A polyisocyanate random copolymer that contains an asymmetric chiral carbon center and Disperse Red 1 dye nonlinear optical chromophores is synthesized. The optical activity is measured in the visible and near-infrared spectral ranges, confirming the existence of induced optical chirality in the copolymer film. On application of a corona field to the slab waveguide copolymer film, the polarization rotation at the wavelength of 1.3 μm is changed, opening the possibility of chiral electro-optic modulation in a chiral polymeric waveguide thin film.
© 2001 Optical Society of America
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(190.0190) Nonlinear optics : Nonlinear optics
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
S. H. Han, J. W. Wu, J.-W. Kang, Y.-D. Shin, J.-S. Lee, and J.-J. Kim, "Induced chirality in a polyisocyanate polymeric film and the change in polarization rotation under an external electric field," J. Opt. Soc. Am. B 18, 298-301 (2001)