Nonlinear Magneto-Optic Effects with Ultra-Narrow Widths

Nonlinear Magneto-Optic Effects with Ultra-Narrow Widths Dmitry Budker , Valeriy Yashchuk , and Max Zolotorev a Department of Physics, University of California, Berkeley, California 94720-7300 b E. O. Lawrence Berkeley National Laboratory, Berkeley, California 94720 c B. P. Konstantinov Petersburg Nuclear Physics Institute, Gatchina, Russia 188350 Abstract Several dispersion-like features in the magnetic field dependence of the nonlinear magneto-optic effect were observed in an experiment performed on rubidium atoms contained in a vapor cell with anti-relaxation coating. The narrowest feature has effective resonance width γ=gμ∆Bz≈1.3 Hz, where ∆Bz≈2.8 μGs is the peak-to-peak separation. The observed nontrivial dependence of the magneto-optic effect on transverse magnetic fields is discussed. The results of this work may be applied to low-field magnetometry, to parity and time reversal invariance violation experiments, etc.