Figure 4
From: Nitrogen implantation with a scanning electron microscope

Line composed of NV centres. (a) Fluorescence image of a spot where one of the openings of the PMMA mask has been (back side of the sample). At the former location of the opening numerous NV centres have been created, whose fluorescence signal is clearly visible against the background. (b) Averaged fluorescence along the cross section of the line shown in (a) and the surrounding background.