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Plasmonic Sensor Based on Dielectric Nanoprisms.

Mahmoud H Elshorbagy1,2, Alexander Cuadrado3, Javier Alda1

  • 1Optics Department, University Complutense of Madrid, Faculty of Optics and Optometry, Av. Arcos de Jalón, 118., Madrid, 28037, Spain.

Nanoscale Research Letters
|November 5, 2017
PubMed
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A new periodic array of extruded nanoprisms generates surface plasmon resonances for enhanced sensing. This plasmonic sensor technology offers competitive sensitivity and figure of merit for detecting changes in dielectric media.

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Surface plasmon resonance (SPR) is a powerful phenomenon for sensing applications.
  • Traditional SPR sensors, like the Kretschmann configuration, have limitations in performance and application.
  • Developing novel nanostructures is crucial for advancing plasmonic sensing technologies.

Purpose of the Study:

  • To propose and analyze a novel periodic array of extruded nanoprisms for SPR-based sensing.
  • To investigate the guiding and funnelling of light by nanoprisms at the metal-dielectric interface.
  • To evaluate the sensing performance, including sensitivity and figure of merit, compared to existing technologies.

Main Methods:

  • Theoretical proposal of a periodic array of extruded nanoprisms.
Keywords:
BiosensorGuiding lightNano-prismOptical sensorPlasmonic sensor

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  • Simulation of light interaction with the nanostructure under normal incidence.
  • Spectral interrogation of the generated surface plasmon resonances.
  • Analysis of sensitivity and figure of merit for dielectric medium sensing.

    • Main Results:

    • The proposed nanoprism array effectively generates surface plasmon resonances.
    • The system demonstrates superior performance compared to classical Kretschmann configurations.
    • Achieved sensitivity and figure of merit values are competitive with current plasmonic sensor technologies.
    • Design considerations incorporate fabrication constraints for practical implementation.

    Conclusions:

    • The periodic array of extruded nanoprisms is a promising platform for SPR sensing.
    • This configuration offers advantages in performance and potential for miniaturization.
    • The developed sensor technology shows potential for various dielectric medium sensing applications.