Abstract
Optical second-harmonic generation has been used to study the anisotropic orientation behavior of liquid-erystal siloxane molecules embedded in a nematic and/or ferroelectric host matrix. All of the studied guest-host systems show an exceedingly high degree of in-plane anisotropy along the direction of the rubbed interior polyimide layer of the surface-stabilized liquid-crystal sample cell. Alongitudinally applied electrical field leads to susceptibility components exceeding 1 pm/V for a poled sample cell of 5 μm thickness containing 10% by weight of the siloxane guest in a nematic matrix.
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