论文标题
室温下亚微米单粒子钙钛矿等离子体纳米剂
Sub-micron single-particle perovskite plasmonic nanolasers at room temperature
论文作者
论文摘要
等离子体纳米仪在综合光子学，光学传感和生物医学成像中的有希望的应用中引起了极大的兴趣。迄今为止，由于高金属损失，在各个维度上的亚sibsicron（在各个维度上的亚微米）仍然难以捉摸。在这里，我们在室温下在聚合物涂层的金底物上表现出具有全含量的溴化溴化物钙钛矿（CSPBBR3）晶体，在2.3 eV左右展示了单粒子激光。总共有大量设备（〜100），我们系统地研究了等离子测试和光子对照组的激光作用。实现的最小等离子激光器为0.56千分尺x 0.58千分尺x 0.32千分尺，比我们最小的光子激光器小十倍。有效的等离激子激光的关键要素通过percell效应，较长的载体扩散，大的自发发射因子和高组指数确定为增强的光学增益。我们的结果揭示了等离激光激光器的三维微型化。
Plasmonic nanolasers have received a substantial interest for their promising applications in integrated photonics, optical sensing, and biomedical imaging. To date, a room-temperature plasmonic nanolaser, submicron in all dimensions, remains elusive in the visible regime due to high metallic losses. Here, we demonstrate single-particle lasing around 2.3 eV with full-submicron, cesium lead bromide perovskite (CsPbBr3) crystals atop polymer-coated gold substrates at room temperature. With a large number (~100) of devices in total, we systematically study the lasing action of plasmonic test and photonic control groups. The achieved smallest plasmonic laser was 0.56 micrometer x 0.58 micrometer x 0.32 micrometer in size, ten-fold smaller than that of our smallest photonic laser. Key elements to efficient plasmonic lasing are identified as enhanced optical gain by the Purcell effect, long carrier diffusivity, a large spontaneous emission factor, and a high group index. Our results shed light on three-dimensional miniaturization of plasmonic lasers.
