Analysis of Phase Interrogated SPR Fiber Optic Sensors With Bimetallic Layers

作者：Moayyed Hamed^*; Leite Ivo Teixeira; Coelho Luis; Santos Jose Luis; Viegas Diana

来源：IEEE Sensors Journal, 2014, 14(10): 3662-3668.

DOI：10.1109/JSEN.2014.2329918

• Surface plasmon resonance
• fiber-optic sensors
• tapered optical fibers
• phase interrogation
• bimetallic combination

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.

• 出版日期2014-10