Adiabatic and Nonadiabatic Nanofucusing of Plasmons by Tapered Gap Plasmon Waveguides
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Description
Adiabatic and non-adiabatic nano-focusing of plasmons in tapered gap plasmon waveguides is analyzed using the finite-difference time-domain algorithm. Optimal adaptors between two different sub-wavelength waveguides and conditions for maximal local field enhancement are determined, investigated and explained on the basis of dissipative and reflective losses in the taper. Nano-focusing of plasmons into a gap of ~ 1 nm width with more than 20 times increase in the magnetic field intensity is demonstrated in a silver-vacuum taper of ~ 1 micron long. Comparison with the approximate theory based on the geometrical optics approximation is conducted.
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| ID Code: | 5238 |
|---|---|
| Item Type: | Contribution to Journal (Journal Article) |
| Refereed: | Yes |
| Measurements or Duration: | 3 pages |
| Keywords: | Gap Plasmon, Nanofocusing, Plasmon, Plasmonic, Subwavelength |
| DOI: | 10.1063/1.2236219 |
| ISSN: | 0003-6951 |
| Pure ID: | 33891180 |
| Divisions: | Past > QUT Faculties & Divisions > Faculty of Health Past > QUT Faculties & Divisions > Faculty of Science and Technology |
| Copyright Owner: | Copyright 2006 American Institute of Physics |
| Copyright Statement: | Reproduced in accordance with the copyright policy of the publisher. |
| Deposited On: | 16 Oct 2006 00:00 |
| Last Modified: | 03 Mar 2024 11:25 |
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