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High-power electrically pumped terahertz topological laser based on a surface metallic Dirac-vortex cavity
Junhong Liu1,2, Yunfei Xu1,2, Rusong Li3
1Laboratory of Solid-State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China.
Nature Communications
|May 24, 2024
Summary
Electrically pumped topological lasers (TLs) now offer higher output power. A novel surface metallic Dirac-vortex cavity (SMDC) design achieves 150 mW peak power in the terahertz range, boosting practical applications.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
- Materials Science
Background:
- Topological lasers (TLs) exhibit robust mode properties against perturbations.
- Electrically pumped TLs are desirable for compact and integrated devices.
- Existing terahertz (THz) electrically pumped TLs suffer from low output power, limiting applications.
Purpose of the Study:
- To enhance the output power of electrically pumped topological lasers in the THz spectral range.
- To introduce a novel cavity design for improved performance.
Main Methods:
- Design and implementation of a surface metallic Dirac-vortex cavity (SMDC).
- Investigation of strong coupling between the SMDC and the active laser region.
- Characterization of topological defect lasing modes and output power.
Main Results:
- Robust 2D topological defect lasing modes were achieved.
- The SMDC design significantly increased output power.
- A maximum peak output power of 150 mW was demonstrated.
Conclusions:
- The developed SMDC design effectively addresses the low output power limitation in THz electrically pumped TLs.
- The high output power indicates significant potential for practical applications of these devices.
