INVESTIGATION OF IRON RELATED ZERO PHONON LINES IN INP FE USING THE MAGNETIC CIRCULAR-DICHROISM OF OPTICAL-ABSORPTION

The magnetic circular dichroism of optical absorption (MCDA) is used t o investigate zero-phonon (ZP) lines and related phonon sidebands in I nP:Fe. The two known charge states of Fe in InP are Fe2+ and Fe3+. Mea surements of the optical transitions in InP:Fe reveal a remarkable hig h number of ZP lines due to crystal-field and spin-orbit splitting of the Fe2+ level. We present for the first time highly resolved MCDA spe ctra of the ZP charge transfer transitions from Fe3+ to the 5E and 5T2 manifold of Fe2+. Using the tagged-MCDA technique we are able to conf irm the assignement of the ZP lines to Fe3+.