Consequences of Combining Laser Irradiation with Other Stimuli on Laser Desorption and Ablation from Wide Bandgap Insulators

When a transparent, wide bandgap insulator is exposed to sub-bandgap laser irradiation, defects at and near the surface often dominate the response in terms of particle emission and eventual ablation of material. We explored the consequences of applying a variety of stimuli that can generate defects...

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Bibliographic Details
Published inApplied surface science Vol. 154-155
Main Authors Dickinson, J T., Langford, Stephen C., Bandis, Christos, Dawes, Mary L., Kawaguchi, Yuji
Format Journal Article
LanguageEnglish
Published United States 15.02.2000
Subjects
ABLATION
DEFECTS
DESORPTION
ELECTRON BEAMS
ENVIRONMENTAL MOLECULAR SCIENCES LABORATORY
IONIC CRYSTALS
IRRADIATION
LASERS
MONOCRYSTALS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PLUMES
STIMULI
STRONG INTERACTIONS
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Summary:When a transparent, wide bandgap insulator is exposed to sub-bandgap laser irradiation, defects at and near the surface often dominate the response in terms of particle emission and eventual ablation of material. We explored the consequences of applying a variety of stimuli that can generate defects on single crystal surfaces of inorganic ionic crystals. The stimuli include: electron beam irradiation, a second laser beam, mechanical treatment, and thermal treatment. We found that a common theme evolves where these stimuli generate sites for strong interactions of the probing laser beam, leading to a dramatic decrease in the laser intensities needed for ejection of ions, neutrals, and eventual plume formation.
Bibliography:US Department of Energy (US)
AC05-76RL01830
ISSN:0169-4332
1873-5584
DOI:10.1016/S0169-4332(99)00448-1