity. Our experiments demonstrate that the sensitivity in the case of RPB illumination is three times higher than that of linearlv polarized beam illumination. 相似文献
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Technical study of visible light wavelength division multiplexing using polymer optical fiber 总被引:3,自引:0,他引:3
Recently there has been considerable interest in the de-velopment of polymer optical fibers (POF). The ductil-ity of polymers is an important advantage and confers onPOF easy processing, easy handling, low costs, and largecore diameter[1]. POF has an extended applicability, suchas in computer networks, local area networks, data links,automobile, optical sensors, lighting, etc.. The large corediameter, up to 1 mm or more, enables high efficienciesof fiber coupling.We have demonstrated 100-M… 相似文献
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The effects of temperature on a surface plasmon studied experimentally and theoretically. SPR resonance (SPR) sensor in Kretschmann configuration are experiments are carried out over a temperature range of 278- 313 K in steps of 5 K. A detailed theoretical model is provided to analyze the variation of performance with varying temperature of the sensing environment. The temperature dependence of the properties of the metal, dielectric, and analyte are studied, respectively. The numerical results indicate that the predictions of the theoretical model are well consistent with the experiment data. 相似文献
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We theoretically analyse the temperature effects on a surface plasmon resonance (SPR) sensor in Kretschmann configuration. The temperature effects include the thermo-optic effect and the dispersion of thermal-optic coefficient in the dielectric along with the thermal expansion effect, phonon-electron scattering and electron-electron scattering in the metal layer. We simulate the temperature dependence of the resonance position and the sensitivity of the SPR sensor under wavelength-interrogation and angular-interrogation mode of operation and the differences are pointed out in the two modes. 相似文献
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A multimode fiber-optic surface plasmon resonance(SPR) sensor with a MgF2 film as a modulated layer is studied.The fiber-optic SPR sensor is investigated theoretically,specifically the influence of the dielectric protecting layer,using a four-layer model.The sensor is then fabricated with the optimal parameters suggested by the theoretical simulation.The sensor has a high sensitivity in the analyte refractive index(RI) range of 1.33-1.40.The best sensitivity of 4 464 nm/RIU is achieved in the experiment.The use of dielectric film(MgF2) can not only modulate the resonance wavelength of the sensor,but also protect the silver film from oxidation. 相似文献
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