Figure 1
(a) Pulsed-ODMR spectrum of NV centers acquired at a MW power of 14.3 dBm and a MW π-pulse duration of 1 μs, with a static magnetic field B0 = 4.6 mT aligned along the [111] direction. The two black arrows indicate the transitions \(\left|0\right\rangle \) → \(\left|\pm 1\right\rangle \) correspondent to the [111] direction used in this experiment to perform the MW magnetic field imaging. The two inner resonance peaks correspond to the other three possible orientations of the symmetry axis of the NV centers. The inset shows a zoom of the peak at 3.010 GHz which shows a splitting associated with the hyperfine interaction of 15N nuclear spin at a MW power of 9.3 dBm and a MW pulse duration of 1.5 μs. (b) Experimental setup used for the excitation of the resonator and the imaging of the MW magnetic field distribution. The green laser at λ = 520 nm is focused through an objective lens 100 × on the NV layer. (c–e) Sketches of the lumped resonators in the xy-plane that we measured with our system. The zoomed insets show the area of the patterns over which we performed the MW imaging. (f) Pulse sequence used to measure the Rabi oscillations of the electron spin.
