Growth, optical and electro-optical characterisations of potassium hydrogen phthalate crystals doped with Fe³⁺ and Cr³⁺ ions

Potassium hydrogen crystals have good electro-optic properties that are in order of urea crystal. Trivalent ions doped KAP crystals KAP:M+3 (M = Fe3+, Cr3+) ions were grown using solution growth technique. Optical and electro-optical characterisations on the coefficient r51 were carried out. The refractive matching offered by the KAP:M+3 crystals was investigated. One of the factors causing the observed enhancement in the electro-optics properties is the ligand interactions due the presence of trivalent ions in KAP lattice. © 2004 Elsevier B.V. All rights reserved.