Interpenetrating Polymer Network as a Stable Second Order Nonlinear OpticalMaterial. (Reannouncement with New Availability Information)

摘要

Polymeric materials with second order nonlinear optical (NLO) properties are ofmuch interest for applications such as waveguide electrooptic modulation and frequency-doubling devices. The alignment of NLO chromophores in the poled polymers must be sufficiently stable at ambient temperature in order to use them in practical devices. Different approaches to improve the temporal stability have been reported by a number of investigators. Crosslinking reactions have been employed to enhance the stability of second order NLO properties in several poled polymer systems. The resulting crosslinked network has a higher glass transition Tg and a denser matrix, which reduce the mobility of the polymer chains. These features prevent the aligned NLO chromophores from relaxing to a random orientation. However, slow decay of second order NLO properties at elevated temperatures was still observed in the polymers. In this paper, we present a novel approach to achieve a stable second-order NLO polymer by incorporating NLO moieties into a full interpenetrating polymer network.... Nonlinear optical polymer, Interpenetrating polymer network.