Ablation of solids by femtosecond lasers: ablation mechanism and ablation thresholds for metals and dielectrics

By E. Gamaly, A. Rode, B. Luther-Davies, V. Tikhonchuk. 2001

853 citations recorded by the source corpus.

The mechanism of ablation of solids by intense femtosecond laser pulses is described in an explicit analytical form. It is shown that at high intensities when the ionization of the target material is complete before the end of the pulse, the ablation mechanism is the same for both metals and dielectrics. The physics of this new ablation regime involves ion acceleration in the electrostatic field caused by charge separation created by energetic electrons escaping from the target. The formulas for ablation thresholds and ablation rates for metals and dielectrics, combining the laser and target parameters, are derived and compared to experimental data. The calculated dependence of the ablation thresholds on the pulse duration is in agreement with the experimental data in a femtosecond range, and it is linked to the dependence for nanosecond pulses.

Subfields: Atomic and Molecular Physics, and Optics, Computational Mechanics, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/0b969b675de70b3cec64ba58da2d17ce20ffa385

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. K. M. Tanvir Ahmmed
2. Anne-Marie Kietzig

In Computational Mechanics

1. Subrata Kumar
2. K. M. Tanvir Ahmmed
3. Anne-Marie Kietzig
4. Colin A. Grambow
5. Shashi Prakash

In Mechanics of Materials

1. K. M. Tanvir Ahmmed
2. Colin A. Grambow
3. Anne-Marie Kietzig

Citations in the corpus

• Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining (2014, background): “It was further observed that the threshold fluence does not depend on the pulse duration below 100 ps pulses [63].”
• Fabrication of microchannels: A review (2015, background): “0, 1, 2) of free electrons trapped in defects and impurities within the ablation zone.(105) Instead, it starts from a large bath of valance electrons stripped off atoms via Zener tunneling (this is not multiphoton ionization (MPI)).”