The site and site symmetry of Er3+ in LPE grown In0.5Ga0.5P have been
investigated for the first time through Raman and polarized luminescen
ce spectroscopic techniques. The Er3+ Site was found to be Er-In in In
0.5Ga0.5P. The site symmetry of Er3+ in In0.5Ga0.5P was positively con
firmed as C-2 upsilon.