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Author: search.filters.author.Arora, PankajSubject: search.filters.subject.Sensors

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    TiO2-FG-based plasmonic sensor with enhanced figure of merit for sensing applications: A numerical approach
    (Elsevier, 2025-09) Grover, Nitika; Arora, Pankaj
    A refractive index-based surface plasmon resonance sensor using a multilayer heterostructure in the Kretschmann configuration is proposed for the near-infrared region. In the proposed configuration, aluminum is used as a plasmonic metal, titanium dioxide is used as a dielectric layer, and a fluorinated graphene (FG) layer is used as a 2D nanomaterial to enhance the performance parameters. A thorough comparative study is conducted between popularly used titanium compounds: Titanium dioxide (TiO2) and Titanium disilicide (TiSi2). For the proposed SPR sensor, each layer is engineered and optimized on the grounds of linewidth, detection accuracy (DA), and Figure of Merit (FOM), which are the critical performance parameters. To this end, the geometrical parameters are calculated using the transfer matrix method and analyzed meticulously to find the optimum trade-off points. The proposed sensor is numerically tested efficiently to sense different concentrations of hemoglobin in human blood. For the angle interrogation technique at the wavelength of 1550 nm, the sensor provides an enhanced FOM of 462.8 RIU−1 and a DA of 4 degrees−1. Thus, the proposed design opens a broader window for bio-sensing applications because of the advantages TiO2 and FG layers offer in enhancing the sensing parameters.
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    Stain free colorimetric sensors using hybrid mode plasmonic microscopy
    (IEEE, 2016) Arora, Pankaj
    We present colorimetric stain free image based sensing of antibody-antigen binding and refractive index perturbation, using substrates that support hybrid mode surface plasmons and demonstrate their integration with microfluidic channels for real time index sensing.
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    Dispersion engineering with plasmonic nanostructures for enhanced surface plasmon resonance sensing
    (IEEE, 2018) Arora, Pankaj
    We experimentally demonstrate plasmonic resonance narrowing via dispersion engineering using plasmonic nanogratings placed on top of thin metal coated prism. The enhancement in Q factor, combined with strong field localization is attractive for sensing applications.