Scaling Laws for Perovskite Nanolasers With Photonic and Hybrid Plasmonic Modes

• Published in: Advanced optical materials Vol. 10; no. 19
• Main Authors: Huang, Zhen‐Ting, Chen, Jia‐Wei, Li, Heng, Zhu, Yizhi, Cui, Qiannan, Xu, Chunxiang, Lu, Tien‐Chang
• Format: Journal Article
• Language: English
• Published: 01.10.2022
• Subjects: nanolasers; nanowire; perovskites; scaling laws; surface plasmons
• ISSN: 2195-1071; 2195-1071
• DOI: 10.1002/adom.202200603

Surface plasmons exhibit an extraordinary capability to reduce the structural size and improve light−matter interaction. However, for small‐sized plasmonic cavities, the optical diffraction limit makes the near‐field difficult to observe, complicating the analysis of exact lasing characteristics. In this study, a 4f measurement system is used to extract the mode parity from the interference pattern and reconstruct the near‐field of the hybrid plasmonic perovskite nanolasers. In conjunction with other measurements, a series of rigorous methods for determining the exact resonance mode and obtaining the precise lasing characteristics of perovskite nanolasers are described. By applying these methods, the scaling laws for wire‐type hybrid plasmonic perovskite lasers are successfully determined and an appropriate size is selected for achieving outstanding lasing performance with low threshold power consumption and a high group index. These methods can be applied to nanowire plasmon‐based lasers to advance the development of plasmonic devices. A rigorous method to construct the near‐field and scaling law of plasmonic perovskite nanolasers is proposed. A 4f system is used to measure the angle‐resolved interference pattern, and the mode parity can be extracted from interference fringes, which is significant for identifying the lasing mode. This is the first observation of plasmonic modes resonating in the small cavity.