Fig. 3
From: A room temperature continuous-wave nanolaser using colloidal quantum wells
Observation and characterization of nanoplatelet lasing. a Emission spectra from nanoplatelets coupled to the cavity under different pump powers. Symbols indicate the measured data, and the lines are Lorentzian fits. Keys are pump powers for corresponding spectra in the same colours. b Output intensity, determined from the Lorentzian fits, as a function of the total pump power. Red squares are measured data, and the solid curve is a fit to the laser rate equation, corresponding to a spontaneous emission coupling efficiency β = 0.81. Dashed curves are calculation results for other values of β. c Cavity linewidth as a function of pump power. The vertical dashed line (orange) in both (b) and (c) indicates the lasing threshold obtained from the fit. d Output intensity after subtracting a linear fit to the data points below threshold. The solid curve is the fit to the laser rate equation, and dashed curves are calculated for other values of β
