Investigations of laser desorption from modified surfaces of ionic single crystals

Christos Bandis; Mary L. Dawes; Y. Kawaguchi; Steve C. Langford; J. Thomas Dickinson

doi:10.1117/12.387540

7 June 2000 Investigations of laser desorption from modified surfaces of ionic single crystals

Christos Bandis, Mary L. Dawes, Y. Kawaguchi, Steve C. Langford, J. Thomas Dickinson

Proceedings Volume 3933, Laser Applications in Microelectronic and Optoelectronic Manufacturing V; (2000) https://doi.org/10.1117/12.387540
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States

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.

Citation Download Citation

Christos Bandis, Mary L. Dawes, Y. Kawaguchi, Steve C. Langford, and J. Thomas Dickinson "Investigations of laser desorption from modified surfaces of ionic single crystals", Proc. SPIE 3933, Laser Applications in Microelectronic and Optoelectronic Manufacturing V, (7 June 2000); https://doi.org/10.1117/12.387540

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