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arXiv · 2008.11189

Clocking plasmon nanofocusing by THz near-field streaking

Lara Wimmer·Benjamin Schröder·Murat Sivis·Georg Herink·Claus Ropers
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Abstract

We apply terahertz (THz) near-field streaking in a nanofocusing geometry to investigate plasmon polariton propagation on the shaft of a conical nanotip. By evaluating the delay between a streaking spectrogram for plasmon-induced photoemission with a measurement for direct apex excitation, we obtain an average plasmon group velocity, which is in agreement with numerical simulations. Combining plasmon-induced photoemission with THz near-field streaking facilitates extensive control over localized photoelectron sources for time-resolved imaging and diffraction.

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Lara Wimmer, Benjamin Schröder, Murat Sivis, Georg Herink, Claus Ropers. 2020-08-25. Clocking plasmon nanofocusing by THz near-field streaking. https://doi.org/10.1063/1.4991860

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