Strong field atomic ionization with linear and circular polarized light: Spectra, Cusps and Time delay

DIPC Seminars

Speaker

Anatoli Kheifets. Australian National University, Canberra, Australia

When

2015/04/24
14:00

Place

Donostia International Physics Center (DIPC). Paseo Manuel de Lardizabal, 4, Donostia

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We made significant progress in understanding strong field atomic ionization with short and intense electromagnetic pulses of various degree of polarization. The photoelectron spectra reveal peculiarity of strong field ionization in multi-photon and tunneling regimes and display a Coulomb singularity which can be removed by switching from linear to circular polarization. The time delay studies provide rigorous tests to various attosecond measuring devices. **References: Spectra and Cusps** I.A. Ivanov et al., Transverse electron momentum distribution in tunneling and over the barrier ionization regimes (in preparation) Li Zhang et al., Attosecond spatial control of electron wave packet emission dynamics [Phys. Rev. A 90, 061401(R) (2014)](http://link.aps.org/doi/10.1103/PhysRevA.90.061401) A. S. Kheifets and I. A. Ivanov Transverse electron momentum distribution in a pump-probe sequential double ionization [Phys. Rev. A 90, 033404 (2014)](http://journals.aps.org/pra/abstract/10.1103/PhysRevA.90.033404) I. A. Ivanov, Transverse photoelectron-momentum distribution for atomic ionization driven by a laser pulse with varying ellipticity [Phys. Rev. A 90, 013418 (2014).](http://journals.aps.org/pra/abstract/10.1103/PhysRevA.90.033404) **References: time delay** L. Torlina et al., Interpreting Attoclock Measurements of Tunnelling Times Nature Physics (submitted) arXiv:1402.5620 I. A. Ivanov and A. S. Kheifets Strong-field ionization of He by elliptically polarized light in attoclock configuration [Phys. Rev. A 89, 021402(R) (2014)](http://link.aps.org/doi/10.1103/PhysRevA.89.021402) D. Guènot et al., Measurements of relative photoemission time delays in noble gas atoms [J. Phys. B 47, 245602 (2014)](http://iopscience.iop.org/0953-4075/47/24/245602/article) Caryn Palatchi et al., Atomic Delay in Helium, Neon, Argon and Krypton [J. Phys. B 47, 245003 (2014)](http://iopscience.iop.org/0953-4075/47/24/245003/article) E. P. Månsson et al., Double Ionization of Xenon Probed on the Attosecond Time Scale [Nature Physics 292, 1689 (2014)](http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys2880.html)