Volume 19, Issue 3 (3-2023)
lmj 2023, 19(3): 27-33 |
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Bagheri Khatibani A. Physical modeling of a refractive index photonic crystal fiber based
on surface plasmon resonance. lmj 2023; 19 (3) :27-33
URL: http://icml.ir/article-1-577-en.html
URL: http://icml.ir/article-1-577-en.html
Nano Research Lab, Lahijan Branch, Islamic Azad University, Lahijan, Iran
Abstract: (1136 Views)
Photonic crystal fiber (PCF) sensors based on surface plasmon resonance have shown their unique abilities in biological imaging, medical diagnostics, environmental monitoring, non-destructive disease diagnosis, etc. By effectively limiting the electromagnetic field in the fiber core and strong resonance of the surface plasmon-polariton, the evanescent field at the boundary between the plasmonic metal and the analyte is amplified and emits a significant pulse, which greatly increases the efficiency and accuracy of this type of sensor. Various forms of this kind of sensors have been designed so far. However, there are still challenges in how to design the metal-analyte interface. To solve this problem, the geometry of the fiber can be modified to effectively strengthen the evanescent field at the metal-analyte interface. In this study, a new structure is introduced for the aforementioned sensor, which shows a high sensitivity to changes in the refractive index of biological analytes.
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