期刊
IEEE SENSORS JOURNAL
卷 14, 期 10, 页码 3662-3668出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2014.2329918
关键词
Surface plasmon resonance; fiber-optic sensors; tapered optical fibers; phase interrogation; bimetallic combination
资金
- Fundacao para a Ciwncia e a Tecnologia (FCT), Portuguese Foundation for Science and Technology [PTDC/FIS/119027/2010]
- European Regional Development Fund through the Compete Programme
- FCT [FCOMP-01-0124-FEDER-022701, SFRH/BD/78149/2011]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/78149/2011, PTDC/FIS/119027/2010] Funding Source: FCT
An effective analytical model combining geometrical optics with the transfer-matrix theory for stratified optical media is applied to investigate the sensing properties of tapered optical fiber surface plasmon resonance (SPR) sensors incorporating Ag-Au bimetallic layers, particularly in the context of phase interrogation. The performance of the sensing structures is studied as a function of the tapering parameters and thickness of the metallic layers. It is shown that the Ag-Au bimetallic combination is capable of improving the resolution and tuning working region of SPR fiber-optic sensors and that by tapering the sensing structures enhanced sensitivity can be achieved when phase interrogation is considered.
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