期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.037402
关键词
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资金
- DoD Vannevar Bush Faculty Fellowship [N00014-16-1-2825]
- AFOSR MURI [FA9550-12-1-0024, FA9550-17-1-0002]
- NSF [PHY-1506284, PHY-1125846, W911NF1520067]
- Gordon and Betty Moore Foundation
- Samsung Electronics
We demonstrate that a single layer of MoSe2 encapsulated by hexagonal boron nitride can act as an electrically switchable mirror at cryogenic temperatures, reflecting up to 85% of incident light at the excitonic resonance. This high reflectance is a direct consequence of the excellent coherence properties of excitons in this atomically thin semiconductor. We show that the MoSe2 monolayer exhibits power-and wavelength-dependent nonlinearities that stem from exciton-based lattice heating in the case of continuous-wave excitation and exciton-exciton interactions when fast, pulsed laser excitation is used.
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