Super-Intense Laser-Atom Physics

ISBN-13: 9780792368632 / Angielski / Twarda / 2001 / 416 str.

Bernard Piraux; Bernard Piraux; Kazimierz Rzazewski

Opis

The study of atomic systems exposed to super-intense laser fields de- fines an important area in atomic, molecular and optical physics. Although the concept of super-intense field has no absolute meaning, it is now usual to call an electromagnetic field super-intense when it exceeds the atomic binding field. In the case of the simplest atomic system, hydrogen in its 16 2 ground state, this occurs above an intensity of 3. 5 x 10 Wattfcm which is the atomic unit of intensity. Presently at the laboratory scale and in ex- tremely short and tightly focussed laser pulses, the electric field strength 16 18 2 reaches peak values which are of the order of 10 - 10 Wattfcm in the infrared frequency regime, the prospect being that such peak intensities may be reached within a few years in a regime of much higher frequencies (XUV or even X). The interaction of such electromagnetic fields with an atomic system has a highly non-linear character which has led to the observation of to- tally unexpected phenomena. There are three fundamental processes which have marked the beginning of an intensive research in the field of super- intense laser-atom physics (SILAP). These processes which only involve one atomic electron are (i) the so-called above-threshold ionisation i. e.

Spis treści

Preface. SILAP 2000: an overview. Part I: Double Ionization of Complex Atoms. Energy distribution of two-electron ionization of helium in an intense field; R. Lafon, et al. Double ionization in strong fields: ion momenta and correlated electron momenta; A. Staudte, et al. Mechanism of the non sequential double ionization of helium; D.G. Lappas, et al. Electron momentum distributions for double ionization in the strong field limit; S.P. Goreslavski, S.V. Popruzhenko. S-matrix theory of `recoil-ion' momentum distribution for double ionization in femtosecond laser fields; F.H.M. Faisal, A. Becker. Non-sequential double ionization: a minimal correlation approach; R. Kopold, W. Becker. Non-sequential double ionization of atoms in strong fields; K. Sacha, B. Eckhardt. Double-electron ionization of two-electron system in strong laser field; D.V. Tikhonova. Calculation of double ionization of helium; H.G. Muller. The two-electron response in laser driven helium; L.R. Moore, et al. The helium atom in strong and short laser pulses: multielectron; H. Bachau, R. Hasbani. Dynamics of a two-electron system driven by an ultrashort and intense laser pulse; B. Piraux, G. Lagmago-Kamta. Angular distributions for double ionization by an ultrashort, intense laser pulse: the case of Li-; G. Lagmago-Kamta, A.F. Starace. Two-and-three electron atoms in strong laser fields; P. Lambropoulos, et al. Part II: Ionization and Dissociation of Molecules. Tunnelling ionization and the Franck-Condon principle; J.H. Posthumus, et al. Dissociative ionization of few-electron molecules in intense laser fields; D. Dundas, et al. One-photon breakup of H+2 in a strong DC field; Z. Mulyukov, R. Shakeshaft. Part III: Interaction of Clusters with Very Intense Femtosecond Laser Pulses. Nuclear fusion in gases of deuterium clusters and hot electron generation in droplet sprays under irradiation with an intense femtosecond laser; T. Ditmire, et al. The absorption of energy by large atomic clusters from superintense laser pulses; V.P. Krainov, M.B. Smirnov. Part IV: Production of Very Intense Femtosecond Laser Pulses. A semi-classical model for high-harmonic generation; D.B. Milosevic. Beyond the simple maris model for high harmonic generation; M. Brewezyk, K. Rzazewski. Anisotropy induced polarization effects in harmonic generation by an absorptive medium; B. Borca, et al. About a new method of high harmonic amplification; E.A. Nersesov, et al. X-ray generation via stimulated recombination of electrons and Bohr's correspondence principle; A. Jaron, et al. Part V: Stabilization and Relativistic Effects in Super Strong Fields. Interference stabilization: Λ- and V-schemes, dynamics of ionization, initial coherent population of Rydberg levels and quantum phase control of the ionization yield; M.V. Fedorov, N.P. Poluektov. Computer experiments on atomic stabilization in a strong laser field; A.M. Popov, et al. Quasistationary stabilization of the decay of a weakly-bound level and its breakdown in a strong laser field; N.L. Manakov, et al. The strong field limit of atomic stabilization in ultrashort pulses; M. Dörr, et al. 3-D numerical calculations of laser atom interactions &endash; subrelativistic and weakly relativistic regime; A. Scrinzi, et al. Momentum space description of hydrogen atom interacting with a low frequency strong laser field; A. de Bohan, et al. Relativistic effects in the atomic res