Nanofocusing on circularly distributed tapered metallic waveguides by means of plasmonic vortex lenses
| Autor: | Denis Garoli, Pierfrancesco Zilio, Filippo Romanato, Marta Carli, T. Ongarello |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry plasmonic nanofocusing Surface plasmon Physics::Optics plasmonic vortex lens Surface plasmon polaritons Surface plasmon polariton Atomic and Molecular Physics and Optics law.invention Vortex Lens (optics) OAM Optics Planar law Nanofocusing on circularly distributed tapered metallic waveguides by means of plasmonic vortex lenses Near-field scanning optical microscope Plasmonic lens Electrical and Electronic Engineering business Engineering (miscellaneous) Plasmon |
| Zdroj: | Applied optics (2004, Online) 54 (2015): 1161–1166. doi:10.1364/AO.54.001161 info:cnr-pdr/source/autori:Garoli D.; Ongarello T.; Zilio P.; Carli M.; Romanato F./titolo:Nanofocusing on circularly distributed tapered metallic waveguides by means of plasmonic vortex lenses/doi:10.1364%2FAO.54.001161/rivista:Applied optics (2004, Online)/anno:2015/pagina_da:1161/pagina_a:1166/intervallo_pagine:1161–1166/volume:54 |
| ISSN: | 1539-4522 |
| DOI: | 10.1364/AO.54.001161 |
| Popis: | We report our experimental results on the nanofocusing effect at the apex of planar nanotips placed at the center of a plasmonic vortex lens (PVL). PVLs are helical gratings that are able to generate surface plasmon polaritons (SPPs) carrying orbital angular momentum. A specific design allows us to couple the PVL with nanostructures placed at its center. The proposed configuration allows a simultaneous nanofocusing effect on four facing planar nanotips, showing efficient condensation of SPPs at the metal-air interface toward the end point of the tips. An optimized fabrication process allows us to prepare high-quality structures with a sharp tip apex. Near-field scanning optical microscopy has been used to demonstrate the nanofocusing effect. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|