Dielectric stripes on gold as surface plasmon waveguides
Abstract
We report on surface plasmon polariton (SPP) waveguiding by SiO2 stripes on gold thin films. Compared to other SPP waveguide schemes, these systems provide relatively large effective refractive indices which can be described by the effective index method. By leakage radiation and near-field optical microscopy, we observe directly multimode and monomode behavior in straight SPP waveguides of different widths. Furthermore, we demonstrate waveguide bends and cross-talk free propagation across waveguide crossings.
- Publication:
-
Applied Physics Letters
- Pub Date:
- February 2006
- DOI:
- 10.1063/1.2180448
- Bibcode:
- 2006ApPhL..88i4104S
- Keywords:
-
- 42.82.Et;
- 42.79.Gn;
- 73.20.Mf;
- 78.68.+m;
- 71.36.+c;
- 78.20.Ci;
- Waveguides couplers and arrays;
- Optical waveguides and couplers;
- Collective excitations;
- Optical properties of surfaces;
- Polaritons;
- Optical constants