2ND-ORDER OPTICAL NONLINEARITY OF NEW 1,3,2(2H)-DIOXABORINE DYES

A series of novel 1,3,2(2H)-dioxaborine dyes, containing a wide number of substituents on the dioxaborine ring, have been synthesized. Using a modulated-intensity ellipsometric technique, we show first that the second-order non-linear optical properties of the dioxaborines are in fluenced strongly by the choice of substituent moiety. Secondly, we sh ow that the dioxaborines can exhibit sizeable non-linearities (mu beta values of 2345 x 10(-48) esu) coupled with high thermal stabilities ( 280 degrees C). These two factors, combined with the synthetic ease of dioxaborine derivatives, may make this class of chromophore promising for non-linear optical devices.