Ebook: Super-Intense Laser-Atom Physics

The rapid development of powerful pulsed lasers is at the origin of a conside­ rable interest in studying the response of an atom, a molecule (or a solid) to a strong electromagnetic field. It is now possible to produce at the laboratory scale, ultra-short 13 pulses with a duration of 100 femtoseconds (10- second) and a power of the order 12 of 1 terawatt (10 Watt). Under these conditions, very high peak intensities may be obtained and electric fields exceeding typical electron binding fields in atoms are generated. The interaction of an atom or a molecule with such electromagnetic fields has a highly non-linear character which leads to unexpected phenomena. Amongst them, - above-threshold ionization (ATI) i.e. the absorption of additional photons in excess of the minimal number necessary to overcome the ionization potential and its molecular counterpart, above-threshold dissociation (ATD); - generation of very high harmonics of the driving field; - stabilization of one-electron systems in strong fields. These processes were the main topics of two international meetings which were held in 1989 and 1991 in the United States under the common name SILAP (Super-Intense Laser-Atom Physics).

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Content:
Front Matter....Pages i-x
Silap III: An Overview....Pages 1-5
Front Matter....Pages 7-7
Recent Results in High-Order Harmonic Generation....Pages 9-17
Angular Distributions of High-Order Harmonics....Pages 19-29
Angularly Resolved Ultra High Harmonic Generation Experiments with Picosecond Laser Pulses....Pages 31-41
High-Order Sum and Difference-Frequency Generation in Helium....Pages 43-52
Contribution of Bound-Bound Transitions to High-Order Harmonic Generation....Pages 53-61
Symmetry Breaking and the Control of Harmonics with Strong Short Laser Pulses....Pages 63-71
Propagation of Intense Ultrashort Pulses and Harmonics in Gases....Pages 73-82
Multiple Harmonic Radiation from Metal Surfaces Induced by Strong Laser Pulses....Pages 83-92
Front Matter....Pages 93-93
Dynamics of Short-Pulse Excitation, Ionization and Harmonic Conversion....Pages 95-110
Atoms in Super-Intense Fields: Stabilization Ionization and High-Harmonic Emission....Pages 111-127
Multiphoton Ionization of Atomic Hydrogen in Intense Laser Pulses: The Role of Rydberg States....Pages 129-144
Structure in the Above Threshold Ionization (ATI) Spectrum Under Strong Femtosecond Pulses....Pages 145-153
Ionization in Strong Fields....Pages 155-171
Stabilization of Excited States and Harmonic Generation: Recent Theoretical Results in the Sturmian-Floquet Approach....Pages 173-184
The Use of the Time Correlation Function in Floquet Theory....Pages 185-194
Some recent developments in multiphoton ionization of atoms in intense fields....Pages 195-212
Atomic State Effects in Stabilization....Pages 213-224
Stabilization Within a Classical Context....Pages 225-232
Dynamical Stabilization of Atoms at Current Laser Performances....Pages 233-244
Front Matter....Pages 93-93
Strong-Field Interference Stabilization in Atoms and Molecules....Pages 245-259
Stability of Hydrogen Atom in Rydberg States in a Laser Field....Pages 261-268
Stepwise Decay in the Photoionization of Rydberg Atoms....Pages 269-278
Population Trapping in Excited States....Pages 279-286
Atomic Physics with Intense, Subpicosecond Half-Cycle Pulses....Pages 287-299
R-Matrix-Floquet Theory of Multiphoton Processes....Pages 301-316
Ionization of Hydrogen Atoms by Circularly Polarized E-M Field....Pages 317-325
Front Matter....Pages 327-327
Dynamics of Dissociation Versus Ionization in Strong Laser Fields....Pages 329-339
Molecules in Strong Laser Fields: Why are the Fragments Aligned?....Pages 341-350
Stabilization and Coherence in the Photodissociation of Diatomic Molecules by Intense Lasers....Pages 351-362
Front Matter....Pages 363-372
Single and Double Photoionization of Two-Electron Systems....Pages 373-373
Sequential vs. Simultaneous Ionization of Two-Electron Atoms by Intense Laser Radiation....Pages 375-390
Two-Electron Atoms in Ultra Short, Intense Pulses....Pages 391-401
Quasiclassical Approach to Ionization of Atoms by Strong Laser Pulses: Comparison with the “Simpleman’s” Models and Newtonian Dynamics....Pages 403-411
Stabilization of Multielectron Atoms: Classical Approach....Pages 413-424
Multiphoton Detachment of Hydrogen Negative Ion....Pages 425-434
Strong Field Predictions for Negative Ions in Short Laser Pulses....Pages 435-443
H- in Intense Laser Fields: Laser — Induced Excited States and Dichotomy....Pages 445-459
Electron-Energy Resolved Experiments on Multiphoton Detachment from Negative Ions....Pages 461-481
Back Matter....Pages 483-491
Observation of Resonant Excess Photon Detachment Via a Window Resonance in the Negative Cesium Ion....Pages 501-507
....Pages 493-500