The recent development of lasers capable of producing pulses of femtosecond time duration has opened an entirely new class of optical scattering problem. Because these pulses exhibit a spatial length of the order of microns, they can actually be smaller than the dimensions of a Mie sized scattered For example, a 33-fs pulse has a spatial extent of one half of the diameter of a 20-µm sphere. This is quite different from typical scattering experiments in which the entire scatterer is exposed to a fairly uniform optical radiation field. With these ultrashort pulses, the front and back sides of the scatterer will interact with very different radiation fields.

© 1989 Optical Society of America

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