Charging and plasma effects under ultrashort pulsed laser ablation

N. M. Bulgakova; A. V. Bulgakov; V. P. Zhukov; W. Marine; A. Y. Vorobyev; Chunlei Guo

doi:10.1117/12.782643

12 May 2008 Charging and plasma effects under ultrashort pulsed laser ablation

N. M. Bulgakova, A. V. Bulgakov, V. P. Zhukov, W. Marine, A. Y. Vorobyev, Chunlei Guo

Proceedings Volume 7005, High-Power Laser Ablation VII; 70050C (2008) https://doi.org/10.1117/12.782643
Event: High-Power Laser Ablation 2008, 2008, Taos, New Mexico, United States

Abstract

Based on experiments and a theoretical analysis, we raise questions on two fundamental mechanisms of femtosecond laser desorption/ablation of solids, namely Coulomb explosion (CE) and plasma etching. The effects of laser-induced ionization and surface charging are analyzed which can be responsible for ultrafast ions observed in time-of-flight mass-spectra under ultrashort laser irradiation of solids. The importance of surface charging in formation of velocity distributions of desorbed/ablated species has been revealed for conditions when the CE mechanism is inhibited. The influence of ambient plasma formation on the dynamics of heating of metallic targets by femtosecond laser pulses is studied based on 2D modeling of laser-induced target heating and dynamics of the ambient plasma. The calculations show an intriguing picture of the laser-induced ambient gas motion. We propose a model of laser-induced breakdown of an ambient gas in a region in front of the irradiated target and analyze plasma-chemical processes which can affect laser processing of surfaces in the presence of air or highly reactive media.

Citation Download Citation

N. M. Bulgakova, A. V. Bulgakov, V. P. Zhukov, W. Marine, A. Y. Vorobyev, and Chunlei Guo "Charging and plasma effects under ultrashort pulsed laser ablation", Proc. SPIE 7005, High-Power Laser Ablation VII, 70050C (12 May 2008); https://doi.org/10.1117/12.782643

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