Lead halide perovskite nanowires (NWs) have been demonstrated in pulsed lasing with high quantum yields, low thresholds, and broad tunability. However, continuous‐wave (CW) lasing, necessary for many optoelectronic applications, has not been achieved to date. This is thought to be due to many‐body screening, which reduces the excitonic resonance enhancement of the oscillator strength at high excitation densities necessary for population inversion. Here CW lasing in CsPbBr₃ perovskite NWs is reported. Analysis of the cavity modes and their temperature dependence reveals that both CW and pulsed lasing originate from polariton modes near the bottleneck region on the lower polariton branch, with a vacuum Rabi splitting of 0.20 ± 0.03 eV. These findings suggest that lead halide perovskite NWs may serve as low‐power CW coherent light sources and as model systems for polaritonics in the strong‐coupling regime.

中文翻译：

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溴化铯铅钙钛矿纳米线中的连续波激光发射

卤化钙钛矿铅纳米线（NWs）已在脉冲激光中得到证明，具有高量子产率，低阈值和广泛的可调性。但是，迄今为止，尚未实现许多光电应用所需的连续波（CW）激光。人们认为这是由于多体筛选，它在总体反转所需的高激发密度下降低了振子强度的激子共振增强。CsPbBr _3中的CW激光发射钙钛矿净水的报道。对腔模及其温度依赖性的分析表明，连续波和脉冲激射均来自下极化子分支瓶颈区域附近的极化子模式，真空拉比分裂为0.20±0.03 eV。这些发现表明，卤化钙钛矿型纳米线可以用作低功率连续波相干光源，并且可以用作强耦合体系中极化子的模型系统。