Abstract
A new method has been applied to form Cd<SUB>u</SUB>Zn<SUB>1</SUB>-<SUB>u</SUB>Se waveguides -- ion exchange in the melts of salts. The regularities and specific features of ion exchange processes Cd<SUP>2+</SUP> yields Zn<SUP>2+</SUP> in ZnSe powder and single crystal plates have been studied. Cd<SUB>u</SUB>Zn<SUB>1</SUB>-<SUB>u</SUB>Se solid solution obeys the model of regular solution. Temperature dependencies of equilibrium constant and interaction energy of strained and unstrained Cd<SUB>u</SUB>Zn<SUB>1</SUB>-<SUB>u</SUB>Se solid solutions have been defined. We proposed the model taking into account the role of lattice misfit-induced stresses and dislocations in the ion exchange equilibrium. The depth profiles of elements and the refractive-index profiles in the ion exchanged Cd:ZnSE waveguides were analyzed and temperature dependencies of the self-diffusion coefficients of Cd<SUP>2+</SUP> and Zn<SUP>2+</SUP> ions were determined.
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