Cubic self-action effects in photonic-crystal microcavities

Third-order nonlinear-optical self-action effects in photonic-crystal microcavities have been studied. Considerable defocusing has been observed in a nonlinear microcavity layer with a thickness much smaller than the wavelength. The polarization self-action effect that is manifested as the significant rotation of the polarization plane of laser radiation resonant to the microcavity mode has been observed. It has been shown that the polarization rotation angle is a linear function of the radiation power density.