Plasmonic nanolaser holds great potential in breaking down the diffraction limit of conventional optics to the deep sub‐wavelength regime and in ultrafast lasing dynamics. However, plasmonic laser devices are constrained in practical applications due to their high cost and high thresholds. All‐inorganic cesium lead halide perovskites are promising solutions for their excellent optical gain properties and high emission efficiency. In this work, high‐quality single‐crystalline CsPbBr₃ perovskite nanowires (NWs) are synthesized by chemical vapor deposition method. The plasmonic lasing is achieved from the CsPbBr₃ nanowire based plasmonic devices with lasing threshold down to ≈6.5 µJ cm⁻² at room temperature. The highly polarized emission parallel to nanowire axis and polarization‐sensitive pump response confirm the plasmonic characteristic in these devices. Furthermore, time‐resolved photoluminescence study suggests that the radiative recombination lifetime of CsPbBr₃ NW is shortened by a factor of ≈6.14 due to Purcell effect. The lasing threshold of plasmonic device increases along with the nanowire length, indicating greater potential in small size and integration in plasmonic device than its photonic counterparts. The results not only provide a solution to fabricate low‐cost nanowire based plasmonic lasers, but also advocate the prospect of all‐inorganic perovskite nanowires as promising candidates in plasmonic‐based devices.

中文翻译：

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全无机CsPbBr3纳米线等离子激光器

等离子体纳米激光在打破常规光学器件到深亚波长范围的衍射极限以及超快激光动力学方面具有巨大潜力。然而，由于等离子激射装置的高成本和高阈值，其在实际应用中受到限制。全无机卤化铯铯钙钛矿具有出色的光学增益特性和高发射效率，是有前途的解决方案。在这项工作中，通过化学气相沉积法合成了高质量的单晶CsPbBr ₃钙钛矿纳米线（NWs ）。等离子体激射是通过基于CsPbBr ₃纳米线的等离子体激元实现的，其激射阈值低至≈6.5 µJ cm ^-2。在室温下。平行于纳米线轴的高极化发射和对极化敏感的泵浦响应证实了这些设备中的等离子体特性。此外，时间分辨的光致发光研究表明，由于珀塞尔效应，CsPbBr ₃ NW的辐射重组寿命缩短了约6.14倍。等离子装置的发射阈值随纳米线长度的增加而增加，这表明与等离子装置相比，等离子装置在小尺寸和集成方面的潜力更大。结果不仅为制造低成本的基于纳米线的等离激元激光器提供了解决方案，而且还提倡了全无机钙钛矿纳米线在基于等离激元的设备中的应用前景。