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Highly sensitive short-range mode resonance sensor with multilayer structured hyperbolic metamaterials.

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    Hyperbolic metamaterial (HMM) sensors offer enhanced performance over traditional methods. This study details a novel HMM refractive index sensor with high sensitivity and tunable resonance for biochemical detection.

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    Area of Science:

    • Materials Science
    • Nanotechnology
    • Optics

    Background:

    • Hyperbolic metamaterials (HMMs) exhibit unique electromagnetic properties.
    • Conventional surface plasmon resonance (SPR) sensors have limitations in sensitivity and performance.
    • HMMs offer potential for superior sensing capabilities.

    Purpose of the Study:

    • To characterize HMM dielectric properties using the operator approach to effective medium approximation (OEMA).
    • To design and analyze a high-sensitivity refractive index sensor based on near-infrared short-range (SR) mode resonance in HMMs.
    • To investigate the tunability and flexibility of SR mode resonance for sensing applications.

    Main Methods:

    • Utilized the operator approach to effective medium approximation (OEMA) for HMM characterization.
    • Derived dispersion relations for SR modes in metal-dielectric multilayer structures.
    • Simulated the performance of a designed HMM sensor, analyzing the effects of structural parameters (number of periods, cell thickness, metal fill rate, incidence angle).

    Main Results:

    • Achieved a maximum sensitivity of 330 µm/RIU in the near-infrared band.
    • Obtained a quality factor of 492 RIU⁻¹ for the designed sensor.
    • Demonstrated the flexibility and tunability of the SR mode resonance wavelength.

    Conclusions:

    • HMM-based SR mode resonance sensors provide superior performance compared to conventional sensors.
    • The designed HMM sensor shows significant potential for high-sensitivity biochemical detection.
    • Further research into HMM SR modes can lead to advanced sensing technologies.