Journal
PLASMONICS
Volume 12, Issue 3, Pages 583-588Publisher
SPRINGER
DOI: 10.1007/s11468-016-0301-7
Keywords
Surface plasmon resonance; Surface plasmon polariton; Photonic crystal fiber; Fiber optics sensors
Funding
- Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)
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A surface plasmon resonance (SPR) sensor based on D-shaped photonic crystal fiber (PCF) coated with indium tin oxide (ITO) film is proposed and numerically investigated. Thanks to the adjustable complex refractive index of ITO, the sensor can be operated in the near-infrared (NIR) region. The wavelength sensitivity, amplitude sensitivity, and phase sensitivity are investigated with different fiber structure parameters. Simulation results show that similar to 6000 nm/refractive index unit (RIU), similar to 148/RIU, and similar to 1.2 x 10(6) deg/RIU/cm sensitivity can be achieved for wavelength interrogation, amplitude interrogation, and phase interrogation, respectively, when the environment refractive index varies between 1.30 and 1.31. It is noted that the wavelength sensitivity and phase sensitivity are more pronounced with larger refractive index. The proposed SPR sensor can be used in various applications, including medicine, environment, and large-scale targets detection.
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