Optically detected magnetic resonance study of thermal effects due to absorbing environment around nitrogen - vacancy - nanodiamond powders

Fig. S1 shows acquired luminescence spectra, and inset shows amplitudes of the NV0, NV¬− peaks and their ratios NV−/NV0 obtained from the average of ten PL spectra for Fe-ions implanted in ND (ND14 and ND15). Figs. S2(a) and S2(b) present the results of measurements of the spin-lattice and spin-spin relaxation times, T1 and T2 for various Fe-ion implanted doses. Fig. S3 shows the ODMR spectra and the central resonance frequencies after annealing ND14 and ND15. The ODMR signals are collected (a, b) at a laser power of 65 mW at various MW powers and (c, d) with a MW power of -20 dBm at various laser powers.