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Laser-driven detonation wave in hafnium oxide film: Defect controlled laser damage and ablation
- Source :
- Journal of Applied Physics. 128:123101
- Publication Year :
- 2020
- Publisher :
- AIP Publishing, 2020.
-
Abstract
- An ion-beam sputtered film of hafnium oxide was irradiated with an intense nanosecond laser pulse above the ablation threshold. The transmitted laser power was measured as a function of time, with a resolution of a few hundred picoseconds. The spatial origin of the defect-triggered ablation was monitored for each event. A phenomenological model of a rapidly expanding, absorbing disk can explain the observed time dependent transmission and structure sizes of the affected material. The required expansion speeds, ranging from 1 to 100 km/s, and their observed dependence on the local laser intensity, are compatible with a laser-driven detonation wave as described by the Chapman–Jouget (CJ) theory. Because the energy deposited by the laser pulse is too low to explain detonation in a material with the density of hafnium oxide, we hypothesize that the detonation wave propagates in the electron–hole subspace. We modified the CJ theory to describe laser-driven detonation in an electron–hole plasma and to account for plasma expansion sideways to the laser beam.
- Subjects :
- 010302 applied physics
Materials science
Astrophysics::High Energy Astrophysical Phenomena
medicine.medical_treatment
Detonation
General Physics and Astronomy
02 engineering and technology
Plasma
021001 nanoscience & nanotechnology
Laser
Ablation
01 natural sciences
law.invention
Pulse (physics)
law
Picosecond
0103 physical sciences
Phenomenological model
medicine
Laser power scaling
Atomic physics
0210 nano-technology
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 128
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........c9c227010df1614957b19e5f163f4a31
- Full Text :
- https://doi.org/10.1063/5.0015406