Electro-optic coefficients in electric-field-poled polymer waveguides

Herminghaus, Stephan; Smith, Barton A.; Swalen, J. D.

doi:10.1364/JOSAB.8.002311

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Electro-optic coefficients in electric-field-poled polymer waveguides

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Herminghaus, Stephan
Group Granular matter and irreversibility, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Herminghaus, S., Smith, B. A., & Swalen, J. D. (1991). Electro-optic coefficients in electric-field-poled polymer waveguides. Journal of the Optical Society of America B-Optical Physics, 8(11), 2311-2317. doi:10.1364/JOSAB.8.002311.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-B5E0-7

Abstract

Planar waveguides were made from a linear epoxy copolymer of bisphenol-A diglycidyl ether and amino-nitro-tolane. The refractive indices, nTM and nTE, and the electro-optic coefficients, r33 and r13, of the poled nonlinear-optical 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 ν (0 ≤ ν ≤ 1), we develop a simple model that can account for electro-optic coefficient ratios ranging from 3 to 6.