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Título: | Resonant plasmonic and vibrational coupling in a tailored nanoantenna for infrared detection |
Autor: | Neubrech, Frank; Pucci, Annemarie; Cornelius, Thomas Walter; Karim, Shafqat; García-Etxarri, Aitzol CSIC ORCID CVN; Aizpurua, Javier CSIC ORCID | Palabras clave: | [PACS] Optical properties of quantum wires [PACS] Intensities and shapes of molecular spectral lines and bands [PACS] Collective excitations (surface/interface states) [PACS] Infrared and Raman spectra (condensed matter) |
Fecha de publicación: | 7-oct-2008 | Editor: | American Physical Society | Citación: | Physical Review Letters 101, 157403 (2008) | Resumen: | A novel resonant mechanism involving the interference of a broadband plasmon with the narrowband vibration from molecules is presented. With the use of this concept, we demonstrate experimentally the enormous enhancement of the vibrational signals from less than one attomol of molecules on individual gold nanowires, tailored to act as plasmonic nanoantennas in the infrared. By detuning the resonance via a change in the antenna length, a Fano-type behavior of the spectral signal is observed, which is clearly supported by full electrodynamical calculations. This resonant mechanism can be a new paradigm for sensitive infrared identification of molecular groups. | Descripción: | 4 pages, 4 figures.-- PACS nrs.: 78.67.Lt, 33.70.-w, 73.20.Mf, 78.30.-j. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.101.157403 | URI: | http://hdl.handle.net/10261/8505 | DOI: | 10.1103/PhysRevLett.101.157403 | ISSN: | 0031-9007 |
Aparece en las colecciones: | (CFM) Artículos |
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Resonant_plasmonic.pdf | 725,44 kB | Adobe PDF | Visualizar/Abrir |
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