Angstrom-scale distance dependence of antenna-enhanced vibrational signals
The resonantly enhanced near-field of micrometer-sized gold antennas has been probed with Angstrom-scale resolution. In situ surface-enhanced infrared spectroscopic vibrational signals of carbon monoxide (CO) layers cold-condensed on the antennas in ultrahigh-vacuum conditions are compared to the si...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
November 19, 2012
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| In: |
ACS nano
Year: 2012, Jahrgang: 6, Heft: 12, Pages: 10917-10923 |
| ISSN: | 1936-086X |
| DOI: | 10.1021/nn304341c |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1021/nn304341c Verlag, Volltext: https://doi.org/10.1021/nn304341c 
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| Verfasserangaben: | Jörg Bochterle, Frank Neubrech, Tadaaki Nagao, and Annemarie Pucci |
| Zusammenfassung: | The resonantly enhanced near-field of micrometer-sized gold antennas has been probed with Angstrom-scale resolution. In situ surface-enhanced infrared spectroscopic vibrational signals of carbon monoxide (CO) layers cold-condensed on the antennas in ultrahigh-vacuum conditions are compared to the signals of CO layers with corresponding thicknesses on a flat gold surface. Vibrational signals of CO as well as the shift of the plasmonic resonance frequency were used to analyze the distance dependence of the near-field. The signal enhancement induced by the antennas not only decays monotonically from the surface but, in contrast to classical near-field models, shows a maximum between 10 and 15 Å and decays also toward the surface of the antenna. This effect is attributed to the spill-out of the electron wave function, as expected from quantum mechanical calculations. |
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| Beschreibung: | Gesehen am 10.10.2018 |
| Beschreibung: | Online Resource |
| ISSN: | 1936-086X |
| DOI: | 10.1021/nn304341c |