Related Experiment Video
Updated: Apr 30, 2026
15:06
Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
Published on: January 3, 2016
12.4K
A generalized non-local optical response theory for plasmonic nanostructures.
N A Mortensen1, S Raza2, M Wubs1
11] Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark [2] Center for Nanostructured Graphene (CNG), Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
Nature Communications
|May 3, 2014
Summary
A new theory explains plasmonics in metallic nanoparticles by unifying quantum pressure and charge diffusion. This classical broadening mechanism dominates over quantum tunneling, impacting nanoparticle behavior.
Area of Science:
- * Physics and Materials Science
- * Nanotechnology and Plasmonics
Background:
- * Localized surface plasmon excitations in metallic nanostructures are key to their optical properties.
- * Understanding plasmonic phenomena at the atomic scale requires advanced theoretical models.
Purpose of the Study:
- * To present a simplified semiclassical theory for generalized non-local optical response.
- * To unify quantum pressure convection and induced charge diffusion effects.
Main Methods:
- * Development of a semiclassical generalized non-local optical response theory.
- * Introduction of a complex-valued generalized non-local optical response parameter.
Main Results:
- * The theory accurately predicts frequency shifts and size-dependent damping in individual nanoparticles.
- * It explains the broadening of plasmon regimes in nanoparticle dimers, outperforming quantum tunneling effects.
- * A classical broadening mechanism is identified as dominant.
Conclusions:
- * The proposed theory offers a robust explanation for plasmonic behavior across different scales.
- * It has potential applications in plasmonics for various conducting materials, including graphene.
