Advanced Atomic Interactions (PHYS 953) - Spring 2003

Prof. Zenghu Chang, Coordinator

Chapter 2: Laser-Matter Interactions (Theory)

Prof. Uwe Thumm (www.phys.ksu.edu/~thumm)

Lecture 1 (1/27) : Phenomena

• Some useful relations. Units.
• Phenomena
• Multiphoton Ionization
• Above Threshold Ionization
• Higher Harmonics Generation
• Tunneling and Over-the-Barrier Ionization

Lecture 2 (1/29): Theoretical approaches

• Rescattering Model
• Ponderomotive Energy
• Classical Excursion Range
• HHG cut-off energy
• Keldysh Model Model for ATI and HHG
• Coupled Equations for Laser-Atom Interactions
• Keldysh Approximations
• Bessel Expansion
• Dipol Selection Rule

Lecture 3 (1/31): Tunneling (ADK Theory)

• Ionization of H in a static electric field
• Generalization to One-Electron Atoms
• Tunneling in Time-Dependent Electric Fields

Lecture 4 (2/3): Floquet Theories

• Gauges
• General Floquet Ansatz
• Sturmian Floquet Expansion
• High Frequency Limit

Lecture 5 (2/5):

• Overview of the Floquet R-Matrix Theory
• Ionization and Detachment
• Laser-Assisted Electron Scattering
• Wave Packet Propagation Methods
• Direct Solution of the Schr. Equ. on a Numerical Grid
• Split-Operator Method
• Crank Nicholson, FFT, Chebychev Methods
• Numerical Implementation of Boundary Conditions

Lecture 6 (2/7):

• Wave Packet Propagation Methods (Numerical Results)

• Ionization of Atoms
• Coulomb Explosion and Dissociation of Molecules

• Intense-Field Many-Body S-matrix Theory (Overview)