Nonlinear microwave optics in liquid suspensions of shaped microparticles

The use of shaped microparticle suspension for such active processes as phase conjugate via degenerate four-wave mixing at microwave and millimeter wavelengths is addressed. The theoretical method used to describe the interaction of shaped microparticles with coherent radiation is outlined. The generation of up to 250 mW phase conjugate radiation in a medium composed of rod-shaped carbon fibers suspended in a passive fluid dielectric that is maintained in a waveguide is reported. The theory for the nonlinear optical behavior of shaped particle suspensions is shown to be in excellent agreement with the available experimental data.<
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