| Autor: |
Eckle, Petrissa, Pfeiffer, Adrian, Cirelli, Claudio, Staudte, André, Dörner, Reinhard, Muller, Harm Geert, Büttiker, Markus, Keller, Ursula |
| Zdroj: |
Ultrafast Phenomena Xvi; 2009, p60-62, 3p |
| Abstrakt: |
We used attosecond angular streaking to measure attosecond ionization dynamics in the non-adiabatic tunneling regime of helium using slightly elliptically polarized 5.9 fs pulses with a peak intensity ranging from 2.3 to 3.5 x 1014 W/cm2 (corresponding to a Keldysh parameter variation of 1.45 to 1.17). With our technique we could demonstrate intensityindependent ˵instantaneous″ ionization with an accuracy of 50 as. Numerical simulations based on the time-dependent Schrödinger equation confirm such ionization behavior with no distinct electron wave packets. This implies that we would not expect a tunneling time or multi-photon ionization delay in the ionization dynamics [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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