All-optical attoclock for imaging tunnelling wavepackets
In: ISSN: 1745-2473, 2022
Online
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Zugriff:
International audience ; Recent measurements of time delays during tunnelling of cold atoms through an optically created potential barrier have fuelled an ongoing debate about possible time delays during light-induced tunnelling of an electron from an atom. Yet, such a delay—whether it is present or not—is only one quantity characterizing the tunnelling wavepacket, whilst the underlying dynamics are richer. Here we show how to complement photo-electron detection in laser-induced tunnelling by measuring the light emitted by the tunnelling electron—the so-called Brunel radiation. Using a combination of single- and two-colour driving fields, we identify the all-optical signatures of the reshaping of the tunnelling wavepacket as it emerges from the tunnelling barrier and moves away from the core. This reshaping includes not only an effective time delay but also the time-reversal asymmetry of the ionization process, which we describe theoretically and observe experimentally. We show how both delay and reshaping are mapped onto the polarization properties of the Brunel radiation, with different harmonics behaving as different hands of a clock moving at different speeds. The all-optical detection may also allow time-resolved measurements of optical tunnelling in condensed matter systems on the attosecond time scale.
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All-optical attoclock for imaging tunnelling wavepackets
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Autor/in / Beteiligte Person: | Babushkin, Ihar ; Galán, Álvaro Jiménez ; de Andrade, José Ricardo Cardoso ; Husakou, Anton ; Morales, Felipe ; Kretschmar, Martin ; Nagy, Tamas ; Vaičaitis, Virgilijus ; Shi, Liping ; Zuber, David ; Bergé, Luc ; Skupin, Stefan ; Nikolaeva, Irina ; Panov, Nikolay ; Shipilo, Daniil ; Kosareva, Olga ; Pfeiffer, Adrian ; Demircan, Ayhan ; Vrakking, Mark ; Morgner, Uwe ; Ivanov, Misha ; Leibniz Universität Hannover=Leibniz University Hannover ; Max-Born-institut, Berlin ; Vilnius University Vilnius ; Laboratoire Matière sous Conditions Extrêmes (LMCE) ; DAM Île-de-France (DAM/DIF) ; Direction des Applications Militaires (DAM) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay ; Modélisation de la matière condensée et des interfaces (MMCI) ; Institut Lumière Matière Villeurbanne (ILM) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) ; Lomonosov Moscow State University (MSU) ; P. N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow (LPI RAS) ; Russian Academy of Sciences Moscow (RAS) ; Friedrich-Schiller-Universität = Friedrich Schiller University Jena Jena, Germany |
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Zeitschrift: | ISSN: 1745-2473, 2022 |
Veröffentlichung: | HAL CCSD ; Nature Publishing Group, 2022 |
Medientyp: | academicJournal |
DOI: | 10.1038/s41567-022-01505-2 |
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