2ND-ORDER OPTICAL NONLINEARITIES OF AZO CHROMOPHORES COVALENTLY ATTACHED TO A SOL-GEL MATRIX

Optically nonlinear disperse red 1 (DR1) was covalently bound into a s ilica gel network by the coupling of DR1 and 3-isocyanatopropyltrietho xysilane. Organic-inorganic hybrid materials present a large resonant second-order susceptibility (d(33) = 55 pm/V for a fundamental wavelen gth of 1.06 mu m) with an excellent room-temperature stability.