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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: Ground-State Depletion Nanoscopy of Nitrogen-Vacancy Centres in Nanodiamonds

Fig. 2

a The fluorescence of a single \({\text{NV}}^{ - }\) centre based on 488 nm and 638 nm excitation. The detected fluorescence increases when both lasers simultaneously excite the \({\text{NV}}^{ - }\) centre. b Fluorescence dependence on depletion power. An illustration of the pulse sequence is shown in the inset. Fluorescence is detected only when the probe laser at 594 nm is on. c Antibunching curve of the \({\text{NV}}^{ - }\) centre showing a second-order correlation function < 0.5 a zero-delay time

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