title: Controlling the spontaneous emission rate of monolayer MoS2in a photonic crystal nanocavity.
abstract: We report on controlling the spontaneous emission (SE) rate of a molybdenum disulfide (MoS2) monolayer coupled with a planar photonic crystal (PPC) nanocavity. Spatially resolved photoluminescence (PL) mapping shows strong variations of emission when the MoS2monolayer is on the PPC cavity, on the PPC lattice, on the air gap, and on the unpatterned gallium phosphide substrate. Polarization dependences of the cavity-coupled MoS2emission show a more than 5 times stronger extracted PL intensity than the un-coupled emission, which indicates an underlying cavity mode Purcell enhancement of the MoS2SE rate exceeding a factor of 70.
authors.affiliation: School of Science, Northwestern Polytechnical University, Xi'an 710072, China ; Department of Electrical Engineering, Columbia University, New York, New York 10027, USA.
authors.forename: Xuetao
authors.initials: X
authors.lastname: Gan
authors.forename: Yuanda
authors.initials: Y
authors.lastname: Gao
authors.forename: Kin
authors.initials: K
authors.lastname: Fai Mak
authors.forename: Xinwen
authors.initials: X
authors.lastname: Yao
authors.forename: Ren-Jye
authors.initials: RJ
authors.lastname: Shiue
authors.forename: Arend
authors.initials: A
authors.lastname: van der Zande
authors.forename: Matthew E
authors.initials: ME
authors.lastname: Trusheim
authors.forename: Fariba
authors.initials: F
authors.lastname: Hatami
authors.forename: Tony F
authors.initials: TF
authors.lastname: Heinz
authors.forename: James
authors.initials: J
authors.lastname: Hone
authors.forename: Dirk
authors.initials: D
authors.lastname: Englund