Cumulative ionization in solids in the presence of large radiation quanta and the relative role of multiphoton ionization in laser-induced damage
Abstract
Solutions to the diffusion kinetic equation for cumulative ionization are extended to the region of short radiation pulses (10 ps to 1 ns). A solution to the differential-difference quantum kinetic equation is obtained. It is shown that the dependence of the critical field on frequency and pulse length is substantially altered in the presence of large electromagnetic-field quanta. The relative roles of cumulative and multiphoton ionization in laser-induced damage to transparent dielectrics is analyzed. It is concluded that multiphoton ionization is the dominant damage mechanism.
- Publication:
-
Zhurnal Eksperimentalnoi i Teoreticheskoi Fiziki
- Pub Date:
- February 1979
- Bibcode:
- 1979ZhETF..76..617G
- Keywords:
-
- Ionizing Radiation;
- Laser Damage;
- Photoionization;
- Photon Beams;
- Pulsed Lasers;
- Solids;
- Dielectrics;
- Differential Equations;
- Electromagnetic Fields;
- Electron Avalanche;
- Electron Scattering;
- Ionic Diffusion;
- Laser Outputs;
- Radiant Flux Density;
- Lasers and Masers