Journal
ACS NANO
Volume 12, Issue 9, Pages 9390-9396Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.8b04511
Keywords
MoS2; small laser; microsphere; continuous-wave lasing; layered materials
Categories
Funding
- National Key Research and Development Program of China [2017YFA0304600, 2017YFA0205700, 2016YFA0200103, 2016YFA0200700, 2017YFA0205004]
- National Natural Science Foundation of China [61774003, 51290272, 51472008, 11674150, 11304172, 21673054]
- Peking University
- 1000 Talent Programs from the Chinese government
- Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics [KF201601, KF201604]
- Beijing Municipal Natural Science Foundation [4182076, 4184109]
- Shenzhen Science and Technology Innovation Commission [JCYJ20160613160524999]
- Shandong Province Key Research Development Program [2015GGX101017]
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The realization of low-energy-consumption lasers based on atomically thin two-dimensional (2D) transition metal dichalcogenides (TMDCs) is crucial for the development of optical communications, flexible displays, and lasers on the chip level. However, among the as-demonstrated TMDC-based lasers so far, the gain materials are mainly achieved by a mechanical exfoliation approach accompanied by poor reproducibility and controllability. In this work, we report a controllable design for generating large-scale lasing from chemical vapor deposition (CVD)-derived high-quality monolayer MoS2 film. Strong continuous-wave optically driven whispering-gallery-mode lasing is achieved in a wide temperature range from 77 to 400 K. The eminent lasing performances result from the strong spatial confinement of carriers and the enhanced efficiency of spontaneous emission owing to the lensing and screening effects of silica microsphere cavities. These findings not only advance the fundamental understanding of 2D lasing effects but also provide solutions to fabricate low-cost, scalable, and integratable TMDC-based lasers.
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