Abstract
AbstractPhotoisomerization has been used to induce polar order in azo‐dye‐containing polymeric liquid crystalline oligosiloxanes at room temperature. The extent of the induced polar order was probed using a Maker fringe analysis at 1064 and 1542 nm. All samples studied at 1064 nm gave asymmetric fringe maxima, which was ascribed to a gradient in the induced polar order. The benefits of this poling mechanism, which operates on the combined effect of both light and static electric fields, was highlighted via poling of a defined area of the liquid crystal. This ability to selectively write polar structures into the liquid crystals may lead to electro‐optic diffractive devices.
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