Mechanisms of picosecond laser-induced damage from interaction with model contamination particles on a high reflector
- University of Rochester, Laboratory for Laser Energetics, Rochester, New York
The interactions of microparticles of different materials located on the surface of a multilayer dielectric mirror with intense 1053-nm laser pulses of varying fluence and duration (10 ps and 0.6 ps) are investigated. The particles caused localized intensification of the electric field, which becomes the dominant mechanism for the onset of damage and secondary contamination of the mirror at fluences far below the pristine (without particles) laser-induced–damage threshold of the mirror. Several interaction mechanisms leading to material modification and damage are identified, including localized field intensification by multibeam interference and particle-induced microlensing, plasma-induced scalding, and secondary contamination via nanoparticle generation and particle melting. Lastly, the resulting morphologies were observed to be vulnerable to damage growth and additional damage initiation when irradiated by subsequent pulses.
- Research Organization:
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Contributing Organization:
- Laboratory for Laser Energetics, University of Rochester
- Grant/Contract Number:
- NA0003856
- OSTI ID:
- 1755247
- Alternate ID(s):
- OSTI ID: 1761189
- Report Number(s):
- 2020-98; 1611; 2564
- Journal Information:
- Optical Engineering, Journal Name: Optical Engineering Vol. 60 Journal Issue: 03; ISSN 0091-3286
- Publisher:
- SPIECopyright Statement
- Country of Publication:
- United States
- Language:
- English
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