Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Kheifets, Anatoli"'
Autor:
Kheifets, Anatoli S.
Resonances leave prominent signatures in atomic and molecular ionization triggered by the absorption of single or multiple photons. These signatures reveal various aspects of the ionization process, characterizing both the initial and final states of
Externí odkaz:
http://arxiv.org/abs/2410.16696
Two-photon atomic ionization driven by time-locked XUV and IR pulses allows to study dynamics of Fano resonances in time and energy domains. Different time evolution of the two interfering pathways leading to a Fano resonance can be exploited to turn
Externí odkaz:
http://arxiv.org/abs/2405.14080
High-order harmonics generation (HHG) is the only process that enables table-top-size sources of extreme-ultraviolet (XUV) light. The HHG process typically involves light interactions with gases or plasma-material phases that hinder wider adoption of
Externí odkaz:
http://arxiv.org/abs/2402.00327
Autor:
Kheifets, Anatoli
A strong helicity dependence of reconstruction of attosecond bursts by beating of two-photon transitions (RABBITT) with circularly polarized XUV and IR pulses was reported by Han et al. [Nature Physics 19, 230 and arXiv 2302.04137 (2023)]. They attri
Externí odkaz:
http://arxiv.org/abs/2306.04864
Autor:
Kheifets, Anatoli S., Xu, Zhongtao
The mutual angle formed by the non-collinear polarization axes of two laser pulses is used to control two-photon XUV+IR ionization of noble gas atoms in the process of reconstruction of attosecond bursts by beating of two-photon transitions (RABBITT)
Externí odkaz:
http://arxiv.org/abs/2304.13889
Determination and interpretation of Wigner-like photoionisation delays is one of the most active fields of attosecond science. Previous results have suggested that large photoionisation delays are associated with structured continua, but a quantitati
Externí odkaz:
http://arxiv.org/abs/2301.03697
Shape resonances in photoionization of atoms and molecules arise from a particular geometry of the ionic potential which traps the receding photoelectron in a quasi-bound state in a particular partial wave. This mechanism allows us to connect the pho
Externí odkaz:
http://arxiv.org/abs/2211.15892
Publikováno v:
Phys. Rev. B 107, 035132 (2023)
Theoretical investigation is conducted of high-order harmonic generation (HHG) in silicon thin films to elucidate the effect of light propagation in reflected and transmitted waves. The first-principles simulations are performed of the process in whi
Externí odkaz:
http://arxiv.org/abs/2210.14430
We study orientation and two-center interference effects in attosecond time-resolved photoionization of the H$_2$ molecule. Time resolution of XUV ionization of H$_2$ is gained through the phase retrieval capability of attosecond angular streaking de
Externí odkaz:
http://arxiv.org/abs/2204.09161
Autor:
Kheifets, Anatoli S., Wielian, Rickson, Ivanov, Igor A., Wang, Anna Li, Marinelli, Agostino, Cryan, James P.
We demonstrate an accurate phase retrieval of XUV atomic ionization by streaking the photoelectron in a circularly polarized IR laser field. The streaking phase can then be converted to the atomic time delay containing the Wigner and continuum-contin
Externí odkaz:
http://arxiv.org/abs/2202.06147