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Study of Magneto-Optical and Plasma Effects in Solids.
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF PHYSICS
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This grant has been concerned with the problems of infrared generation and electron dynamics in solids. It was demonstrated that electron spins, in materials such as n-InSb, provide a strong nonlinearity for mixing laser beams. Two techniques for phase matching this interaction have been developed. In addition, these interactions have been used to study electron spin dynamics in semiconductors. Recently, it was shown that other Raman processes, such as plasmon and impurity scattering, can be used as infrared sources. In suitable materials, plasmon interactions reduce minority carriers into the 10 to the minus 12th power sec range - an effect which could serve as the basis for fast optical shutters. Author
APPROVED FOR PUBLIC RELEASE