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Proceedings Paper

Investigations of laser desorption from modified surfaces of ionic single crystals
Author(s): Christos Bandis; Mary L. Dawes; Y. Kawaguchi; Steve C. Langford; J. Thomas Dickinson
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Paper Abstract

Wide band gap insulators irradiated with UV and/or IR pulsed lasers have been shown to yield neutrals, photoinduced electrons, and energetic positive ions suggesting occupied electronic defect states in the band gap. We explore the consequences of applying a variety of stimuli, which 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. Our experiments on a wide variety of ionic crystals find that a common theme evolves where these stimuli generate sites that strongly interact with the probing laser beam. Such interactions lead to dramatic decrease in the laser intensities needed for ejection of ions, neutrals, as well as eventual plume formation, and result in increased vulnerability of the materials to the laser radiation.

Paper Details

Date Published: 7 June 2000
PDF: 12 pages
Proc. SPIE 3933, Laser Applications in Microelectronic and Optoelectronic Manufacturing V, (7 June 2000);
Show Author Affiliations
Christos Bandis, Washington State Univ. (United States)
Mary L. Dawes, Washington State Univ. (United States)
Y. Kawaguchi, Washington State Univ. (United States)
Steve C. Langford, Washington State Univ. (United States)
J. Thomas Dickinson, Washington State Univ. (United States)

Published in SPIE Proceedings Vol. 3933:
Laser Applications in Microelectronic and Optoelectronic Manufacturing V
Henry Helvajian; Koji Sugioka; Malcolm C. Gower; Jan J. Dubowski, Editor(s)

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