Fundamental studies of laser desorption from modified surfaces of ionic single crystals

• Published in: Radiation effects and defects in solids Vol. 156; no. 1-4; pp. 59 - 67
• Main Authors: Dickinson, J. T., Bandis, C., Langford, S. C.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Reading Taylor & Francis Group 01.12.2001; Taylor and Francis
• Subjects: Ablation; Clean metal, semiconductor, and insulator surfaces; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Defects; Electron and ion emission by liquids and solids; impact phenomena; Exact sciences and technology; Impact phenomena (including electron spectra and sputtering); Ion emission; Laser desorption; Laser-beam impact phenomena; Lattice relaxation; Photoelectronic; Photoemission; Photoemission and photoelectron spectra; Photothermal; Physical radiation effects, radiation damage; Physics; Structure of solids and liquids; crystallography; Ultraviolet, visible, and infrared radiation effects (including laser radiation); Crystal defects; Inorganic compounds; Irradiation defect; Physical radiation effects; Sodium nitrates; Surface treatments; Nitrates; Experimental study; Laser beams; Lattice relaxation; Pulsed lasers; Laser desorption; Monocrystals; Ultraviolet radiation; Photoemission; X radiation; Laser ablation technique; Ion emission; Ionic crystals; Electrons; X-ray photoelectron spectra
• ISSN: 1042-0150; 1029-4953
• DOI: 10.1080/10420150108216873

The observation of photoinduced electron and ion emissions from a variety of wide bandgap insulators under UV and/or IR irradiation suggest that these materials typically possess occupied electronic defect states in the band gap. We have investigated the consequences of a variety of defect-generating stimuli (electron irradiation, laser irradiation, mechanical treatments and heating) on electron and ion emission from inorganic ionic crystals. These stimuli generate defects that strongly interact with the probe laser on a wide variety of ionic crystals. These stimuli dramatically decrease the probe laser intensities required for ion and neutral emissions, laser damage, and plume formation. We reference a number of these effects and illustrate a selected few on one material namely single crystal NaNO 3 .