| Autor: |
Ahn B, Schötz J, Okell WA, Süßmann F, Förg B, Kim SC, Kling MF, Kim D |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2016 Jan 11; Vol. 24 (1), pp. 92-101. |
| DOI: |
10.1364/OE.24.000092 |
| Abstrakt: |
We theoretically analyze a method for characterizing propagating surface plasmon polaritons (SPPs) on a thin gold film. The SPPs are excited by few-cycle near-infrared pulses using Kretschmann coupling, and a nanotip is used as a local field sensor. This geometry removes the influence of the incident excitation laser from the near fields, and enhances the plasmon electric field strength. Using finite-difference-time-domain studies we show that the geometry can be used to measure SPP waveforms as a function of propagation distance. The effects of the nanotip shape and material on the field enhancement and plasmonic response are discussed. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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