Frenkel pairs on the two sublattices of ZnTe

Study of the polarization of a dominant 1.0 mu m photoluminescence band pro duced by 2.5 MeV electron irradiation of ZnTe in situ at 4.2 K reveals it t o arise from a Frenkel pair produced on the Zn sublattice. Optical detectio n of electron paramagnetic resonance (ODEPR) studies reveal Frenkel pairs o n the Te sublattice. All Fairs disappear in various annealing stages from 3 5 K to 120 K. The Te-sublattice pairs can also be made to disappear by opti cal injection at 1.5 Ii. Deconvoluting the Te interstitial contribution to the S = 1 ODEPR spin Hamiltonian parameters leads to a model for it as Te-i (-) which is only slightly distorted off-center from a T-d interstitial sit e. The distortion, viewed as partially of Jahn-Teller origin, provides a lo gical explanation for its optically induced migration.