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This work presents a refractive index-based plasmonic sensor with a high figure of merit (FOM) by utilizing SrTiO3 (STO) as a dielectric layer and Fluorinated Graphene as a 2D nanomaterial. The proposed sensor is designed using the Kretschmann configuration under angle interrogation in the near-infrared region at a wavelength of 1550 nm. The geometrical parameters of the proposed sensor are engineered using the Transfer Matrix Method. The proposed work also studies the effect of the number of layers of different 2D nanomaterials in the engineered plasmonic structure. Finally, a three-layer heterostructure (Aluminum-STO-Fluorinated Graphene) based plasmonic sensor is proposed with a sensitivity of 174°/RIU and FOM value of 809.30 RIU−1, which is almost 20 times higher than the current state-of-the-art plasmonic sensors.

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A Refractive Index-Based Plasmonic Sensor with Enhanced Figure of Merit Using Titanate Material in a Three-Layer Heterostructure

  • 会议论文

  • 发表日期：

    2025年

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  • R. Runthala,
  • K. Srivastava,
  • A. Shetty,
  • P. Arora

摘要

This work presents a refractive index-based plasmonic sensor with a high figure of merit (FOM) by utilizing SrTiO3 (STO) as a dielectric layer and Fluorinated Graphene as a 2D nanomaterial. The proposed sensor is designed using the Kretschmann configuration under angle interrogation in the near-infrared region at a wavelength of 1550 nm. The geometrical parameters of the proposed sensor are engineered using the Transfer Matrix Method. The proposed work also studies the effect of the number of layers of different 2D nanomaterials in the engineered plasmonic structure. Finally, a three-layer heterostructure (Aluminum-STO-Fluorinated Graphene) based plasmonic sensor is proposed with a sensitivity of 174°/RIU and FOM value of 809.30 RIU−1, which is almost 20 times higher than the current state-of-the-art plasmonic sensors.