真空蒸鍍聚合非線性光學聚亞醯胺薄膜

Nonlinear Optical Polyimide Film by Vapor Deposition Polymerization

周卓煇(J. H. Jou) ； 陸建宇(J. Y. Lu) ； 黃彥士(Y. S. Huang) ； 張維萍(W. P. Chang) ； 黃中垚(Z. Y. Huang)

《材料科學與工程》 32卷4期 (2000/01) Pp. 186-190

https://doi.org/10.6409/JMSE.200001.0186

摘要

本研究係利用即時極化蒸鍍製備客－主型二次非線性光學聚亞醯胺薄膜。此方法的特點爲在蒸鍍聚合過程中，引進具有非線性效應之活化分子並同時極化，以形成非線性光薄膜。此研究裡，做爲基材之高分子，爲半撓曲、高透光性之6FDA-ODA (6F-dianhydride-4, 4'-oxydianiline)；做爲非線性光學活化之分子，爲DR1(Disperse Red 1)。薄膜之非線性光學效應探討乃利用倍頻量測。實驗結果顯示，當活化分子摻入在薄膜呂這體積分率增加時，非線性光學侮數隨上昇，當體各人髮率爲36%時，具有最大之蠣線性光學效應及良好之倍頻安定性；當活化分子摻入量再增加時，前述效應驟降。此外，薄膜經硬化製程後，可增加其倍頻時效安全性。

關鍵字

即時極化 ； 蒸鍍聚合 ； 半撓曲型聚亞醯胺 ； 客－主型非線性光學高分子薄膜

並列摘要

A real-time poling method for preparing guest-host type second-order nonlinear optical (NLO) polymer thin film has been used in this study. The characteristic of the real-time poling method is that the NLO-active molecule is poled by an electrical field during its vapor deposition polymerization (VDP) process. The polymer, used as a matrix, was semi-flexible, highly transparent polyimide, 6FDA-ODA (6F-dianhydride-4, 4'-oxydianiline). The NLO-active molecule studied was DR1(Disperse Red 1). Second harmonic generation (SHG) was measured to investigate the nonlinear optical property of the polymer thin film. The SHG coefficient increased with the increase of the volume fraction of DR1 in the polymer film and the SHG signal was maximum when the volume fraction of DR1 was 36%. The film prepared under such conditions exhibited optimal nonlinear stability. Curing the thin film at a moderately high temperature had greatly improved the film's integrity. The primary degradation behavior was identified to be hydrolysis of the thin film, which led to the reduction in the NLO intensity.

並列關鍵字

Real-time poling ； Vapor deposition polymerization ； Semi-flexible polyimide ； Guest-host type nonlinear optical polymer thin film