Gouy phase effects on photocurrents in plasmonic nanogaps driven by single-cycle pulses

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Abstract: The investigation of optical phenomena in the strong-field regime requires few-cycle laser pulses at field strengths exceeding gigavolts per meter (GV/m). Surprisingly, such conditions can be reached by tightly focusing pJ-level pulses with nearly octave spanning optical bandwidth onto plasmonic nanostructures, exploiting the field-enhancement effect. In this situation, the Gouy phase of the focused beam can deviate significantly from the monochromatic scenario. Here, we study the effect of the Gouy phase of a pulse exploited to drive coherent strong-field photocurrents within a plasmonic gap nanoantenna. While the influence of the specific Gouy phase profile in the experiment approaches the monochromatic case closely, this scheme may be utilized to identify more intricate phase profiles at sub-diffraction scale. Our results pave the way for Gouy phase engineering at picojoule (pJ) pulse energy levels, enabling the optimization of strong-field optical phenomena.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Gouy phase effects on photocurrents in plasmonic nanogaps driven by single-cycle pulses ; volume:13 ; number:15 ; year:2024 ; pages:2803-2809 ; extent:7
Nanophotonics ; 13, Heft 15 (2024), 2803-2809 (gesamt 7)

Creator: Rossetti, Andrea
Falk, Matthias
Leitenstorfer, Alfred
Brida, Daniele
Ludwig, Markus

DOI: 10.1515/nanoph-2023-0897

URN: urn:nbn:de:101:1-2407081544474.092635637879

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 14.08.2025, 10:58 AM CEST

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Rossetti, Andrea
Falk, Matthias
Leitenstorfer, Alfred
Brida, Daniele
Ludwig, Markus

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