Synthesis of frequency doubling nonlinear optical polymers, functionalized with aminonitro-stilbene dyes. Second harmonic generation in corona poled thin films

✍ Scribed by G. S'heeren; A. Persoons; P. Rondou; M. Van Beylen; C. Samyn

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 318 KB
• Volume: 29
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(93)90295-q

✦ Synopsis

The synthesis and second harmonic coefficients, d33, and d3t as well as the related susceptibilities, :t~, of two new series of (NLO-dye methacrylate)-(methyl methacrylate) copolymers were investigated. The NLO-chromophores bound covalently to the polymer chain were 4-nitro-4'-dialkylamino-ct-cyano-stilbene, 4-nitro-4'-dialkylamino-stilbene. Thin films were obtained by spin-coating and poled by a positive corona discharge using a needle electrode in order to induce noncentrosymmetry into the systems. Nonlinear susceptibilities, X ~, of the films were derived from the analysis of full-angle Maker fringe patterns at 1064 nm. X~ values as high as 3.2.10 -7 esu could be measured.