Laser-induced damage in dielectrics with nanosecond to subpicosecond pulses

Journal Article · Mon Mar 20 04:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.2248· OSTI ID:6457186

Stuart, B C; Feit, M D; Rubenchik, A M; Shore, B W; Perry, M D ^[1]

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1. Lawrence Livermore National Laboratory, P.O. Box 808, L-443, Livermore, California 94550 (United States)

We report extensive measurements of damage thresholds for fused silica and calcium fluoride at 1053 and 526 nm for pulse durations [tau] ranging from 270 fs to 1 ns. Qualitative differences in the morphology of damage and a departure from the diffusion-dominated [tau][sup 1/2] scaling indicate that damage results from plasma formation and ablation for [tau][le]10 ps and from conventional melting and boiling for [tau][gt]100 ps. A theoretical model based on electron production via multiphoton ionization, Joule heating, and collisional (avalanche) ionization is in good agreement with experimental results.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6457186
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 74:12; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
360606 -- Other Materials-- Physical Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CHALCOGENIDES
DAMAGE
ELECTRIC HEATING
ELECTROMAGNETIC RADIATION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HEATING
IONIZATION
IRRADIATION
JOULE HEATING
LASER RADIATION
MINERALS
MULTI-PHOTON PROCESSES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOTOIONIZATION
PHYSICAL RADIATION EFFECTS
PLASMA
PLASMA HEATING
PULSED IRRADIATION
RADIATION EFFECTS
RADIATIONS
RESISTANCE HEATING
SILICA
SILICON COMPOUNDS
SILICON OXIDES