Department of Applied Physics, Aalto University, P.O. Box 13500, FI-00076 Aalto, Finland.
Opt Lett. 2010 Jun 1;35(11):1813-5. doi: 10.1364/OL.35.001813.
We present a novel materials concept for optical inscription of stable birefringent optical elements into guest-host type polymers by making use of chromophore aggregation. The method is based on photoalignment of azobenzene chromophores, the aggregation of which leads to significant enhancement and stabilization of the photoinduced birefringence. The obtained order parameter of the molecular alignment (0.3) in combination with the exceptional thermal stability of the anisotropy renders the material system unique among amorphous azobenzene-containing polymers and provides a route toward designing efficient photoresponsive optical elements through the guest-host type approach.
我们提出了一种新颖的材料概念，通过利用生色团聚集，将稳定的双折射光学元件写入主体-客体型聚合物中。该方法基于偶氮苯生色团的光取向，其聚集导致光致双折射的显著增强和稳定。所获得的分子取向的有序参数（0.3）与各向异性的异常热稳定性相结合，使该材料系统在无定形含偶氮苯聚合物中独一无二，并为通过主体-客体型方法设计高效光响应光学元件提供了一种途径。
