Microexplosions in tellurite glasses

被引:36
作者
Sundaram, SK [1 ]
Schaffer, CB
Mazur, E
机构
[1] Pacific NW Natl Lab, Environm Technol Div, Richland, WA 99352 USA
[2] Univ Calif San Diego, Dept Chem & Biochem, San Diego, CA 92093 USA
[3] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA
[4] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2003年 / 76卷 / 03期
关键词
D O I
10.1007/s00339-002-1824-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Femtosecond laser pulses were used to produce localized damage in the bulk and near the surface of baseline, Al2O3-doped and La2O3-doped sodium tellurite glasses. Single or multiple laser pulses were non-linearly absorbed in the focal volume by the glass, leading to permanent changes in the material in the focal volume. These changes were caused by an explosive expansion of the ionized material in the focal volume into the surrounding material, i.e. a microexplosion. The writing of simple structures (periodic array of voxels, as well as lines) was demonstrated. The regions of microexplosion and writing were subsequently characterized using scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS) and atomic force microscopy (AFM). Fingerprints of microexplosions (concentric lines within the region and a concentric ring outside the region), due to the shock wave generated during microexplosions, were evident. In the case of the baseline glass, no chemistry change was observed within the region of the microexplosion. However, Al2O3-doped and La2O3-doped glasses showed depletion of the dopant from the edge to the center of the region of the microexplosions, indicating a chemistry gradient within the regions. Interrogation of the bulk- and laser-treated regions using micro-Raman spectroscopy revealed no structural change due to the microexplosions and writing within these glasses.
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收藏
页码:379 / 384
页数:6
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