VIBRATIONAL-MODE FOR NITROGEN IN ZINC SELENIDE

The first observation of a localized vibrational mode for N in ZnSe by infrared absorption is reported. Nitrogen was introduced into internal reflection plates of polycrystalline ZnSe by ion implantation. Isotopic substitution confirmed assignment of the absorption to N, and the band frequency is consistent with N on Se sites. Coimplantation with deuterium decreased the N band intensity and introduced a band for Zn-D. These deuterium effects which increase upon annealing between 200 and 300-degrees-C are ascribed to a breaking of Zn-N bonds to form Zn-D bonds and a relaxation of N toward threefold coordination.