Stable Second-Order Optical Nonlinearity of Urethane-Urea Copolymers
- 1 April 1996
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 35 (4A), L444
- https://doi.org/10.1143/jjap.35.l444
Abstract
Second-order nonlinear optical properties of corona-poled urethane-urea copolymers have been studied by the second-harmonic generation (SHG) method. As compared with a polyurethane, the copolymers exhibited higher optimum poling temperature and better temporal stability of SHG coefficients (d 33). For one of the copolymers, d 33 at a fundamental wavelength of 1064 nm was 190 pm/V, and remained at 75% of the initial value after heat treatment at 100° C for 300 h.Keywords
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