Near-field imaging of surface-plasmon vortex-modes around a single elliptical nanohole in a gold film
Abstract We present scanning near-field images of surface plasmon modes around a single elliptical nanohole in 88 nm thick Au film. We find that rotating surface plasmon vortex modes carrying extrinsic orbital angular momentum can be induced under linearly polarized illumination. The vortex modes ar...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2019-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-019-41781-2 |