The parametric excitation of the low-frequency overtone in GaSe crystal by a biharmonic optical field is shown to lead to bistability of both the crystal refractive index and the optical field generated in the four-wave-mixing process. The effect appears to be much stronger in layered crystals than in crystals of higher symmetry.
© 1995 Optical Society of America
Bozena Ratajska-Gadomska and Wojciech Gadomski, "Intrinsic optical bistability in layered crystals," Appl. Opt. 34, 4326-4330 (1995)