Growth and optical properties of different compositions of LiNbO3 single crystal fibers
| Autor: | Chi Yung Chen, Jyh Chen Chen, Chih Ta Chia |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Absorption spectroscopy
Chemistry Organic Chemistry Lithium niobate Analytical chemistry Infrared spectroscopy Crystal structure Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Inorganic Chemistry chemistry.chemical_compound symbols.namesake symbols Electrical and Electronic Engineering Physical and Theoretical Chemistry Raman spectroscopy Single crystal Spectroscopy Raman scattering Diffractometer |
| Zdroj: | Optical Materials. 30:393-398 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2006.11.063 |
| Popis: | In this study the laser-heated pedestal growth (LHPG) method was used to grow lithium niobate (LiNbO 3 ) single crystal fibers. The composition ratio were: [Li 2 CO 3 ]/[Nb 2 O 5 ] = 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 LiNbO 3 single crystals. We note that the wavelength of the UV absorption edge was less when the Li 2 O 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 Li 2 O composition increased. The Raman scattering results confirmed that the structure of the LiNbO 3 crystals became more rigid when the amount of the Li 2 O composition increased. |
| Databáze: | OpenAIRE |
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