Predamage threshold electron emission from insulator and semiconductor surfaces
Abstract
Predamage electron emission shows a dependence on fluence, bandgap and wavelength consistent with multiphoton excitation across the bandgap and inconsistent with avalanche ionization and thermionic emission models. The electron emission scales with pulselength as 1/(RADICAL)T. It is concluded that predamage electron emission is a reproducible measure of a surface to the damage threshold. The spatial variation of electron emission will be used to determine which local impurities or structural variations lead to damage.
- Publication:
-
Presented at the 16th Ann. Symp. on Optical Mater. for High Power Lasers
- Pub Date:
- February 1985
- Bibcode:
- 1985omhp.symp...15S
- Keywords:
-
- Electron Emission;
- Excitation;
- Insulators;
- Ionization;
- Laser Damage;
- Semiconductors (Materials);
- Laser Outputs;
- Physiological Effects;
- Radiation Effects;
- Solid-State Physics