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Thermally stable maleimide copolymer for second‐order nonlinear optics
Author(s) -
Choi Dong Hoon,
Song Sangyup,
Lee Taek Seung,
Park Soo Young,
Kim Nakjoong
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960103)59:1<9::aid-app2>3.0.co;2-y
Subject(s) - maleimide , comonomer , copolymer , materials science , polymer , nonlinear optics , second harmonic generation , polymer chemistry , wavelength , relaxation (psychology) , side chain , poling , nonlinear system , optics , optoelectronics , composite material , physics , psychology , social psychology , laser , quantum mechanics , dielectric , ferroelectricity
Second‐order nonlinear optical copolymer containing p ‐hydroxyphenyl maleimide as a comonomer was newly synthesized. Second‐order nonlinear optical properties of the poled films were investigated in terms of the second harmonic generation (SHG) and linear electrooptic (EO) coefficient measurement. SHG coefficient, d 33 was found to be 14 pm/V at the fundamental wavelength of 1064 nm and EO coefficient, r 33 was found to be 25‐30 pm/V at 633 nm wavelength. To prevent the orientational relaxation of poled polymer, the thermal crosslink reaction was induced using diisocyanate as a crosslinker between the side chains themselves. Temporal stabilities of second‐order NLO coefficients of crosslinked polymer systems were proved much better than that of guest‐host system or other side chain polymers. © 1996 John Wiley & Sons, Inc.