ABSTRACT
In order to design Electro-Optic polymer wires, the molecular orbital (MO) method is used. The MO can be expressed as linear combinations of wavefunctions in atoms. Morley reported that molecular second-order nonlinear susceptibility increases with the chain length in polyenes with donor–acceptor substitution at the chain ends. The one-dimensional characteristics are favorable for efficient electronic polarization induced by an electric field in the wire direction. This is why organic materials seem promising for nonlinear optical devices. The enhancement of optical nonlinearities is found by A. Matsuura in conjugated wire models with poly-AM backbones. The uniformity of the conjugated length in materials is essential in sharpening. Research on artificial materials, like phenylenediamine, poly-AM or other conjugated systems with multiple quantum dots, has far-reaching consequences. Bound excitons or exciton confinement in quantum dots in one-dimensional conjugated systems may be another way to sharpen absorption bands.
