Theory of multiphoton and tunnel ionization in a bichromatic field
- Novosibirsk State University (Russian Federation)
- Russian Academy of Sciences, Siberian Branch, Budger Institute of Nuclear Physics (Russian Federation)
The imaginary-time method [6, 7] is used to calculate the multiphoton and tunnel ionization probabilities for atoms in a laser radiation field part of which is converted into the second harmonic. We assume that the first harmonic has a linear or elliptical polarization and the second harmonic is polarized linearly, with its polarization vector making an arbitrary angle with that of the first harmonic. The mean momentum of the photoelectrons knocked out from atoms is shown to depend on the phase shift between the first and second harmonics and their mutual polarization and to be identically equal to zero for a monochromatic field. An important difference between the case of elliptical polarization and the case of linear polarization of both harmonics is the absence of conditions under which the conditions for dominance of one of the two generation mechanisms considered here can be identified during the generation of terahertz radiation from the region of optical breakdown in a gas.
- OSTI ID:
- 22156450
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 116, Issue 1; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multiphoton ionization in superintense, high-frequency laser fields. I. General developments
Multiphoton ionization in superintense, high-frequency laser fields. Stabilization of atomic hydrogen in linearly polarized fields