PHYSICS AND ASTRONOMY COLLOQUIUM
                     Tuesday, September 4, 2001
            4:10 pm, Room 118 Physics-Astronomy Building


            D. Budker, Department of Physics, UC Berkeley
           "Resonant Nonlinear Magneto- and Electro-Optics"


Abstract:
I will discuss physical mechanisms, experimental methods, and applications
of resonant magneto- and electro-optical effects in atomic vapors.  The 
field began with the pioneering work of Macaluso and Corbino over a 
century ago on linear magneto-optical effects (where the properties of the
medium do not depend on the light power) in the vicinity of atomic
resonances.  In contrast, various nonlinear phenomena, that have been
studied both theoretically and experimentally since the late 1960's, rely
on, often dramatic, light-power-dependent modifications of optical
properties of the medium. In recent years, the field has experienced a
revival of interest which has led to a number of developments,  including
the observation of ultra-narrow (1-Hz) magneto-optical resonances,
applications in sensitive magnetometry, nonlinear electromagnetic-field 
tomography, and possible searches for parity and time-reversal invariance
violation in atoms, and other fundamental symmetry tests.