OPTICAL-DETECTION OF MAGNETIC-RESONANCE OF THE ZINC VACANCY IN ZNSE VIA MAGNETIC CIRCULAR-DICHROISM

We report a study of the isolated zinc vacancy (V(Zn)) in ZnSe using o ptical detection of magnetic resonance (ODMR) via magnetic circular di chroism (MCD) in absorption. Three MCD bands associated with V(Zn)- ar e observed at 1.0, 1.4, and 2.65 eV. The 1.4- and 2.65-eV bands have p reviously been observed by stress-induced linear dichroism studies. De tection of the band at 1.0 eV provides important confirmation of a pre viously proposed molecular orbital model for the defect. The MCD-ODMR signals are absorption-like and disappear for the applied magnetic fie ld along the defect axis. This unusual behavior is explained by calcul ating the dipole transition probabilities of the MCD transitions using this model, but expanded to include spin-orbit interaction.