Zhu Liqing, Pan Yichun, Chen Linqi, Wang Zheng, Zhang Fangxin, Yang Guangran, Huang Changchang, Hu Wenping, Zhang Long, Zhang Yingjun, Dong Hongxing, Zhou Weihang
Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China.
Nano Lett. 2023 Sep 13;23(17):7797-7804. doi: 10.1021/acs.nanolett.3c01188. Epub 2023 Aug 17.
Symmetry plays an essential role in the fundamental properties of a physical system. In this work, we report on the realization of tunable single-mode polariton lasing from highly excited Rydberg states via symmetry engineering. By breaking the symmetry of the polaritonic wave function through potential wells and controlling the spatial overlap between the gain region and the eigen mode, we are able to generate single-mode polariton lasing, reversibly and dynamically, from quantized polariton states. Increasing the asymmetry of the potential well, single-mode lasing can be achieved even for the highly excited Rydberg state with a principle quantum number of = 14. Moreover, as a result of the excellent reservoir-eigen mode overlap and efficient spatial confinement, the threshold of lasing can be reduced up to 6 orders of magnitude, compared with those conventional pumping schemes. Our results present a new strategy toward the realization of thresholdless polariton lasing with dynamical tunability.
对称性在物理系统的基本性质中起着至关重要的作用。在这项工作中，我们报告了通过对称性工程从高激发里德堡态实现可调谐单模极化激元激光的情况。通过势阱打破极化激元波函数的对称性，并控制增益区域与本征模之间的空间重叠，我们能够从量子化的极化激元态可逆地、动态地产生单模极化激元激光。增加势阱的不对称性，即使对于主量子数(n = 14)的高激发里德堡态也能实现单模激光。此外，由于优异的库-本征模重叠和有效的空间限制，与那些传统的泵浦方案相比，激光阈值可降低多达6个数量级。我们的结果为实现具有动态可调性的无阈值极化激元激光提出了一种新策略。
