Abstract

The main purpose of this work was the determination of the composition of a KY 1-x-y Gd x Lu y (WO 4 ) 2 layer grown by liquid phase epitaxy (LPE) technique on KY(WO 4 ) 2 substrate having enough refracave index contrast and appropriate lattice mismatch (f hkl ) to act as planar waveguides. To achieve this we have grown KY 1-x-y Gd x Lu y (WO 4 ) 2 single crystals by the flux method and characterized them in terms of chemical composition, structure and refractive indices. A high quality epitaxial layer of KY 0.58 Gd 0.22 Lu 0 . 20 (WO 4 ) 2 with a thickness of 10 μm was grown on a b oriented KY(WO 4 ) 2 substrate by LPE. At λ = 632.8 nm this planar waveguide can support five and four guided modes along the N g and N m directions, respectively and five TM modes along N p direction.

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