부산대학교 도서관

Crack free potassium lithium niobate (KLN) single crystals have been grown by the resistance heating Czochralski technique. Homogeneous and crack free samples of about 6/spl times/6/spl times/7 mm were used to study the lattice vibration spectra using Raman and infrared reflectivity spectroscopy. The results showed that the influence of Li ions in the C sites in the KLN crystal on the characteristic Raman and infrared reflectivity spectra of the Nb-O octahedral ions is striking. In particular, the symmetric bend vibration mode /spl nu//sub 5/ was split into three Raman lines, the antisymmetric bend vibration mode /spl nu//sub 4/ in the infrared spectrum was also split into three lines, and the antisymmetric stretch vibration mode /spl nu//sub 3/ was broadened greatly and split slightly. The crystals obtained by this method have good quality and second harmonic generation properties.