Surface plasmon enhanced strong exciton-photon coupling in hybrid inorganic-organic perovskite nanowires

• Main Authors: Shang, Qiuyu, Zhang, Shuai, Liu, Zhen, Chen, Jie, Yang, Pengfei, Li, Chun, Li, Wei, Zhang, Yanfeng, Xiong, Qihua, Liu, Xinfeng, Zhang, Qing
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2020
• Subjects: Science::Physics; Surface Plasmon; Strong Light−matter Interaction
• Online Access: https://hdl.handle.net/10356/139044
• Institution: Nanyang Technological University

Manipulating strong light-matter interaction in semiconductor microcavities is crucial for developing high-performance exciton polariton devices with great potential in next-generation all-solid state quantum technologies. In this work, we report surface plasmon enhanced strong exciton-photon interaction in CH3NH3PbBr3 perovskite nanowires. Characteristic anticrossing behaviors, indicating a Rabi splitting energy up to ∼564 meV, are observed near exciton resonance in hybrid perovskite nanowire/SiO2/Ag cavity at room temperature. The exciton-photon coupling strength is enhanced by ∼35% on average, which is mainly attributed to surface plasmon induced localized excitation field redistribution. Further, systematic studies on SiO2 thickness and nanowire dimension dependence of exciton-photon interaction are presented. These results provide new avenues to achieve extremely high coupling strengths and push forward the development of electrically pumped and ultralow threshold small lasers.