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Waveguiding through a two-dimensional metallic photonic crystal
F I Baida1, D Van Labeke, Y Pagani
1Laboratoire d'Optique P.M. Duffieux, CNRS UMR 6603, Institut de Microtechniques de Franche-Comté FR0067, Université de Franche-Comté, 25030 Besançon Cedex, France. fbaida@univ-fcomte.fr
Journal of Microscopy
|January 21, 2004
Summary
This study simulates light propagation in metallic photonic crystals using finite-difference time domain (FDTD) methods. Light confinement in channels and bent defects depends on input/output orientations, impacting surface plasmon behavior.
Area of Science:
- Condensed Matter Physics
- Nanophotonics
- Computational Electromagnetics
Background:
- Metallic photonic crystals offer unique light manipulation properties due to surface plasmon resonances.
- Previous experiments demonstrated surface plasmon scattering by periodic metallic nanostructures.
- Understanding light propagation in engineered channels is crucial for plasmonic devices.
Purpose of the Study:
- To simulate and analyze light propagation in linear and bent channels within a 2D metallic photonic crystal.
- To investigate the influence of channel width and defect orientation on light confinement.
- To perform spectral analysis of light behavior at different wavelengths.
Main Methods:
- Two-dimensional (2D) finite-difference time domain (FDTD) simulations.
- Modeling of surface plasmon scattering by periodic gold nanodots (400-nm period triangular lattice).
- Simulation of light injection and propagation through channels of varying widths and a 90-degree bent line defect.
Main Results:
- Demonstrated light propagation through linear channels of different widths.
- Observed light behavior in a 90-degree bent line defect.
- Showed that light confinement is dependent on the orientation (Gamma-M and Gamma-K) of input/output line defects.
Conclusions:
- The orientation of line defects significantly impacts light confinement in metallic photonic crystal channels.
- FDTD simulations provide valuable insights into plasmonic waveguiding in nanostructured materials.
- Results are relevant for the design of plasmonic circuits and optical components.