Abstract
Backward and forward scattering of surface plasmonic wave interactions from gold nanobumps on the surface of a 30-nm gold thin film demonstrate three-dimensional (3-D) focusing and diverging properties. Fan-shaped forward scattering of an individual nanobump is observed. A quarter-circle structure composed of nanobumps is exploited to manipulate scattering from each nanobump. Experimental results show that 3-D propagation vectors generated by the gold nanobumps with their heights of 16 nm can deflect the surface plasmonic waves to produce 3-D focusing at 3. 6 ?m above the surface of the gold film. We clearly demonstrate that 3-D forward and backward focusing from gold nanobumps are with different amplitudes and directions of the vertical propagation vectors. © 2012 Springer Science+Business Media, LLC.
| Original language | English |
|---|---|
| Pages (from-to) | 563-569 |
| Number of pages | 7 |
| Journal | Plasmonics |
| Volume | 7 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Sept 2012 |
| Externally published | Yes |
Keywords
- Focusing
- Nanostructures
- Optics at surfaces
- Scattering light
- Surface plasmons
ASJC Scopus subject areas
- Biotechnology
- Biophysics
- Biochemistry