Freire-Fernández Francisco, Sinai Nathan G, Hui Tan Max Jin, Park Sang-Min, Koessler Eric Rodolfo, Krauss Todd, Huo Pengfei, Odom Teri W
Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.
Department of Chemistry, University of Rochester, Rochester, New York 14627, United States.
ACS Nano. 2024 Jun 11;18(23):15177-15184. doi: 10.1021/acsnano.4c03164. Epub 2024 May 29.
This paper reports how CdSe core-only nanoplatelets (NPLs) coupled with plasmonic Al nanoparticle lattices can exhibit exciton-polariton lasing. By improving a procedure to synthesize monodisperse 4-monolayer CdSe NPLs, we could resolve polariton decay dynamics and pathways. Experiment and theory confirmed that the system is in the strong coupling regime based on anticrossings in the dispersion diagrams and magnitude of the Rabi-splitting values. Notably, polariton lasing is observed only for cavity lattice periodicities that exhibit specific dispersive characteristics that enable polariton accumulation. The threshold of polariton lasing is 25-fold lower than the reported photon lasing values from CdSe NPLs in similar cavity designs. This open-cavity platform offers a simple approach to control exciton polaritons anticipated to benefit quantum information processing, optoelectronics, and chemical reactions.
本文报道了仅含CdSe的纳米片（NPLs）与等离子体Al纳米颗粒晶格耦合时如何展现激子极化激元激光发射。通过改进合成单分散4单层CdSe纳米片的方法，我们能够解析极化激元的衰减动力学和路径。实验和理论证实，基于色散图中的反交叉和拉比分裂值的大小，该系统处于强耦合 regime。值得注意的是，仅对于具有特定色散特性从而能够实现极化激元积累的腔晶格周期性，才会观察到极化激元激光发射。在类似腔设计中，极化激元激光发射的阈值比报道的CdSe纳米片的光子激光发射值低25倍。这个开放腔平台提供了一种控制激子极化激元的简单方法，有望为量子信息处理、光电子学和化学反应带来益处。
