Physics 111 Advanced Laboratory. Professor Sumner Davis This is the first of two videos accompanying the Non-Linear Spectroscopy and Magneto-Optics Experiment, providing students with an introduction to the theory, apparatus, and procedures. The experiment consists of three sections: (1) students learn to operate a diode laser system and characterize its performance using a Fabry-Perot spectrum analyzer, (2) Doppler-broadened laser-induced fluorescence and Doppler-free saturated absorption spectra of the rubidium D2 line (780 nm) are recorded and analyzed, and (3) the near-resonant magneto-optical rotation is investigated. Nonlinear light-atom interaction leads to spectacular manifestations of the resonant Faraday Effect - polarization plane rotation in a magnetic field applied along the direction of light propagation radically different from the linear case. In particular, narrow (~30 Hz) effective line widths are observed in this experiment corresponding to a rotation enhancement by some seven orders of magnitude compared to the linear Faraday rotation. http://advancedlab.org

Diana Taylor presented her lecture as part of the Townsend Center for the Humanities' Forum on the Humanities and the Public World. Taylor is founder and director of The Hemispheric Institute of Performance and Politics and Professor of Performance Studies and Spanish at New York University. As a major contributor to the area of Performance Studies in the Americas, her work focuses on Latin American and U.S. theatre and performance, performance and politics, feminist theatre and performance in the Americas, hemispheric studies, and trauma studies. Sponsored by the Doreen B. Townsend Center for the Humanities http://townsendcenter.berkeley.edu/