Ferroelectric domains have been observed and characterized in hydrothermally grown KTiOPO4 and a poling process developed. The electro-optic, pyroelectric, and second-harmonic generation characteristics of multidomain crystals before and after poling are described and compared to single domain crystals.

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A detailed infrared study has identified the spectral features of potassium titanate orthophosphate, KTiOPO4 (KTP), between 4000 and 2200 cm−1. KTP single crystals grown by hydrothermal and flux methods were examined. By using ordinary and heavy water in separate runs to grow KTP crystals hydrothermally, features that depend on the presence of H2O or D2O in the growth process have been distinguished from features that do not. The effect of multiple OH sites in KTP has been linked with crystal quality and specific trace impurities, e.g., Fe+3.

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A new, fully ab initio investigation of the ArNO (X 2 Π) system. II. Bound states of the Ar-NO complex