NONLINEAR OPTICAL ELEMENT

摘要

A third-order nonlinear optical element (11) showing wide employable wave-length range of input light, high speed operation and low light intensity of input light is disclosed. The third-order nonlinear optical element (11) of the present invention has at least two substantially optically smooth surfaces and comprise a charge-transfer complex consisting essentially of (i) at least one electron-accepting component selected from the group consisting of cyano compounds, quinones, nitro compounds, acid anhydride, halogenes, and halogenated carbons; and (ii) at least one electron-donating component selected from the group consisting of unsaturated cyclic hydrocarbon compounds, unsaturated heterocyclic compounds, chalcogen-containing compounds, quarternary unsaturated heterocyclic compounds and metals. The charge-transfer complex of nonlinear optical element (11) of the present invention is formed of said at least one electron-accepting component and said at least one electron-donating component in the ground state and at least one of said components is an organic compound having pi -conjugated system.