title: Tailoring MoS2Exciton-Plasmon Interaction by Optical Spin-Orbit Coupling.
abstract: Molybdenum disulfide (MoS2) monolayer as one of the atomic thickness two-dimensional materials has remarkable electronic and optical properties, which is an ideal candidate for a wide range of optoelectronic applications. However, the atomic monolayer thickness poses a significant challenge in MoS2photoluminescence emission due to weak light-matter interaction. Here, we investigate the MoS2exciton-plasmon interaction with spin-orbit coupling of light. The plasmonic spiral rings with subwavelength dimensions are designed and fabricated on hybrid substrates. MoS2photoluminescence enhancement can be actively controlled by changing the incident optical spin states, laser powers, and the nanospiral geometries, which is arising from the change of field enhancement at near-field region. Planar light-emitting devices based on spin-orbit coupling (SOC) effect were further realized and flexibly controlled by changing the polarization of light. The SOC effect is discussed by the accumulation of geometric and dynamic phases, which can be demonstrated and elaborated by the Majorana sphere model. Our results provide a way to manipulate MoS2light-matter interaction actively and can be further applied in the spin-dependent light-emitting devices at the nanoscale.
authors.affiliation: School of Physics, State Key Lab for Mesoscopic Physics; Academy for Advanced Interdisciplinary Studies; Collaborative Innovation Center of Quantum Matter, Peking University , Beijing 100871, China.
authors.forename: Ziwei
authors.identifier: 0000-0002-2987-7186
authors.initials: Z
authors.lastname: Li
authors.affiliation: School of Physics, State Key Lab for Mesoscopic Physics; Academy for Advanced Interdisciplinary Studies; Collaborative Innovation Center of Quantum Matter, Peking University , Beijing 100871, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Li
authors.affiliation: School of Physics, State Key Lab for Mesoscopic Physics; Academy for Advanced Interdisciplinary Studies; Collaborative Innovation Center of Quantum Matter, Peking University , Beijing 100871, China.
authors.forename: Tianyang
authors.initials: T
authors.lastname: Han
authors.affiliation: NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technology University , Singapore 639798.
authors.forename: Xingli
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of Physics, State Key Lab for Mesoscopic Physics; Academy for Advanced Interdisciplinary Studies; Collaborative Innovation Center of Quantum Matter, Peking University , Beijing 100871, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Yu
authors.affiliation: NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technology University , Singapore 639798.
authors.forename: Bengkang
authors.initials: B
authors.lastname: Tay
authors.affiliation: NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technology University , Singapore 639798.
authors.forename: Zheng
authors.identifier: 0000-0002-8825-7198
authors.initials: Z
authors.lastname: Liu
authors.affiliation: School of Physics, State Key Lab for Mesoscopic Physics; Academy for Advanced Interdisciplinary Studies; Collaborative Innovation Center of Quantum Matter, Peking University , Beijing 100871, China.
authors.forename: Zheyu
authors.identifier: 0000-0001-5780-0728
authors.initials: Z
authors.lastname: Fang
keywords: MoS2; exciton−plasmon interaction; photoluminescence; spin−orbit coupling