Abstract
Interpretation of spatial and time resolved images of rear surface ns laser damage in dielectrics requires understanding of the dynamic interaction of the incoming laser beam with the confined expanding plasma in the material. The detailed kinetics of the plasma, involving both expansion and retraction, depends on details of reflection and absorption in the hot material. The growth of the hot region is treated using a model previously developed to understand laser peening. The pressure is found to scale as the square root of laser intensity and drops off slowly after energy deposition is complete. For the conditions of our experimental observations in fused silica, our model predicts a pressure of about 9 GPa and a surface expansion velocity of about 1.5 km/sec, in good agreement with experimental observation.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Publisher | SPIE |
| Volume | 8885 |
| ISBN (Print) | 9780819497536 |
| DOIs | |
| State | Published - 2013 |
| Externally published | Yes |
| Event | 45th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials: 2013 - Boulder, CO, United States Duration: Sep 22 2013 → Sep 25 2013 |
Other
| Other | 45th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials: 2013 |
|---|---|
| Country | United States |
| City | Boulder, CO |
| Period | 9/22/13 → 9/25/13 |
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Keywords
- Laser ablation
- Laser-induced breakdown
- Laser-induced damage
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Interaction of laser pulse with confined plasma during exit surface nanosecond laser damage. / Rubenchik, Alexander M.; Feit, Michael D.; Demos, Stavros G.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8885 SPIE, 2013. 88851D.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Interaction of laser pulse with confined plasma during exit surface nanosecond laser damage
AU - Rubenchik, Alexander M.
AU - Feit, Michael D.
AU - Demos, Stavros G.
PY - 2013
Y1 - 2013
N2 - Interpretation of spatial and time resolved images of rear surface ns laser damage in dielectrics requires understanding of the dynamic interaction of the incoming laser beam with the confined expanding plasma in the material. The detailed kinetics of the plasma, involving both expansion and retraction, depends on details of reflection and absorption in the hot material. The growth of the hot region is treated using a model previously developed to understand laser peening. The pressure is found to scale as the square root of laser intensity and drops off slowly after energy deposition is complete. For the conditions of our experimental observations in fused silica, our model predicts a pressure of about 9 GPa and a surface expansion velocity of about 1.5 km/sec, in good agreement with experimental observation.
AB - Interpretation of spatial and time resolved images of rear surface ns laser damage in dielectrics requires understanding of the dynamic interaction of the incoming laser beam with the confined expanding plasma in the material. The detailed kinetics of the plasma, involving both expansion and retraction, depends on details of reflection and absorption in the hot material. The growth of the hot region is treated using a model previously developed to understand laser peening. The pressure is found to scale as the square root of laser intensity and drops off slowly after energy deposition is complete. For the conditions of our experimental observations in fused silica, our model predicts a pressure of about 9 GPa and a surface expansion velocity of about 1.5 km/sec, in good agreement with experimental observation.
KW - Laser ablation
KW - Laser-induced breakdown
KW - Laser-induced damage
UR - http://www.scopus.com/inward/record.url?scp=84892633807&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84892633807&partnerID=8YFLogxK
U2 - 10.1117/12.2030482
DO - 10.1117/12.2030482
M3 - Conference contribution
SN - 9780819497536
VL - 8885
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - SPIE
ER -