Relative spectral tuning of the vertical versus base modes in plasmonic nanocones
| Autor: | Monika Fleischer, Christian Schäfer, Dieter P. Kern, Julia Fulmes, Pierre-Michel Adam |
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| Přispěvatelé: | Eberhard Karls Universität Tübingen = Eberhard Karls University of Tuebingen, Lumière, nanomatériaux et nanotechnologies (L2n), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Base (geometry) Mode (statistics) Bioengineering 02 engineering and technology General Chemistry Radius 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Aspect ratio (image) 0104 chemical sciences Optics Mechanics of Materials Extinction (optical mineralogy) [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic General Materials Science Electrical and Electronic Engineering 0210 nano-technology business Plasmon Excitation Electron-beam lithography |
| Zdroj: | Nanotechnology Nanotechnology, Institute of Physics, 2019, 30 (41), pp.415201. ⟨10.1088/1361-6528/ab2d5c⟩ Nanotechnology, 2019, 30 (41), pp.415201. ⟨10.1088/1361-6528/ab2d5c⟩ |
| ISSN: | 1361-6528 0957-4484 |
| DOI: | 10.1088/1361-6528/ab2d5c⟩ |
| Popis: | International audience; Gold nanocones acting as optical antennas offer an excellent geometry for focusing light near the cone tip, acting as nano-light sources with spot sizes on the order of the tip radius. However only the vertical plasmon mode oscillating in the axial direction can effectively excite the tip, whereas lateral modes oscillating along the cone base create mostly unwanted background in applications. The present work investigates the three-dimensional plasmonic mode structure of nanocones both experimentally and numerically. By tuning the nanocone aspect ratio, the modes can be spectrally tuned relative to each other, making them coincide for maximum excitation, or tuning the base mode away from the vertical mode for effective background suppression. |
| Databáze: | OpenAIRE |
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