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Related Experiment Video

Updated: Nov 22, 2025

Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy
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Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy

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Plasmonic modes in cylindrical nanoparticles and dimers.

Charles A Downing1,2, Guillaume Weick3

  • 1Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.

Proceedings. Mathematical, Physical, and Engineering Sciences
|January 7, 2021
PubMed
Summary

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We derived analytical expressions for plasmon resonance frequencies in cylindrical nanoparticles. This model captures nanodisk and nanowire physics, including quantum spill-out effects and plasmon coupling in dimers.

Area of Science:

  • Physics
  • Materials Science
  • Nanotechnology

Background:

  • Localized surface plasmons (LSPs) in metallic nanoparticles exhibit unique optical properties.
  • Understanding plasmonic modes in different geometries is crucial for nanophotonic applications.

Purpose of the Study:

  • To develop an analytical model for plasmon resonance frequencies in cylindrical nanoparticles.
  • To investigate quantum mechanical corrections and plasmon coupling in nanoparticle dimers.

Main Methods:

  • Quasi-static approximation for plasmonic modes in metallic cylinders.
  • Analytical derivation of resonance frequencies for various aspect ratios.
  • Modeling of coupled plasmonic excitations in cylindrical dimers.

Main Results:

Keywords:
dimersnanoparticlesnanoplasmonicsquantum-size effects

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Last Updated: Nov 22, 2025

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  • Analytical expressions for longitudinal and transversal dipolar modes.
  • Inclusion of quantum spill-out effect corrections for nanometric cylinders.
  • Description of collective bright and dark modes in dimers and their frequency evolution.

Conclusions:

  • The developed model accurately describes plasmonics in cylinders, nanodisks, and nanowires.
  • Quantum effects and interparticle coupling significantly influence plasmon frequencies.
  • The findings provide a theoretical basis for experimental detection and design of plasmonic devices.