TY - JOUR
T1 - Growth and optical properties of different compositions of LiNbO3 single crystal fibers
AU - Chen, Chi Yung
AU - Chen, Jyh Chen
AU - Chia, Chih Ta
N1 - Funding Information:
The authors gratefully acknowledge the support of the National Science Council of Taiwan, ROC for their support of this work through Grant No. NSC 93-2212-E-008-011. We also would like to thank Dr. Hsiang-Lin Liu from the Department of Physics, National Taiwan Normal University, for the loan of the UV absorption spectrum equipment.
PY - 2007/11
Y1 - 2007/11
N2 - In this study the laser-heated pedestal growth (LHPG) method was used to grow lithium niobate (LiNbO3) single crystal fibers. The composition ratio were: [Li2CO3]/[Nb2O5] = 44:56, 45:55, 46:54, 47:53, 48:52, 48.6:51.4, 49:51 and 50:50 and were achieved by using different seed rods. The lattice parameters and crystalline structure of the crystals were determined by X-ray Single-Crystal Diffractometer (X-ray/CCD). The UV absorption spectra, Fourier-transform infrared spectrometer and Raman scattering spectroscopy results were used to find the optical properties and standard characterization of the different LiNbO3 single crystals. We note that the wavelength of the UV absorption edge was less when the Li2O composition was large. The plotted results, with the exception of the stoichiometric lithium niobate results, tended to fit a 2nd order polynomial curve. Transformation of the O-H absorption bands was observed. The Full-Width Half-Maximum (FWHM) of the Raman peak was found at 152 cm-1 in the E(TO) mode and decreased linearly as the amount of the Li2O composition increased. The Raman scattering results confirmed that the structure of the LiNbO3 crystals became more rigid when the amount of the Li2O composition increased.
AB - In this study the laser-heated pedestal growth (LHPG) method was used to grow lithium niobate (LiNbO3) single crystal fibers. The composition ratio were: [Li2CO3]/[Nb2O5] = 44:56, 45:55, 46:54, 47:53, 48:52, 48.6:51.4, 49:51 and 50:50 and were achieved by using different seed rods. The lattice parameters and crystalline structure of the crystals were determined by X-ray Single-Crystal Diffractometer (X-ray/CCD). The UV absorption spectra, Fourier-transform infrared spectrometer and Raman scattering spectroscopy results were used to find the optical properties and standard characterization of the different LiNbO3 single crystals. We note that the wavelength of the UV absorption edge was less when the Li2O composition was large. The plotted results, with the exception of the stoichiometric lithium niobate results, tended to fit a 2nd order polynomial curve. Transformation of the O-H absorption bands was observed. The Full-Width Half-Maximum (FWHM) of the Raman peak was found at 152 cm-1 in the E(TO) mode and decreased linearly as the amount of the Li2O composition increased. The Raman scattering results confirmed that the structure of the LiNbO3 crystals became more rigid when the amount of the Li2O composition increased.
KW - Infrared and Raman spectroscopy
KW - Laser heated pedestal growth method
KW - Lithium niobate
KW - UV absorption spectroscopy
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U2 - 10.1016/j.optmat.2006.11.063
DO - 10.1016/j.optmat.2006.11.063
M3 - Article
AN - SCOPUS:35148875682
SN - 0925-3467
VL - 30
SP - 393
EP - 398
JO - Optical Materials
JF - Optical Materials
IS - 3
ER -