About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Paper
Electro-optic coefficients in electric-field-poled polymer waveguides
Abstract
Planar waveguides were made from a linear epoxy copolymer of bisphenol-A diglycidyl ether and amino-nitrotolane. The refractive indices, nTMand nTEand the electro-optic coefficients, r33and r13of the poled nonlinearoptical polymer films were determined by measurements of the waveguide modes of these films at a wavelength of 632.8 nm, and the results are reported for both electrode and corona poling. The ratio of the second-order susceptibilities was found to exceed significantly the theoretically expected value of 3. The restricted motion of the nonlinear chromophores during poling provides a possible explanation of this discrepancy. Introducing a restriction parameter v (0 ≤ v ≤ 1), we develop a simple model that can account for electro-optic coefficient ratios ranging from 3 to 6. © 1991 Optical Society of America.