Interaction of laser pulse with confined plasma during exit surface nanosecond laser damage

Alexander M. Rubenchik; Michael D. Feit; Stavros G. Demos

doi:10.1117/12.2030482

Interaction of laser pulse with confined plasma during exit surface nanosecond laser damage

Alexander M. Rubenchik, Michael D. Feit, Stavros G. Demos

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

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	https://doi.org/10.1117/12.2030482
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

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

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10.1117/12.2030482

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Rubenchik, A. M., Feit, M. D., & Demos, S. G. (2013). Interaction of laser pulse with confined plasma during exit surface nanosecond laser damage. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8885). [88851D] SPIE. https://doi.org/10.1117/12.2030482

Rubenchik, AM, Feit, MD & Demos, SG 2013, Interaction of laser pulse with confined plasma during exit surface nanosecond laser damage. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8885, 88851D, SPIE, 45th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials: 2013, Boulder, CO, United States, 9/22/13. https://doi.org/10.1117/12.2030482

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title = "Interaction of laser pulse with confined plasma during exit surface nanosecond laser damage",

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.",

keywords = "Laser ablation, Laser-induced breakdown, Laser-induced damage",

author = "Rubenchik, {Alexander M.} and Feit, {Michael D.} and Demos, {Stavros G.}",

year = "2013",

doi = "10.1117/12.2030482",

language = "English (US)",

isbn = "9780819497536",

volume = "8885",

booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

note = "45th Annual Laser Damage Symposium Proceedings - Laser-Induced Damage in Optical Materials: 2013 ; Conference date: 22-09-2013 Through 25-09-2013",

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AU - Rubenchik, Alexander M.

AU - Feit, Michael D.

AU - Demos, Stavros G.

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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

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