Monolayer excitonic laser
Monolayer excitonic laser
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DOI：
10.1038/nphoton.2015.197
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发表时间：
2015-03
期刊：
影响因子：
35
通讯作者：
Yu Ye;Z. Wong;X. Lu;X. Ni;Hanyu Zhu;Xianhui Chen;Yuan Wang;Xiang Zhang
中科院分区：
文献类型：
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作者：
Yu Ye;Z. Wong;X. Lu;X. Ni;Hanyu Zhu;Xianhui Chen;Yuan Wang;Xiang Zhang
二维货车德瓦耳斯材料由于其新兴的物理性质，为基础物理探索和器件应用开辟了新的范式。与无带隙石墨烯不同，单层过渡金属二硫属化物（TMDC）是二维半导体，其经历间接到直接的带隙转变，为下一代超紧凑光子学和光电子学创造了新的光学功能。尽管已经报道了与光子晶体集成的TMDC单层和分布式布拉格反射器微腔的自发发射的增强，但是来自TMDC单层的相干光发射尚未得到证实。在这里，我们报告的二维激子激光器的实现嵌入单层WS2微盘谐振器。利用具有高品质因数和光学限制的回音壁模式，我们观察到明亮的激子激光在可见光波长。二维激子激光器的演示标志着二维片上光电子技术在高性能光通信和计算应用方面迈出了重要一步。
Two-dimensional van der Waals materials have opened a new paradigm for fundamental physics exploration and device applications because of their emerging physical properties. Unlike gapless graphene, monolayer transition-metal dichalcogenides (TMDCs) are two-dimensional semiconductors that undergo an indirect-to-direct bandgap transition,,,,, creating new optical functionalities for next-generation ultra-compact photonics and optoelectronics. Although the enhancement of spontaneous emission has been reported on TMDC monolayers integrated with photonic crystals,and distributed Bragg reflector microcavities,, coherent light emission from a TMDC monolayer has not been demonstrated. Here, we report the realization of a two-dimensional excitonic laser by embedding monolayer WS2in a microdisk resonator. Using a whispering gallery mode with a high quality factor and optical confinement, we observe bright excitonic lasing at visible wavelengths. This demonstration of a two-dimensional excitonic laser marks a major step towards two-dimensional on-chip optoelectronics for high-performance optical communication and computing applications.