Nonperturbative resonant strong field ionization of atomic hydrogen

Details Nonperturbative resonant strong field ionization of atomic hydrogen Nonperturbative resonant strong field ionization of atomic hydrogen

2007-07-20

arxiv.org/abs/0707.3111v1

Physics

Atomic Physics

16 pages, 11 figures, IOP style

Scientific paper

10.1088/0953-4075/40/21/004

We investigate resonant strong field ionization of atomic hydrogen with respect to the 1s-2p-transition. By "strong" we understand that Rabi-periods are executed on a femtosecond time scale. Ionization and AC Stark shifts modify the bound state dynamics severely, leading to nonperturbative signatures in the photoelectron spectra. We introduce an analytical model, capable of predicting qualitative features in the photoelectron spectra such as the positions of the Autler-Townes peaks for modest field strengths. Ab initio solutions of the time-dependent Schroedinger equation show a pronounced shift and broadening of the left Autler-Townes peak as the field strength is increased. The right peak remains rather narrow and shifts less. This result is analyzed and explained with the help of exact AC Stark shifts and ionization rates obtained from Floquet theory. Finally, it is demonstrated that in the case of finite pulses as short as 20fs the Autler-Townes duplet can still be resolved. The fourth generation light sources under construction worldwide will provide bright, coherent radiation with photon energies ranging from a tenth of a meV up to tens of keV, hence covering the regime studied in the paper so that measurements of nonperturbative, relative AC Stark shifts should become feasible with these new light sources.

Affiliated with

Also associated with

No associations

Rating

Nonperturbative resonant strong field ionization of atomic hydrogen does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Nonperturbative resonant strong field ionization of atomic hydrogen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonperturbative resonant strong field ionization of atomic hydrogen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-399202