STUDY OF PROPERTIES AND STRUCTURAL FEATURES OF SOME NEW ORGANIC AND ORGANOMETALLIC NONLINEAR-OPTICAL CRYSTALS

Certain organic crystals have attracted much attention owing to their nonlinear optical coefficients, at least one to two orders of magnitud e above those of inorganic nonlinear optical materials. However, none of them has so far actually been applied in frequency conversion devic es used with high-, medium- or low-power lasers. In this article we di scuss the major factors affecting frequency conversion efficiency and examine the characteristics of some frequently mentioned organic cryst als. The properties and structure characterization of a new type of no nlinear optical crystal are also reported and discussed.