This article is cited in 19 papers

Interaction of radiation with matter

On the possibility of the generation of high harmonics with photon energies greater than 10 keV upon interaction of intense mid-IR radiation with neutral gases

A. S. Emelina^ab, M. Yu. Emelin^ab, M. Yu. Ryabikin<sup>ab

a</sup> Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod
^b N. I. Lobachevski State University of Nizhni Novgorod

Abstract: Based on the analytical quantum-mechanical description in the framework of the modified strong-field approximation, we have investigated high harmonic generation of mid-IR laser radiation in neutral gases taking into account the depletion of bound atomic levels of the working medium and the electron magnetic drift in a high-intensity laser field. The possibility is shown to generate high-order harmonics with photon energies greater than 10 keV under irradiation of helium atoms by intense femtosecond laser pulses with a centre wavelength of 8 – 10.6 μm.

Keywords: mid-IR lasers, atoms, ionisation, high harmonic generation, X-rays.

PACS: 42.65.Ky, 42.55.Vc, 32.80.Fb

Received: 03.03.2014

 English version: Quantum Electronics, 2014, 44:5, 470–477

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