Figure 4.
(a) Artistic illustration of the coupled WSe2 monolayer single-photon emitter on the Si3N4 waveguide. The 2D emitter is excited with a continuous-wave (cw) laser coupled to the waveguide. The emitted signal is detected from the top through a microscope objective. (b) Resonance fluorescence (RF) spectrum of emitter 2 and residual laser in a semilogarithmic plot. (c) Second-order autocorrelation measurement under resonant excitation through the waveguide and detection from the top showing clear single-photon emission. Inset: Same measurement for a longer time window showing bunching originating from spectral diffusion.