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С. И. Страхова

Lomonosov Moscow State University

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Elena V. Gryzlova

Lomonosov Moscow State University

A. I. Magunov

Russian Academy of Sciences

Alexei N. Grum-Grzhimailo

Lomonosov Moscow State University

A N Grum-Grzhimailo

Lomonosov Moscow State University

A.N. Grum-Grzhimailo

Lomonosov Moscow State University

Michael Meyer

European X-Ray Free-Electron Laser

N M Kabachnik

Donostia International Physics Center

D. Cubaynes

Université Paris-Saclay

I. Rotter

Max Planck Institute for the Physics of Complex Systems

S. Düsterer

Deutsches Elektronen-Synchrotron DESY

Cooperative Institutions

Elettra-Sincrotrone Trieste S.C.p.A.

Tohoku University

Lomonosov Moscow State University

SPring-8

AREA Science Park

European X-Ray Free-Electron Laser

Deutsches Elektronen-Synchrotron DESY

Centre National de la Recherche Scientifique

Kyoto University

Universität Hamburg

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Laser-induced continuum structures and double poles of theS-matrix

Journal of Physics B Atomic Molecular and Optical Physics (2000)

A. I. Magunov I. Rotter С. И. Страхова

Double poles of the S-matrix and avoided level crossings are related to branch points in the complex plane. Although the number of these branch points is very small, they determine the dynamics of the system in a decisive manner. We study, in the adiabatic regime, the effects induced by two strong laser fields in the continuum of the H atom. In the photoabsorption spectra of the probe field from the ground 1s state, the coupling to the 2s, 5s, 5d and 5g states is considered. The quasi-level avoided crossing in the laser-induced continuum structures is traced theoretically as a function of the intensities of the strong laser fields. Under certain conditions, the quasi-levels cross and the S-matrix has a double pole. The relation of the laser-induced continuum structures to branch points in the complex plane is discussed.

Complex plane

Level crossing

10.1088/0953-4075/34/1/303

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Citations (59)

Ionization of atomic and trapped hydrogen by intense short VUV pulses

Mikhail N. Khaerdinov A.N. Grum-Grzhimailo Elena V. Gryzlova С. И. Страхова

Thermal ionization

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Argon photoionization in the region of the lowest resonance of the two-particle—Two-hole type

Physics Letters A (1984)

С. И. Страхова T.M. Zayac

Photoionization mode

10.1016/0375-9601(84)90558-9

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Citations (3)

Influence of interchannel interactions upon the characteristics of a “two-particle-two-hole”-type resonance in the neon atom

Physics Letters A (1981)

С. И. Страхова В.А. Шакиров

Particle (ecology)

10.1016/0375-9601(81)90955-5

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Citations (3)

Photodetachment of the H- ion

Physics Letters A (1990)

S. M. Burkov N.A. Letyaev С. И. Страхова

Photoelectric effect

Branching fraction

Branching (polymer chemistry)

10.1016/0375-9601(90)90055-s

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Citations (10)

Optical activity in the region of interfering laser-induced continuum structures

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2007)

Elena V. Gryzlova Alexei N. Grum-Grzhimailo A. I. Magunov С. И. Страхова

Optical activity of atomic medium with interfering laser induced continuum structures is studied theoretically and illustrated by the example of hydrogen. The optically active region in the atomic spectrum is scanned by linearly polarized probe field whose polarization properties are changed by the medium. Analytical equations for acquired ellipticity and polarization plane rotation are obtained. They demonstrate that the optical activity is a non-trivial function of the parameters of the driving laser fields. Numerical results are presented for the VUV probe radiation with two circularly polarized lasers, coupling the hydrogen Ep continuum with the 2s and the 5s, 5d states, respectively.

10.1117/12.752270

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Citations (1)

Angular anisotropy of cascade photons in processes of dielectronic ion recombination

Optics and Spectroscopy (1994)

В.В. Балашов Igor Bodrenko V.K. Dolinov С. И. Страхова

Pauli exclusion principle

Auger effect

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Influence of the laser-induced continuum structure on cross sections of the over threshold scattering of photons on atom

Optics and Spectroscopy (2011)

Elena V. Gryzlova A. I. Magunov С. И. Страхова

Helium atom

Atom laser

10.1134/s0030400x11020081

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Citations (2)

Laser induced optical activity in the region of autoionizing states

Journal of Physics Conference Series (2008)

Elena V. Gryzlova A N Grum-Grzhimailo A. I. Magunov С. И. Страхова

Optical activity of atomic medium in the region of laser coupled autoionizing states is studied theoretically. Analytical expressions and numerical results are obtained for the laser induced polarization rotation angle and the acquired ellipticity of the VUV radiation in the region of the He 2s2p1P autoionizing state (60.13 eV) coupled by circularly polarized laser field with the 2p2 1S or 2s3d1D states. Arotation angle of order ∼ 10° can be realized for optically transparent helium media at laser intensities of 1010 − 1012 W/cm2. Controlling the optical activity in the VUV by manipulating the laser intensity and frequency is discussed.

10.1088/1742-6596/141/1/012007

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Citations (2)

Overlapping of Rydberg autoionizing states with a broad resonance in argon

Journal of Physics B Atomic Molecular and Optical Physics (2003)

A. I. Magunov I. Rotter С. И. Страхова

We apply the non-Hermitian effective Hamiltonian approach to the description of the line profile of narrow Rydberg autoionizing states that overlap with a broad autoionizing state of the same symmetry. The variation of the line shape within the Rydberg series is explained by the coupling between narrow and broad resonance states via the continuum of decay channels. It depends on the coupling strength, the energy difference between the narrow and broad resonance states and on the Fano parameters of the individual autoionizing states. The formalism providing an analytic presentation for the coupled resonance states is applied to resonance photoionization cross sections in argon and compared with experimental data.

Autoionization

Rydberg state

Hamiltonian (control theory)

10.1088/0953-4075/36/21/l05

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Citations (7)