Abstract

The developments of novel materials having large third-order nonlinear optical susceptibility χ⁽³⁾ and fast response give a considerable interest as the key subjects for future optoelectronic technology. It was proved in former researches that the large low dimensional delocalization field for optically excited electron is effective for large χ⁽³⁾ value. Third-order optical nonlinearities of many materials, mainly inorganic semiconductors or organic conjugated polymers, have been investigated. Many inorganic materials have studied for their large χ⁽³⁾ and thermal stability. On the other hands, organic nonlinear optical materials also have been noted, because they have advantages of fast optical response, architectural flexibility and ease of fabrication.

© 1997 Optical Society of America