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Negative Refractive Index Metasurfaces for Enhanced Biosensing.

Zoran Jakšić1, Slobodan Vuković2, Jovan Matovic3

  • 1Center of Microelectronic Technologies and Single Crystals (CMTM), Institute of Chemistry, Technology and Metallurgy (IHTM), University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia. jaksa@nanosys.ihtm.bg.ac.rs.

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This summary is machine-generated.

Metasurfaces with negative refractive index show promise for advanced biosensors. Their electromagnetic properties can be tuned for enhanced surface plasmon polariton guiding, enabling sensitive detection of biological and chemical analytes.

Keywords:
artificial nanomembranesbiosensorschemical sensorslong range surface plasmons polaritonsoptical metamaterialsplasmonics

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Area of Science:

  • * Plasmonics and Nanophotonics
  • * Sensor Technology
  • * Materials Science

Background:

  • * Metasurfaces offer tunable electromagnetic properties.
  • * Surface plasmon polaritons (SPPs) are sensitive to surface changes.
  • * Existing biosensors face limitations in sensitivity and selectivity.

Purpose of the Study:

  • * To review metasurfaces as scaffolds for next-generation SPP-based sensors.
  • * To explore how metasurface properties can be tuned for sensing applications.
  • * To discuss multifunctionalization and performance limitations.

Main Methods:

  • * Analysis of freestanding plasmonic slabs.
  • * Investigation of ultrathin, multilayered structures.
  • * Examination of 2D "wallpaper" metasurfaces (e.g., split ring resonators, fishnet structures).

Main Results:

  • * Metasurfaces with negative effective refractive index can act as effective plasmonic guides.
  • * Analyte immersion or adsorption significantly alters metasurface electromagnetic properties.
  • * Multifunctionalization enables simultaneous sensing and selectivity enhancement.
  • * Intrinsic electromagnetic noise phenomena limit ultimate sensor performance.

Conclusions:

  • * Metasurfaces are promising platforms for highly sensitive and selective biosensing.
  • * Careful design of metasurface geometry and composition is crucial for optimal sensor performance.
  • * Understanding noise phenomena is essential for advancing metasurface sensor technology.