Abstract
This chapter first introduces briefly the background of the optical guided mode technique, including the guided mode spectrum, the optical field distribution for different order modes, and various optical coupling methods to couple the radiation into the waveguides. The chapter also illustrates four different types of liquid crystal waveguide geometry, including the fully guided mode geometry, the fully leaky mode geometry, the half-leaky guided mode geometry, and the improved fully leaky guided mode geometry. The chapter also discusses the dynamic LC guided mode technique. It also presents various experimental results obtained by using different types of LC optical guided mode techniques to show the power of the techniques. The prism-coupled procedures discussed use simple planar multilayer optics theory, leading to accurate detailed comparisons of predicted responses with those observed experimentally. This leads to substantial confidence in the director profiles thus deduced, which is fundamentally why these guided wave procedures provide an underpinning to liquid crystal science.
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