Thioborates: potential nonlinear optical materials with rich structural chemistry

This review summarizes thioborates and their structural motifs ranging from zero-dimension to three-dimension. The most commonly observed building units of these examples are planar-triangle BS 3 and tetrahedron BS 4 . Thioborates possess advantages with respect to their structural diversity, optical nonlinearity, laser-induced damage threshold and transparency range, and represent potentially a rich supply of new nonlinear optical materials.