ABSTRACT
Organic crystals exhibiting second-order optical nonlinearities present an alternative to inorganic ferroelectric crystals, such as lithium niobate (LiNbO3), potassium niobate (KNbO3), etc., and III-V semiconductor materials, for linear electro-optic (EO) modulation employing the Pockels eŸect. Considering the fundamental material response, organic crystals oŸer advantages similar to those of poled-polymer systems, for example, a low dielectric dispersion and therefore the possibility to match the optical and radio frequency electric-˜eld velocities in the material, which is promising for high-speed EO modulation with modulation bandwidths well beyond 100 GHz. On the other hand, fabrication and processing of organic crystals for optical waveguides needs diŸerent approaches than those used for polymers and inorganic materials.
