Why am I getting additional absorption peak (bump and valley kind of structure) in GaAs sample implanted with 50 keV silicon ion ?

We have implanted 50 keV silicon ion with fluence of 5e15 ion cm-2 in GaAs sample. The UV-Vis graph (alpha2 Vs. photon energy) showed additional absorption peak (between 1.35 eV to 1.37 eV ). What...

13 December 2018 7,840 3 View