Abstract
Absorbance of monolayer MoS${}_{2}$ is weak due to its atomic thickness. This poses an obstacle for its applications. The authors reveal numerically and experimentally that the resonance of dielectric Si nanodisks can enhance the absorbance and emission of monolayer MoS${}_{2}$. Taking into account of both the absorbance and quantum efficiency modifications by the dielectric disk resonators, their model successfully explains the observed emission enhancement under normal light incidence. An underlying gold mirror further strengthens the absorbance of monolayer MoS${}_{2}$. A perfectly absorbing structure is proposed, with 53% of the total incident power absorbed by the MoS${}_{2}$ monolayer.
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