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 interna l reflection plates of polycrystalline ZnSe by ion implantation. Isoto pic substitution confirmed assignment of the absorption to N, and the band frequency is consistent with N on Se sites. Coimplantation with d euterium decreased the N band intensity and introduced a band for Zn-D . These deuterium effects which increase upon annealing between 200 an d 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.