Figure 1
(i) Measured XAFS spectra of (a) Er-doped GaP (thin solid line), (b) Er- and O-doped GaAs (dotted line) and (c) Er-doped InP (bold solid line) at the Er LIII edge. (ii) Measured XAFS spectra of (d) GaP (thin solid line), (e) GaAs (dotted line) and (f) InP (bold solid line) at the Er LIII edge. |