Neodymium complexes in GaP separated by photoluminescence excitation spectroscopy

Implantation of neodymium (Nd) in GaP gives rise to a very complex spectrum of intra 4f-shell luminescence transitions involving a number of Nd defect associates. Using a tunable color center laser, photoluminescence excitation spectroscopy was employed to separate different Nd3+ complexes in GaP:Nd. Two dominant noncubic Nd centers are clearly identified which arise presumably from the association of Nd with radiation damage centers.