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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Angle-resolved transmission measurements through anisotropic two-dimensional plasmonic crystals
Cyrille Billaudeau1, Stéphane Collin, Christophe Sauvan
1Laboratoire de Photonique et de Nanostructures LPN-CNRS, Route de Nozay, 91460 Marcoussis, France.
Optics Letters
|January 17, 2008
Summary
We measured surface plasmon polaritons in 2D gold crystals with nanoscale holes. Crystal anisotropy separates plasmonic modes, revealing their unique dispersion and symmetry properties.
Area of Science:
- Condensed matter physics
- Nanophotonics
- Plasmonics
Background:
- Anisotropic 2D materials offer unique optical properties.
- Surface plasmon polaritons (SPPs) are crucial for nanoscale light manipulation.
Purpose of the Study:
- To investigate the dispersion relations of SPPs in anisotropic 2D plasmonic crystals.
- To analyze the effect of crystal anisotropy on SPP mode propagation.
Main Methods:
- High-accuracy angle-resolved optical transmission measurements.
- Fabrication of gold films with large-area rectangular arrays of nanoscale square holes on GaAs substrates.
Main Results:
- Revealed dispersion relations for air-gold and gold-GaAs SPPs.
- Observed separation of plasmonic modes due to crystal anisotropy.
- Characterized the symmetry and dispersion properties of the anisotropic modes.
Conclusions:
- Anisotropic 2D plasmonic crystals exhibit directional separation of SPP modes.
- The study provides insights into controlling light at the nanoscale using plasmonic metamaterials.
