Journal
OPTICS EXPRESS
Volume 24, Issue 1, Pages 92-101Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.000092
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Funding
- Max Planck Society
- DFG via the Cluster of Excellence: Munich Center for Advanced Photonics (MAP)
- EU via the ERC grant ATTOCO
- King Abdullah University of Science and Technology (KAUST)
- Global Research Laboratory Program [2009-00439]
- Max Planck POSTECH/KOREA Research Initiative Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT & Future Planning [2011-0031558]
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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. (C) 2016 Optical Society of America
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