Laser patterning and preferential orientation of two-dimensional planar β-BaB2O4 crystals on the glass surface

► Laser-induced crystallization method is applied to pattern β-BaB2O4 crystals. ► Two-dimensional planar crystals are patterned on the glass surface. ► Preferential growth orientation of β-BaB2O4 crystals is confirmed. ► Crystal growth direction is perpendicular to the laser scanning direction.