Abstract
Scattering from non-propagating isobaric entropy waves is called Rayleigh scattering. Under sufficiently intense laser excitation, stimulate Rayleigh scattering can occur. This stimulated Rayleigh scattering can be driven by one of two forces: electrostriction or absorption. Electrostriction refers to the force produced through the electric polarizability of the medium. When there is optical absorption, thermal expansion provides another coupling mechanism. These two forces produce opposite influences on the density of the medium. Electrostriction causes compression, while thermal forces cause expansion. The stimulated Rayleigh peaks corresponding to these two forces are inverted relative to each other.1 Thus, they can be made to cancel under appropriate circumstances.
© 2001 Optical Society of America
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