10.57647/j.ijnd.2025.1603.19

IR gold-coated circular photonic crystal fiber surface plasmon resonance (C-PCF-SPR) sensor

  1. Department of Electrical Engineering, No.C., Islamic Azad University, Noor, Iran
  2. Department of Electrical Engineering, Faculty of Engineering and Technology, University of Mazandaran, Babolsar, Iran
IR Gold-Coated Circular Photonic Crystal Fiber Surface Plasmon Resonance (C-PCF-SPR) Sensor

Received: 2024-09-29

Revised: 2024-12-17

Accepted: 2024-12-18

Published in Issue 2025-06-01

How to Cite

Mirasanloo Zeydi, M., Ghoreishi Amiri, S. S., Yousefi, R., & Aderang, H. (2025). IR gold-coated circular photonic crystal fiber surface plasmon resonance (C-PCF-SPR) sensor. International Journal of Nano Dimension, 16(3 (July 2025). https://doi.org/10.57647/j.ijnd.2025.1603.19

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Abstract

Wavelength and amplitude sensitivities are crucial aspects in optimizing the performance of photonic crystal fiber sensors. This study presents a novel approach to enhance sensitivity by designing a circular photonic crystal fiber-based surface plasmon resonance (C-PCF-SPR) sensor. The proposed sensor is characterized by three central air holes and a thin gold coating serving as the plasmonic medium, allowing it to achieve resonance wavelengths in the infrared range (3000 to 3300 nm). The sensor's propagation characteristics were evaluated using the finite difference eigenmode solver method via Lumerical software. Within a refractive index (RI) interval of 1.34 to 1.38, the sensor demonstrated a maximum wavelength sensitivity of 18681 nm/RIU and an amplitude sensitivity of 942.47 RIU⁻¹. The sensor’s resolution reaches up to 1 × 10⁻⁴ RIU, with a figure of merit (FOM) calculated to be 311.35 RIU⁻¹ in the same RI range. Given its structural similarity to conventional PCFs, the sensor is expected to be highly feasible for real-world applications. Furthermore, numerical analysis suggests that the sensor can effectively detect various blood components, including plasma, white blood cells (WBCs), hemoglobin (Hb), ethanol, and captone, as well as distinguish between healthy and cancerous cells, with an optimal gold layer thickness of 0.1 µm.

Keywords

  • Plasmonic,
  • Sensor,
  • Single Mode Fiber (SMF),
  • Signal-to-Noise Ratio (SNR),
  • Refractive Index (RI)

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