期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.027401
关键词
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资金
- DoD Vannevar Bush Faculty Fellowship [N00014-16-1-2825, N00014-18-1-2877]
- NSF [PHY-1506284]
- NSF CUA [PHY-1125846]
- AFOSR MURI [FA9550-17-1-0002]
- ARL [W911NF1520067]
- Gordon and Betty Moore Foundation [GBMF4543]
- ONR MURI [N00014-15-1-2761]
- Samsung Electronics
We demonstrate a new approach for dynamically manipulating the optical response of an atomically thin semiconductor, a monolayer of MoSe2, by suspending it over a metallic mirror. First, we show that suspended van der Waals heterostructures incorporating a MoSe2 monolayer host spatially homogeneous, lifetime-broadened excitons. Then, we interface this nearly ideal excitonic system with a metallic mirror and demonstrate control over the exciton-photon coupling. Specifically, by electromechanically changing the distance between the heterostructure and the mirror, thereby changing the local photonic density of states in a controllable and reversible fashion, we show that both the absorption and emission properties of the excitons can be dynamically modulated. This electromechanical control over exciton dynamics in a mechanically flexible, atomically thin semiconductor opens up new avenues in cavity quantum optomechanics, nonlinear quantum optics, and topological photonics.
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