Interlayer exciton laser of extended spatial coherence in atomically thin heterostructures

被引：189

作者：

Paik, Eunice Y. ^{[1
]}

Zhang, Long ^{[1
]}

Burg, G. William ^{[2
]}

Gogna, Rahul ^{[3
]}

Tutuc, Emanuel ^{[2
]}

Deng, Hui ^{[1
]}

机构：

[1] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[2] Univ Texas Austin, Dept Elect & Comp Engn, Microelect Res Ctr, Austin, TX 78712 USA

[3] Univ Michigan, Appl Phys Program, Ann Arbor, MI 48109 USA

来源：

NATURE | 2019年 / 576卷 / 7785期

关键词：

D O I：

10.1038/s41586-019-1779-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Two-dimensional semiconductors have emerged as a new class of materials for nanophotonics owing to their strong exciton-photon interaction(1,2) and their ability to be engineered and integrated into devices(3). Here we take advantage of these properties to engineer an efficient lasing medium based on direct-bandgap interlayer excitons in rotationally aligned atomically thin heterostructures(4). Lasing is measured from a transition-metal dichalcogenide heterobilayer (WSe2-MoSe2) integrated in a silicon nitride grating resonator. An abrupt increase in the spatial coherence of the emission is observed acrossthe lasing threshold. The work establishes interlayer excitons in two-dimensional heterostructures as a gain medium with spatially coherent lasing emission and potential for heterogeneous integration. With electrically tunable exciton-photon interaction strengths(5) and long-range dipolar interactions, these interlayer excitons are promising for application as low-power, ultrafast lasers and modulators and for the study of many-body quantum phenomena(6).

引用

页码：80 / +

页数：17

共 34 条

[21] Optically Pumped Two-Dimensional MoS2 Lasers Operating at Room-Temperature [J].