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- W4221162783 abstract "Measuring the field of visible light with high spatial resolution has been challenging, as many established methods only detect a focus-averaged signal. Here, we introduce a near-field method for optical field sampling that overcomes that limitation by employing the localization of the enhanced near-field of a nanometric needle tip. A probe field perturbs the photoemission from the tip, which is induced by a pump pulse, generating a field-dependent current modulation that can easily be captured with our electronic detection scheme. The approach provides reliable characterization of near-petahertz fields. We show that not only the spiral wave-front of visible femtosecond light pulses carrying orbital angular momentum (OAM) can be resolved, but also the field evolution with time in the focal plane. Additionally, our method is polarization sensitive, which makes it applicable to vectorial field reconstruction." @default.
- W4221162783 created "2022-04-03" @default.
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- W4221162783 date "2022-03-29" @default.
- W4221162783 modified "2023-09-30" @default.
- W4221162783 title "Spatio-temporal sampling of near-petahertz vortex fields" @default.
- W4221162783 doi "https://doi.org/10.48550/arxiv.2203.15265" @default.
- W4221162783 hasPublicationYear "2022" @default.
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