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Figure 3 | EPJ Quantum Technology

Figure 3

From: A biocompatible technique for magnetic field sensing at (sub)cellular scale using Nitrogen-Vacancy centers

Figure 3

Lock-in spectrum with excitation of a single resonance (a) and simultaneous excitation of the three resonances separated by the hyperfine coupling (b). The insets shows the central linear zone and the value b of the slope the curve. b represents the figure of merit of the curve. The simultaneous excitation of the three resonances results in an improvement of b of a factor ≈ 1.5

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