Active broadband polymer stabilized liquid crystals

We consider the realization and the electro-optical behaviour of a polymer network stabilized liquid crystal whose reflection band has been broadened. We particularly emphasize the reflective properties (mean value of the sel ective reflection and bandwidth, and the parameters of broadening) and thei r evolution with voltage. Broadband active films can be obtained under spec ial conditions of polymerization. A mechanism concerning the broadening of the reflection band is put forward based on inhomogeneous consumption of a chiral monomer within the samples.