TY - JOUR
T1 - Formation of LiNbO3 crystals at the surface of TeO2 -based glass by YAG laser-induced crystallization
AU - Sugita, H.
AU - Honma, T.
AU - Benino, Y.
AU - Komatsu, T.
N1 - Funding Information:
This work was supported from Ministry of Internal Affairs and Communications Strategic Information and Communications R&D Promotion Programmes (SCOPE), Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports, Culture and Technology, Japan, and by the 21st Century Centre of Excellence (COE) Programme in Nagaoka University of Technology.
PY - 2007/8
Y1 - 2007/8
N2 - Lithium niobate LiNbO3 crystals were formed at the surface of CuO (1 mol%)-doped 25Li2O-25Nb2O5-50TeO2 glass (mol%) by heat-assisted (150 {ring operator}C) continuous-wave Nd:YAG laser irradiations with a wavelength of λ=1064 nm. Nd:YAG laser energies absorbed by Cu2+ ions (d-d transitions) were converted to the lattice vibrations of surrounding Cu2+ ions (nonradiative relaxations), giving the increase in the temperature of the laser irradiated local region. The formation of LiNbO3 crystals was confirmed from micro-Raman scattering spectra. For the line patterned by a laser scanning with a power of 0.59 W and a speed of 6 μm/s, the possibility of a c-axis orientation of LiNbO3 crystals along the laser scanning direction was proposed. The present study demonstrates that the combination of Cu2+ and Nd:YAG laser with λ=1064 nm, i.e. transition metal atom heat processing, is effective in inducting LiNbO3 crystals in TeO2-based glasses.
AB - Lithium niobate LiNbO3 crystals were formed at the surface of CuO (1 mol%)-doped 25Li2O-25Nb2O5-50TeO2 glass (mol%) by heat-assisted (150 {ring operator}C) continuous-wave Nd:YAG laser irradiations with a wavelength of λ=1064 nm. Nd:YAG laser energies absorbed by Cu2+ ions (d-d transitions) were converted to the lattice vibrations of surrounding Cu2+ ions (nonradiative relaxations), giving the increase in the temperature of the laser irradiated local region. The formation of LiNbO3 crystals was confirmed from micro-Raman scattering spectra. For the line patterned by a laser scanning with a power of 0.59 W and a speed of 6 μm/s, the possibility of a c-axis orientation of LiNbO3 crystals along the laser scanning direction was proposed. The present study demonstrates that the combination of Cu2+ and Nd:YAG laser with λ=1064 nm, i.e. transition metal atom heat processing, is effective in inducting LiNbO3 crystals in TeO2-based glasses.
KW - A. LiNbO
KW - B. Laser processing
KW - C. Raman scattering spectrum
KW - D. Phase transitions
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U2 - 10.1016/j.ssc.2007.06.002
DO - 10.1016/j.ssc.2007.06.002
M3 - Article
AN - SCOPUS:34447647308
VL - 143
SP - 280
EP - 284
JO - Solid State Communications
JF - Solid State Communications
SN - 0038-1098
IS - 6-7
ER -