MEASUREMENT OF 2ND-HARMONIC GENERATION FROM COLORED POWDERS

The second-harmonic generation with evanescent wave technique was used to measure the efficiency of second-harmonic generation of an organic colored powder that absorbs the second-harmonic wave, and it was comp ared to the electro-optic coefficient. The refractive index of the sam ple at the second-harmonic frequency is complex. The effective refract ive index was obtained by measuring reflectivity at the interface betw een the sample and the prism. This technique is potentially useful for surveying electro-optic materials.