Czochralski-Based Growth and Characteristics of Selected Novel Single Crystals for Optical Applications

In the Year of Professor Jan Czochralski, we with pleasure review the representative recent works of our group, Optical Single Crystals Group, NIMS, Japan. Our group has been working on the development of novel single crystals for optical applications based on the Czochralski technique. Here, 4 kinds of topics are reviewed. 1st one is ferroelectric fluoride $BaMgF_{4}$ single crystals for UV nonlinear optical applications including quasi-phase matching device fabrications. 2nd one is transparent conductive $\beta-Ga_{2}O_{3}$ single crystals as semiconductor, which has large band-gap, 4.8 eV, for LED applications. 3rd one is F-doped core-free $Y_{3}Al_{5}O_{12}$ single crystals as a potential new lens material for UV/VUV wavelength region. Last one is superior magneto-optical ${Tb_3}[Sc_{2-x}Lu_{x}](Al_{3})O_{12}$ single crystals for near infrared to visible region, and $CeF_3//PrF_3$ single crystals for UV region.