Document Details Document Type : Article In Journal  Document Title : Monolayer excitonic laser Monolayer excitonic laser   Subject : physics  Document Language : English  Abstract : 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(1-5), creating new optical functionalities for nextgeneration ultra-compact photonics and optoelectronics. Although the enhancement of spontaneous emission has been reported on TMDC monolayers integrated with photonic crystals(6,7) and distributed Bragg reflector microcavities(8,9), 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.  ISSN : 1749-4885  Journal Name : NATURE PHOTONICS  Volume : 9  Issue Number : 11  Publishing Year : 1435 AH 2015 AD  Article Type : Article  Added Date : Wednesday, August 16, 2017  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email Y Ye Ye, Yang Investigator Doctorate   Z.J Wong Wong, Z.J Researcher Doctorate xiang@berkeley.edu X Lu Lu, X Researcher Doctorate   H Zhu Zhu, H Researcher Doctorate   X.J Ni Ni, X.J Researcher     H Zhu Zhu, H Researcher Doctorate   X.H Chen Chen, X.H Researcher Doctorate   Y Wang Wang, Y Researcher Doctorate   X Zhang Zhang, X Researcher Doctorate   Files File Name Type Description  42656.pdf pdf   Back To Researches Page