Dan HAO, Jian-shuai WANG, Yu-heng XIE, Ke ZHU, Zhuang-zhuang XUE. Surface Plasmon Resonance Sensor Based on Dual-core Photonic Crystal Fiber for Low Refractive Index Detection in Mid-infrared Spectrum[J]. Acta Photonica Sinica, 2020, 49(6): 0628001
- Acta Photonica Sinica
- Vol. 49, Issue 6, 0628001 (2020)
Fig. 1. Cross section of the double-core PCF-SPR sensor
Fig. 2. Dispersion relation and optical field distribution of core mode, SPP mode, and loss spectra of the sensor
Fig. 3. Loss spectra and optical field distribution of core mode for different radii of the central hole r 0
Fig. 4. Re[n eff] and resonance wavelength of the core mode at the phase matching under different central air hole
Fig. 5. Influence of loss spectra of core mode for different radii of small air holes, different radii of large air holes and different pitch
Fig. 6. Loss spectra of core mode for different gold thickness
Fig. 7. Loss spectra of core mode for different polished depth
Fig. 8. Loss spectra of the sensor for different external RI
Fig. 9. The resonance wavelength variations with analyte RI
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Table 1. Performance comparison of the proposed sensor with reported PCF-SPR sensors
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