Growth of Large Size Lithium Niobate Single Crystals of High Quality by Tilting-mirror-type Floating Zone Method

Abstract

Large size high quality LiNbO 3 single crystals were grown successfully by tilting-mirror-type floating zone (TMFZ) technique. The grown crystals were characterized by X-ray diffraction, etch pits density measurement, Impedance analysis, Vibrating sample magnetometry (VSM) and UV-Visible spectrometry. The effect of mirror tilting during growth on the structural, electrical, optical properties and defect density of the LiNbO 3 crystals were investigated. It was found that the defect density in the crystals reduced for tilting the mirror in the TMFZ method. The chemical analysis revealed that the grown crystals were of high quality with uniform composition. The single crystals grown by TMFZ method contains no low-angle grain boundaries, indicating that they can be used for high efficiency optoelectronic devices.

Recent Progress of Floating-Zone Techniques for Bulk Single-Crystal Growth

“…This removal is attributed to a cut-off of the light from the area. Thus, the growth of many functional materials has been successful using this technique [97][98][99][100][101][102][103]. Particularly, I mention a significant achievement of successful growth for the incongruent material LiCoO 2 which was inclusion-free using the tilted mirror.…”