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| Título: | Amplitude- and phase-resolved near-field mapping of infrared antenna modes by transmission-mode scattering-type near-field microscopy |
Autor: | Schnell, Martin; García-Etxarri, Aitzol CSIC ORCID CVN; Borisov, Andrei G. CSIC; Aizpurua, Javier CSIC ORCID ; Hillenbrand, Rainer | Fecha de publicación: | 2010 | Editor: | American Chemical Society | Citación: | Journal of Physical Chemistry C 114(16): 7341-7345 (2010) | Resumen: | We describe transmission-mode scattering-type near-field optical microscopy (s-SNOM) with interferometric detection. Using this technique, we map the near-field modes of infrared antennas in both amplitude and phase. The use of dielectric probing tips, higher-harmonic demodulation, and a complex-valued subtraction of residual background yields accurate near-field images of the antenna modes. We map metallic nanorods, disks, and triangles, designed for antenna resonance at mid-infrared frequencies, in good agreement with numerical calculations of the modal field distribution. Furthermore, we show that transmission-mode s-SNOM can map the z-component of the antenna near fields. Our results establish a basis for future near-field characterization of complex antenna structures for molecular sensing and spectroscopy. | Descripción: | 5 páginas, 4 figuras.-- El pdf del artículo es la versión pre-print.-- et al. | Versión del editor: | http://dx.doi.org/10.1021/jp909252z | URI: | http://hdl.handle.net/10261/44138 | DOI: | 10.1021/jp909252z | ISSN: | 1932-7447 | E-ISSN: | 1932-7455 |
| Aparece en las colecciones: | (CFM) Artículos |
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| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| Amplitude and phase resolved near.pdf | 568,73 kB | Adobe PDF |  Visualizar/Abrir |
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