3 October 1996 Blue second-harmonic generation and temporal stability of polyureasulfone films prepared by polymerization during poling
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Abstract
Poled polyureasulfone thin films having excellent transparency from near UV to visible region have been prepared by carrying out additional polymerization of 1,4- phenylene diisocyanate and 4,4'-diaminodiphenyl sulfone simultaneously with poling. The polymerization process is monitored by in-situ second harmonic generation. Under optimal conditions, d33 as large as 8.5 pm/V at a second harmonic wavelength of 532 nm has been obtained. SHG intensity decreased to about 84% of its initial value after having been kept at 100 degrees Celsius for over 1000 hours. Wavelength dispersion measurement of SHG coefficients indicates that d33 of prepared poled films increases by about a factor of three at a second harmonic wavelength of 400 nm.
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Cheng Ye, Cheng Ye, Pingrong Yu, Pingrong Yu, George K.L. Wong, George K.L. Wong, "Blue second-harmonic generation and temporal stability of polyureasulfone films prepared by polymerization during poling", Proc. SPIE 2897, Electro-Optic and Second Harmonic Generation Materials, Devices, and Applications, (3 October 1996); doi: 10.1117/12.252940; https://doi.org/10.1117/12.252940
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