Zone-leveling Czochralski growth and characterization of undoped and MgO-doped near-stoichiometric lithium tantalate crystals

Optical Properties of Mg, Fe, Co-Doped Near-Stoichiometric LiTaO3 Single Crystals

“…As the crystal grew, Mg/Ta ratio was diluted by the feed in the bottom, even though the segregation coefficient of Mg in LT is close to one. To further explain the Mg/Ta ratio, a simple mass balance relation was derived [ 13 ]. Moreover, in Crystals 3 to 5, the Fe/Ta ratios, observed in the prepared crystals, were much lower than that in the solution zone.…”

“…These raw materials were taken in appropriate proportions and ball milled for 24 hours to prepare a homogeneous mixture. To grow the SLT crystal, a continuous feeding process, the so-called ZLCz method [ 9 , 10 , 11 , 12 , 13 ] was used. The details of the crystal growth and wafer preparation can be found elsewhere [ 9 ].…”

“…In this report, we further discuss the zone-melting Czochralski (ZLCz) growth [ 9 , 10 , 11 , 12 , 13 ] of Mg, Fe co-doped SLT crystals and their optical properties. With the detailed composition measurements, the defect model would be then discussed based on the absorption spectrum of the grown crystal.…”

LiTaO3crystals with near-zero birefringence

“…Hsu et al (2008) have reported direct measurements of Li concentration in LiTaO 3 single crystals by means of inductively coupled plasma atomic emission spectroscopy. It was found that LiTaO 3 crystals with a Curie temperature, T c , at 953 K contained 49.83 mol% of Li 2 O (Hsu et al, 2008), which is in good agreement with the results of Nakamura, Higuchi et al (2002) chiometry. This confirms that the Li 2 O concentrations estimated by Nakamura, Higuchi et al (2002) by means of indirect methods (T c ) are close to the absolute values.…”

Growth and property of Zn-doped near-stoichiometric LiTaO3 crystal

“…Recently, SLT crystal doped with Mg (1.2 mol%) [5] and Sc (0.44 mol%) [6] were reported to make an evident advance in optical damage resistance. Although SLT crystals have a great potential for many device applications, their growth research has been done less compared with near-stoichiometric LiNbO 3 (SLN) crystals, which is maybe because of a higher melting point (SLT about 1550 1C and SLN about 1150 1C).…”