The energy level separation between the edge states in topological insulator quantum dots lies in the terahertz (THz) range. Quantum confinement ensures the nonuniformity of the energy level separation near the Dirac point. Based on these features, we propose that a topological insulator quantum dot array can be operated as an electrically pumped continuous-wave THz laser. The proposed device can operate at room temperature, with power exceeding 10 mW and quantum efficiency reaching ∼50%. This study may promote the usage of topological insulator quantum dots as an important source of THz radiation.

中文翻译：

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基于拓扑绝缘子量子点阵列的电泵太赫兹激光器

拓扑绝缘子量子点的边缘状态之间的能级间隔位于太赫兹（THz）范围内。量子限制确保了狄拉克点附近能级分离的不均匀性。基于这些特征，我们建议可以将拓扑绝缘体量子点阵列用作电泵浦连续波THz激光器。拟议中的设备可以在室温下工作，功率超过10 mW，量子效率达到〜50％。这项研究可能会促进拓扑绝缘体量子点作为太赫兹辐射的重要来源的使用。