Affiliation:
1. Zhuhai Fengyang Technology Co., LTD.
2. Guilin University of Electronic Technology
3. Guangxi Academy of Sciences
Abstract
A surface plasmon resonance (SPR) sensor based on D-shaped hollow microstructured fiber with Au/ITO bimetallic film is proposed. The employment of bimetallic films improves the adhesion between optical films and fiber surfaces and further enhances the coupling effect of SPR. The effects of various structural parameters (e.g., sizes of air holes in the core and metallic film thickness) on the sensor performances are investigated with the finite element method. The maximum wavelength sensitivity of 9900 nm/RIU (RIU: refractive index unit) in the refractive index (RI) range of 1.30–1.39 is achieved, corresponding to a resolution of 1.01×10−5RIU−1. The proposed SPR sensor also exhibits a maximum amplitude sensitivity of 425.58RIU−1. These results demonstrate that the proposed D-shaped hollow microstructured fiber with the bimetallic film is a promising structure for refractive index sensing and may help design susceptible SPR fiber sensors.
Funder
Key R&D Projects of the Ministry of Science and Technology
Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronic Technology
Guangxi Key Laboratory of Manufacturing System Advanced Manufacturing Technology
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics