Related Experiment Video
Updated: May 31, 2026
09:00
Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
Dark and bright localized surface plasmons in nanocrosses.
Niels Verellen1, Pol Van Dorpe, Dries Vercruysse
1INPAC-Institute for Nanoscale Physics and Chemistry, K U Leuven, Leuven, Belgium. niels.verellen@fys.kuleuven.be
Optics Express
|July 1, 2011
Summary
This study explores metallic nanocrosses, revealing how symmetry controls plasmon resonances. These nanocrosses serve as building blocks for complex plasmonic structures with tunable optical properties.
Area of Science:
- Plasmonics
- Nanophotonics
- Metamaterials
Background:
- Localized surface plasmon resonances (LSPRs) are crucial for nanoscale light manipulation.
- Metallic nanostructures offer tunable optical properties through geometry.
- Understanding plasmon coupling and resonance modes is key for advanced optical applications.
Purpose of the Study:
- Investigate plasmon resonances in metallic nanocross geometries.
- Explore spectral tunability by altering nanocross dimensions and symmetry.
- Examine the influence of symmetry on plasmon coupling and resonance behavior.
Main Methods:
- Fabrication and characterization of metallic nanocross structures.
- Systematic variation of nanocross arm length, angle, and symmetry.
- Finite-difference time-domain (FDTD) simulations for optical properties and charge distributions.
- Experimental spectroscopy to validate simulation results.
Main Results:
- Achieved spectral tunability of dipole and higher-order LSPRs by modifying nanocross geometry.
- Demonstrated that symmetry significantly impacts plasmon coupling and observed dipole, quadrupole, octupole, and Fano resonances.
- Utilized nanocrosses as building blocks for coupled plasmonic dimers and trimers, exhibiting hybridized modes and Fano interferences.
Conclusions:
- Nanocross geometry provides a versatile platform for controlling plasmonic behavior.
- Symmetry engineering is a powerful tool for tuning optical responses in nanostructures.
- The findings enable the design of complex plasmonic systems for diverse photonic applications.
