Laser ablation of sapphire with ultrashort pulses

Razvan Stoian; David Ashkenasi; Arkadi Rosenfeld; Eleanor E. B. Campbell

doi:10.1117/12.376955

1 February 2000 Laser ablation of sapphire with ultrashort pulses

Razvan Stoian, David Ashkenasi, Arkadi Rosenfeld, Eleanor E. B. Campbell

Proceedings Volume 3885, High-Power Laser Ablation II; (2000) https://doi.org/10.1117/12.376955
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

We present the results of our investigations on the surface damage/ablation threshold and processing morphology for sapphire after single and multiple laser pulse irradiation at 800 nm in the picosecond and sub-picosecond duration range. The threshold for ablation drops sharply for multiple laser shot irradiation, due to material dependent incubation effects. We observe two distinctively etch phases: `gentle' and `strong'. Monitoring the mechanism and dynamics of the ion expulsion using combination of time-of-flight mass spectroscopy and femtosecond pump-probe technique, we identified Coulomb explosion as the dominant mechanism for ion emission in the `gentle' etch phase on a time scale of 1 ps. The momenta of the emitted ions are equal under these conditions. After sufficient incubation the damage threshold decreases and the ablation is shifted towards the `strong' phase. The velocity distributions shift to lower values, evidence for `phase explosion' is seen and the ions tend here to equal kinetic energies.

Citation Download Citation

Razvan Stoian, David Ashkenasi, Arkadi Rosenfeld, and Eleanor E. B. Campbell "Laser ablation of sapphire with ultrashort pulses", Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); https://doi.org/10.1117/12.376955

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available