Surface plasmon resonance biosensor-based dual-core photonic crystal fiber: design and analysis

A finite element analysis of biosensor-based dual-core photonic crystal fiber is conducted using surface plasmon resonance model and is presented in this article. Calculated wavelength sensitivity of the sensor is around 10,000 nm/RIU and 5000 nm/RIU for x -polarization and y -polarization, respectively, when analyte refractive index is 1.34. Amplitude sensitivity for x -polarization and y -polarization is 334 RIU −1 and 394 RIU−1, respectively. Resolution for both polarizations is 2 × 10 –5 RIU. Consequently, the proposed biosensor can detect the low-refractive-index biochemical analyte at different wavelengths.