Plasmon Scattering from Single Subwavelength Holes
Open Access
- 21 March 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 108 (12), 127402
- https://doi.org/10.1103/physrevlett.108.127402
Abstract
We map the complex electric fields associated with the scattering of surface plasmon polaritons by single subwavelength holes of different sizes in thick gold films. We identify and quantify the different modes associated with this event, including a radial surface wave with an angularly isotropic amplitude. This wave is shown to arise from the out-of-plane electric dipole induced in the hole, and we quantify the corresponding polarizability, which is in excellent agreement with electromagnetic theory. Time-resolved measurements reveal a time delay of between the surface plasmon polariton and the radial wave, which we attribute to the interaction with a broad hole resonance. DOI: http://dx.doi.org/10.1103/PhysRevLett.108.127402 © 2012 American Physical Society
Keywords
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