| Reducing self defocusing |
| Reducing field by 0.7 reduces ionization by >1
order |
| Tunneling ionization |
| Multiphoton ionization |
| Selection
rule : Less ionization channels in circular |
|
|
| F.A. Ilkov et al. J. Phys.
B, 25 (1992) |
|
| A.M. Perelomov et
al. JETP, 24, (1966) |
|