Control of the photoelectron dynamics for the effective conversion of short-pulse, frequency-modulated optical radiation into X-ray radiation
| Autor: | M. Yu. Ryabikin, A. A. Silaev, N. V. Vvedenskii, M. Yu. Emelin, O.V. Meshkov |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Physics
Photon Statistical and Nonlinear Physics Radiation Photoelectric effect Laser Atomic and Molecular Physics and Optics Spectral line Electronic Optical and Magnetic Materials law.invention law Physics::Atomic and Molecular Clusters High harmonic generation Optical radiation Physics::Atomic Physics Electrical and Electronic Engineering Atomic physics Frequency modulation |
| Zdroj: | Quantum Electronics. 45:393-400 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2015v045n05abeh015789 |
| Popis: | We report a theoretical investigation of high-order harmonic generation (HHG) in the ionisation of atoms by nonlinear frequency-modulated laser pulses of short duration. It is shown that the reduction in the instantaneous value of the laser pulse frequency can lead to a significant increase in the width of the plateau in the HHG spectrum. We have found optimal parameters of frequency modulation at which photons with energies of 1 keV are efficiently generated at a relatively low laser-pulse intensity. High HHG efficiency at optimal parameters is explained by the peculiarities of atomic ionisation dynamics and acceleration of photoelectrons by a frequency-modulated laser field. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|