4.5 Article

Highly sensitive refractive index sensor based on SPR with silver and titanium dioxide coating

期刊

OPTICAL AND QUANTUM ELECTRONICS
卷 53, 期 6, 页码 -

出版社

SPRINGER
DOI: 10.1007/s11082-021-02981-1

关键词

Optical fiber sensor; Surface plasmon resonance; Refractive index sensor; Photonic crystal fiber

资金

  1. National Basic Research Program of China
  2. (973 Program) [2010CB327801]
  3. National Natural Science Foundation of China [10874128]
  4. Natural Science Foundation of Tianjin [18JCQNJC71200]

向作者/读者索取更多资源

The SPR sensor based on dual-layered air hole shaped photonic crystal fiber achieves high sensitivity simultaneous measurement of refractive index, with good sensing properties and the potential for real-time accurate measurement in biomedical, biological, and organic chemical domains.
A surface plasmon resonance (SPR) sensor based on dual-layered air hole shaped photonic crystal fiber (PCF) is proposed to realize the simultaneous measurement of refractive index (RI). The plasma materials silver (Ag) and titanium dioxide (TiO2) were sequentially coated on the outer surface of PCF to obtain enhanced sensing properties. By carefully adjusting the geometrical parameters, the simulation results show a maximum wavelength sensitivity of 72,000 nm/RIU for analyte refractive indices ranging from 1.26 to 1.365, which realizes the high-sensitivity sensing in the visible to near-infrared optical band. Moreover, the sensor attains a maximum figure of merit (FOM) of 229 and RI resolution of 1.29x10(-6). This work shows great potential for real-time, affordable, and accurate measurement in biomedical, biological and organic chemical domains.

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