Abstract
Melt growth of organic single crystals for nonlinear optical application is reviewed briefly, compared with that of inorganic crystals. The Bridgeman and Czochralski growth of 2-methyl-4-nitroaniline (MNA) single crystal which has extremely large nonlinear optical coefficients are described. Growth conditions of transparent and sizable MNA single crystal and origin of difficulties in melt growth, such as coloring, subgrain and fiber-like growth, discussed. It is shown that melt growth of large organic bulk crystal with opical quality is possible as well as that of inorganic crystals, but significant progrss in skill needs to be made in the present growth technique for nonlinear optical application.
