Ultrafast Optical Properties of Cavity-Enhanced Superfluorescence

作者：Zhong, Yichi; Zhou, Chun; Hou, Luyang; Li, Jingzhou; Xie, Wei^*; Dong, Hongxing^*; Zhang, Long^*

来源：Advanced Optical Materials, 2022, 10(7): 2102290.

DOI：10.1002/adom.202102290

• cavity-enhanced superfluorescence
• perovskite nanostructures
• self-assembly
• superlattice
• ultrafast optical

Cavity-enhanced superfluorescence is an ultrafast and intense lasing produced by strong interaction between superfluorescence and optical cavity. However, due to the quite difficulty of particle cooperative emission in solid-state systems, and the low coupling efficiency between superfluorescence and optical cavity, research on ultrafast optical properties of cavity-enhanced superfluorescence is thus far in its infancy. Fortunately, perovskites being made into quantum dot superlattice microcavity is an excellent candidate as such light source. This work reveals the time-dependent redshift process of cavity-enhanced superfluorescence under high-power injection, and interprets the physical mechanism of lasing broadening with increasing power from the dynamic perspective. At the same time, the multi-mode lasing dynamic photoluminescence image output at different times is also tracked. The short-wavelength resonance mode has a lower stimulated threshold, but its radiation lags behind the long-wavelength resonance mode by 4 ps in high excited density. These ultrafast optical property researches may promote the application of quantum dot superlattices in information technology, optical communications, ultrafast lasers, and other fields.

• 单位
  中国科学院; 中国科学院研究生院; 上海大学