Attosecond Ionization and Tunneling Delay Time Measurements in Helium
Goethe University Frankfurt · University of Geneva · +3 more institutions
Abstract
It is well established that electrons can escape from atoms through tunneling under the influence of strong laser fields, but the timing of the process has been controversial and far too rapid to probe in detail. We used attosecond angular streaking to place an upper limit of 34 attoseconds and an intensity-averaged upper limit of 12 attoseconds on the tunneling delay time in strong field ionization of a helium atom. The ionization field derives from 5.5-femtosecond-long near-infrared laser pulses with peak intensities ranging from 2.3 x 10(14) to 3.5 x 10(14) watts per square centimeter (corresponding to a Keldysh parameter variation from 1.45 to 1.17, associated with the onset of efficient tunneling). The…
Citation impact
- FWCI
- 16.15
- Percentile
- 100%
- References
- 26
Authors
8- PEP. EckleCorresponding
Goethe University Frankfurt, University of Geneva, Board of the Swiss Federal Institutes of Technology, Institute for Atomic and Molecular Physics, Steacie Institute for Molecular Sciences
- ANAdrian N. Pfeiffer
Goethe University Frankfurt, University of Geneva, Board of the Swiss Federal Institutes of Technology, Institute for Atomic and Molecular Physics, Steacie Institute for Molecular Sciences
- CCClaudio Cirelli
Goethe University Frankfurt, University of Geneva, Board of the Swiss Federal Institutes of Technology, Institute for Atomic and Molecular Physics, Steacie Institute for Molecular Sciences
- ASA. Staudte
Goethe University Frankfurt, University of Geneva, Board of the Swiss Federal Institutes of Technology, Institute for Atomic and Molecular Physics, Steacie Institute for Molecular Sciences
- RDR. Dörner
Goethe University Frankfurt, University of Geneva, Board of the Swiss Federal Institutes of Technology, Institute for Atomic and Molecular Physics, Steacie Institute for Molecular Sciences
Topics & keywords
- Attosecond
- Streaking
- Atomic physics
- Physics
- Ionization
- Double ionization
- Femtosecond
- Quantum tunnelling