A5049747126- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Spectroscopy and Quantum Chemical Studies
- Laser-Plasma Interactions and Diagnostics
- Advanced Chemical Physics Studies
Moscow Power Engineering Institute
2019-2024
Moscow Institute of Physics and Technology
2018-2024
Moscow Aviation Institute
2019-2023
Prokhorov General Physics Institute
2018
Studying the dynamics of dark states is challenging due to their inability undergo single-photon emission or absorption. This challenge made even more difficult for autoionizing owing ultrashort lifetime a few femtoseconds. High-order harmonic spectroscopy recently appeared as novel method probe ultrafast single atomic molecular state. Here, we demonstrate emergence new type resonance state manifestation coupling between Rydberg and dressed by laser photon. Through high-order generation,...
Abstract We theoretically study the generation of attosecond XUV pulses via high-order frequency mixing (HFM) two intense generating fields, and compare this process with more common harmonic (HHG) process. calculate macroscopic signal by numerically integrating 1D propagation equation coupled 3D time-dependent Schrödinger equation. analytically find length scales which limit quadratic growth HFM length. Compared to HHG these are much longer for a group components, orders defined frequencies...
The high-order harmonic spectrum generated in a two-color intense laser field under certain conditions has pronounced maximum caused by the so-called spectral caustic. Using numerical solution of three-dimensional time-dependent Schr\"odinger equation we study width and degree generation enhancement due to caustic as function fundamental intensity, wavelength, atomic ionization potential. It is shown that this can be quantitatively characterized well single parameter: ratio radius free...
Advancing table-top attosecond sources in brightness and pulse duration is of immense interest importance for an expanding sphere applications. Recent theoretical studies [New J. Phys., 22 093030 (2020)] have found that high-order frequency mixing (HFM) a two-color laser field can be much more efficient than harmonic generation (HHG). Here we study the properties coherent XUV generated via HFM analytically numerically, focusing on practically important case when one fields has lower...
We suggest a new method of attosecond pulse train measurement based on two-photon Raman-type resonant interaction the XUV with an atom (Attosecond reconstruction using Transitions, ART). show analytically and numerically that auto-correlation function chirp can be measured this process. Its nature allows obtaining reasonable signal even for relatively low intensity. The interpretation results is remarkably simple generated by bi-circular field. experimental realization either measuring...
We study the generation of attosecond XUV pulses via high-order frequency mixing (HFM) two intense generating fields, and compare this process with more common harmonic (HHG) process. calculate macroscopic signal by numerically integrating 1D propagation equation coupled 3D time-dependent Schr\"odinger equation. analytically find length scales which limit quadratic growth HFM length. Compared to HHG these are much longer for a group components, orders defined frequencies fields. This results...