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arXiv 2002.06513physics.optics
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二阶角态低阈值拓扑纳米激光器

Low-threshold topological nanolasers based on second-order corner state

Weixuan Zhang, Xin Xie, Huiming Hao, Jianchen Dang, Shan Xiao, Shushu Shi, Haiqiao Ni, Zhichuan Niu, Can Wang, Kuijuan Jin, Xiangdong Zhang, Xiulai Xu

摘要:

拓扑激光器是近年来发展起来的一种基于多种鲁棒边缘态的微尺度拓扑激光器。二维片上拓扑纳米激光器具有占地面积小、阈值低、能量效率高等特点,其实现仍有待探索。本文报道了在二维光子晶体平板中首次实现高性能拓扑纳米激光器的实验研究。基于推广的二维Su-Schrieffer-Heeger模型,利用Wannier型的0维角态形成拓扑纳米腔.以量子点为活性材料,观察到低阈值约为1 $μW$和高自发发射耦合因子为0.25的激光行为。这样的性能比拓扑边缘激光器好得多,并且与传统的光子晶体纳米激光器相当。我们的实验演示的低阈值拓扑纳米激光器将具有重要意义的拓扑纳米光子电路的发展在经典和量子制度的光子操作。

英文摘要:

The topological lasers, which are immune to imperfections and disorders, have been recently demonstrated based on many kinds of robust edge states, being mostly at microscale. The realization of 2D on-chip topological nanolasers, having the small footprint, low threshold and high energy efficiency, is still to be explored. Here, we report on the first experimental demonstration of the topological nanolaser with high performance in 2D photonic crystal slab. Based on the generalized 2D Su-Schrieffer-Heeger model, a topological nanocavity is formed with the help of the Wannier-type 0D corner state. Laser behaviors with low threshold about 1 $μW$ and high spontaneous emission coupling factor of 0.25 are observed with quantum dots as the active material. Such performance is much better than that of topological edge lasers and comparable to conventional photonic crystal nanolasers. Our experimental demonstration of the low-threshold topological nanolaser will be of great significance to the development of topological nanophotonic circuitry for manipulation of photons in classical and quantum regimes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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