High-power electrically pumped terahertz topological laser based on a surface metallic Dirac-vortex cavity

Junhong Liu, Yunfei Xu, Rusong Li, Yongqiang Sun, Kaiyao Xin, Jinchuan Zhang (), Quanyong Lu (), Ning Zhuo, Junqi Liu, Lijun Wang, Fengmin Cheng, Shuman Liu, Fengqi Liu () and Shenqiang Zhai ()
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Junhong Liu: Chinese Academy of Sciences
Yunfei Xu: Chinese Academy of Sciences
Rusong Li: Beijing Academy of Quantum Information Sciences
Yongqiang Sun: Chinese Academy of Sciences
Kaiyao Xin: Chinese Academy of Sciences
Jinchuan Zhang: Chinese Academy of Sciences
Quanyong Lu: Beijing Academy of Quantum Information Sciences
Ning Zhuo: Chinese Academy of Sciences
Junqi Liu: Chinese Academy of Sciences
Lijun Wang: Chinese Academy of Sciences
Fengmin Cheng: Chinese Academy of Sciences
Shuman Liu: Chinese Academy of Sciences
Fengqi Liu: Chinese Academy of Sciences
Shenqiang Zhai: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract Topological lasers (TLs) have attracted widespread attention due to their mode robustness against perturbations or defects. Among them, electrically pumped TLs have gained extensive research interest due to their advantages of compact size and easy integration. Nevertheless, limited studies on electrically pumped TLs have been reported in the terahertz (THz) and telecom wavelength ranges with relatively low output powers, causing a wide gap between practical applications. Here, we introduce a surface metallic Dirac-vortex cavity (SMDC) design to solve the difficulty of increasing power for electrically pumped TLs in the THz spectral range. Due to the strong coupling between the SMDC and the active region, robust 2D topological defect lasing modes are obtained. More importantly, enough gain and large radiative efficiency provided by the SMDC bring in the increase of the output power to a maximum peak power of 150 mW which demonstrates the practical application potential of electrically pumped TLs.

Date: 2024
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DOI: 10.1038/s41467-024-48788-y

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