Fig. 4
From: All-optical control and super-resolution imaging of quantum emitters in layered materials
Calculation of the fluorescence profile for the emitter under different laser excitations. a, b Cross-section profile of a single emitter a and two closely positioned emitters b excited with a Gaussian beam. c, d Cross-section profile of a single emitter c and two closely positioned emitters d excited with a doughnut beam. The blue (orange) lins correspond to emitters treated as two- (three-) level systems. The green line refers to the case where a second repumping laser is added—with Gaussian a, b and doughnut c, d profile, respectively. In a–d, the xaxis represents the Rayleigh criterion so that the distance between max and min of the doughnut is 1. The vertical dashed lines indicate the position of the emitter along the xaxis
