Cord Arnold
Koordinator för Mötesplats Rydbergseminarier
Controlling photoionization using attosecond time-slit interferences
Författare
Summary, in English
When small quantum systems, atoms or molecules, absorb a high-energy photon, electrons are emitted with a well-defined energy and a highly symmetric angular distribution, ruled by energy quantization and parity conservation. These rules are based on approximations and symmetries which may break down when atoms are exposed to ultrashort and intense optical pulses. This raises the question of their universality for the simplest case of the photoelectric effect. Here we investigate photoionization of helium by a sequence of attosecond pulses in the presence of a weak infrared laser field. We continuously control the energy of the photoelectrons and introduce an asymmetry in their emission direction, at variance with the idealized rules mentioned above. This control, made possible by the extreme temporal confinement of the light-matter interaction, opens a road in attosecond science, namely, the manipulation of ultrafast processes with a tailored sequence of attosecond pulses.
Avdelning/ar
- Atomfysik
- Förbränningsfysik
- Matematisk fysik
- NanoLund: Centre for Nanoscience
- Synkrotronljusfysik
Publiceringsår
2020-05-19
Språk
Engelska
Sidor
10727-10732
Publikation/Tidskrift/Serie
Proceedings of the National Academy of Sciences of the United States of America
Volym
117
Issue
20
Dokumenttyp
Artikel i tidskrift
Förlag
National Academy of Sciences
Ämne
- Atom and Molecular Physics and Optics
Nyckelord
- Attosecond pulses
- Electron momentum spectroscopy
- Photoelectric effect
- Photoionization
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0027-8424