Efficient fully functionalized photorefractive polymethacrylates with infrared sensitivity and different spacer lengths
作者:Christiaan Engels、David Van Steenwinckel、Eric Hendrickx、Mark Schaerlaekens、André Persoons、Celest Samyn
DOI:10.1039/b102489m
日期:2002.3.21
A series of photorefractive polymethacrylates, containing a Disperse Red type chromophore and carbazole as charge transport agent with various spacer lengths, was synthesized and characterized. The photorefractive effect of these materials was studied by four-wave mixing and two beam-coupling at 780 nm after sensitization with 1 wt% TNFM. We have found a gain coefficient of Γ
= 140 cm−1 at an applied electric field of 60 V µm−1 and complete internal diffraction at an applied electric field of 52 V µm−1. For fully functionalized photorefractive polymers, these values rank among the highest reported up to date.
合成并表征了一系列含有分散红型发色团和咔唑作为电荷传输剂、具有不同间隔基长度的光折变聚甲基丙烯酸酯。在用 1 wt% TNFM 敏化后,通过四波混频和两束耦合在 780 nm 处研究了这些材料的光折变效应。我们发现增益系数为 Γ
= 140 cm−1 在施加 60 V µm−1 电场时,在施加 52 V µm−1 电场时完成内部衍射。对于全功能化的光折变聚合物,这些值位居迄今为止报道的最高值之列。