Photochromic materials second-order nonlinear optical

Ferroelectric behavior has been detected for polymer 11, as a consequence of the "chiral smectic-C" stracture of the liquid crystalline phase (29). Polymer 12 is a second order nonlinear optical material, the polarizable side groups, in which can be poled in a 10-20 kV electric field to generate values in the region on 34-45 picometers per volt (30, 31), Finally, species 13 is a photochromic polymer, which undergoes a spiropyran-merocyanine transformation when exposed to ultraviolet light (32),... [Pg.217]

Optical lithography, in compound semiconductor processing, 22 193 Optically active citronellol, 24 506 Optically transparent porous gel-silica, 23 75, 76 Optical materials nonlinear, 17 442-460 second-order nonlinear, 17 444—453 third-order nonlinear, 17 453-457 Optical memory, photochromic material application, 6 602 Optical microscopy, 16 467-487 history of, 16 467-469 in kinetic studies, 14 622 liquid immersion, 15 186 Optical mode density, 14 849, 850-852 Optical multichannel analyzers (OMAs), 23 143... [Pg.649]