Far-field Petahertz Sampling of Plasmonic Fields
| Autor: | Wong, Kai-Fu, Li, Weiwei, Wang, Zilong, Wanie, Vincent, Månsson, Erik, Hoeing, Dominik, Blöchl, Johannes, Nubbemeyer, Thomas, Azzeer, Abdallah M., Trabattoni, Andrea, Lange, Holger, Calegari, Francesca, Kling, Matthias F. |
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| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The collective response of metal nanostructures to optical excitation leads to localized plasmon generation with nanoscale field confinement driving applications in e.g. quantum optics, optoelectronics, and nanophotonics, where a bottleneck is the ultrafast loss of coherence by different damping channels. The present understanding is built-up on indirect measurements dictated by the extreme timescales involved. Here, we introduce a straightforward field sampling method that allows to measure the plasmonic field of arbitrary nanostructures in the most relevant petahertz regime. We compare experimental data for colloidal nanoparticles to finite-difference-time-domain calculations, which show that the dephasing of the plasmonic excitation can be resolved with sub-cycle resolution. Furthermore, we observe a substantial reshaping of the spectral phase of the few-cycle pulse induced by this collective excitation and we demonstrate ad-hoc pulse shaping by tailoring the plasmonic sample. The results pave the way towards both a fundamental understanding of ultrafast energy transformation in nanosystems and practical applications of nanostructures in extreme scale spatio-temporal control of light. Comment: 31 pages, 19 figures |
| Databáze: | arXiv |
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