Fig. 5: Lasing versus non-lasing EPs.
From: Tracking exceptional points above the lasing threshold
Experimental (top row) and theoretical (lower row) results for accessing EP below and above the lasing threshold. In these figures, P1 is kept constant and P2 is varied. a Ptot < 2P0 ensures that the EP can be accessed only below the lasing threshold, as evidenced by the self-termination that takes place as P2 /P1 is increased. b Ptot > 2P0 to ensure that the EP can be accessed above the lasing threshold. Here we observe mode switching without any self-termination effects. In all the figures, the color maps are presented in log scale for clarity. c and d display the simulation results, which are in good agreement with the experiments.
