Abstract
Molecular dynamics of a short pulse laser irradiation of a molecular crystal are performed to investigate the dependence of the mechanism of ejection on laser fluence. We find that at low laser fluences molecules are desorbed from a thin surface layer of solid sample. An increase in the laser fluence leads to the melting of the surface region and desorption occurs from an overheated melted state. An additional increase of the fluence leads to the ablation when the laser-induced pressure and phase explosion of the overheated liquid drives a collective ejection of a significant volume of irradiated material.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 167-171 |
| Number of pages | 5 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
| Volume | 153 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - Jun 1999 |
| Event | Proceedings of the 1998 4th International Conference on Computer Simulation of Radiation Effects in Solids (COSIRES) - Okayama, Jpn Duration: Sep 15 1998 → Sep 19 1998 |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Instrumentation
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Kodali, P. B. S., Zhigilei, L. V., & Garrison, B. J. (1999). Phase transition at low fluences in laser desorption of organic solids: a molecular dynamics study. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 153(1-4), 167-171. https://doi.org/10.1016/S0168-583X(99)00199-8