Fig. 5
From: The role of momentum-dark excitons in the elementary optical response of bilayer WSe2
Quantum dots in bilayer WSe2. a False-color plot of quantum dot magneto-luminescence under σ+ (σ−) polarized excitation for positive (negative) magnetic fields in Faraday geometry. b The quantum dot emission doublet (upper panel) is characterized by linearly polarized peaks with orthogonal polarization axes (lower panel; note the anti-correlation in the intensities of the higher- and lower-energy peaks shown in red and blue together with squared sine and cosine fits). c Energy dispersion of the doublet splitting Δ in magnetic field. Best fit to the data with a hyperbolic function (solid line) was obtained for a zero-field fine-structure splitting Δ0 of 500 μeV and an exciton g-factor of 9.5. d Distribution of exciton g-factors around the mean value of 9.5 plotted for ten quantum dots with respect to their zero-field splitting
