Monolayer excitonic laser Academic Article uri icon


  • 2015 Macmillan Publishers Limited. All rights reserved. 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 WS2 in 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.

published proceedings

  • Nature Photonics

altmetric score

  • 163.634

author list (cited authors)

  • Ye, Y. u., Wong, Z. J., Lu, X., Ni, X., Zhu, H., Chen, X., Wang, Y., & Zhang, X.

citation count

  • 428

complete list of authors

  • Ye, Yu||Wong, Zi Jing||Lu, Xiufang||Ni, Xingjie||Zhu, Hanyu||Chen, Xianhui||Wang, Yuan||Zhang, Xiang

publication date

  • January 2015