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.

图S1展示了所获取的荧光光谱，插入图中显示了NV0、NV¬−峰及其比率NV−/NV0的幅度，这些数据是通过平均十个PL光谱获得的，PL光谱是针对在ND（ND14和ND15）中植入的Fe离子所测得。图S2(a)和S2(b)展示了不同Fe离子植入剂量下，自旋-晶格和自旋-自旋弛豫时间T1和T2的测量结果。图S3展示了在退火ND14和ND15后的ODMR光谱及其中心共振频率。ODMR信号在激光功率为65 mW的情况下，在不同的微波功率下被收集（a, b），以及在微波功率为-20 dBm的情况下，在不同的激光功率下被收集（c, d）。