Femtosecond studies of highly excited electrons and surface modification in metals
Abstract
Interaction of highly excited electrons in nonequilibrium states with the lattice in metals has been studied using femtosecond pulse lasers. Two ablation regimes are identified as the optical and energy penetration by examining the fluence dependence of ablated depth per pulse. Surface structuring and surface compositioning of metal substrates using a femtosecond pulsed laser irradiation is characterized with the SEM images as a function of laser fluence. Laser ablation provides a mechanism to facilitate an achievement of a nano- and microstructuring on the metal surface. Based on our results, ultrashort pulse provides wide competitive range of applications in surface structuring and patterning from nano- to microdimensional scales.
- Publication:
-
Third International Symposium on Laser Precision Microfabrication.
- Pub Date:
- February 2003
- DOI:
- 10.1117/12.486601
- Bibcode:
- 2003SPIE.4830..492D