Ultimate capabilities of sharp metal tips for plasmon nanofocusing, near-field trapping and sensing |
| |
Authors: | Dmitri K. Gramotnev Michael W. Vogel |
| |
Affiliation: | a Nanophotonics Pty Ltd, GPO Box 786, Albany Creek, QLD 4035, Australia b Institute of Technology and Innovation, University of Southern Denmark, Niels Bohrs Alle 1, DK 5230, Odense M, Denmark |
| |
Abstract: | This Letter considers an ‘ultimate’ nanofocusing system with arguably the largest field enhancements achievable in plasmonic nanofocusing structures. These enhancements appear far beyond those required for single molecule detection. The proposed structure is demonstrated to be ∼4 orders of magnitude more efficient for trapping of small nanoparticles and single molecules, than the tip-assisted trapping. It does not require direct irradiation of the tip, and this will enable highly targeted delivery of the optical energy to nanoscale regions as small as a few nanometers (e.g., inside living cells) for trapping, imaging, localized heat discharge, and superior sensing in a new generation of nano-optical detectors. |
| |
Keywords: | Surface plasmons Nanofocusing Local field enhancement Near-field trapping Near-field optics |
本文献已被 ScienceDirect 等数据库收录! |
|