We present what is to our knowledge the first experimental observation of the specular nonlinear anisotropic polarization effect of a pump-induced polarization-plane rotation for normal-incidence reflection from the (001) surface of a cubic crystal. In GaAs, azimuth rotation of the order of 9 × 10−6 rad is seen for a pump intensity of 75 MW/cm−2 at 750 nm, from which the anisotropic component of the cubic nonlinearity |Re(χxxxx − 2χxxyy − χxyyx )| = 5 × 10−9 esu is found.
© 1995 Optical Society of America
Original Manuscript: September 12, 1994
Published: February 15, 1995
A. R. Bungay, Yu. P. Svirko, S. V. Popov, and N. I. Zheludev, "Specular nonlinear anisotropic polarization effect along fourfold crystal symmetry axes," Opt. Lett. 20, 356-358 (1995)