ODMR excitation spectroscopy in GaP

Abstract
Photoluminescence excitation (PLE) spectra taken in the ODMR mode with tunable laser excitation are discussed. Experimental data are shown for the 1.911 eV Cu-related defect-bound exciton in GaP, illustrating the power of this ODMR-PLE technique in establishing the important connection between an ODMR signal and the defect state experiencing the microwave resonance.