Fig. 4: Nearly Auger-free stimulated emission (StE).
From: Ultrashort laser pulse doubling by metal-halide perovskite multiple quantum wells
a Normalized time-resolved photoluminescence (TRPL) decay curves of the perovskite MQWs film pumped below the StE threshold fluence (Ith) of 26 μJ cm−2. b 2D pseudocolor plot of normalized TRPL intensity monitored at the emission peak of gain transitions in MQWs film under different pump fluences. c Normalized TRPL decay curves of the 3D perovskite film pumped below the StE Ith of 45 μJ cm−2. d 2D pseudocolor plot of normalized TRPL intensity monitored at the emission peak of gain transitions in 3D perovskite film under different pump fluences. The white arrows indicate the position of the threshold pump fluence of StE.
