Steering valley-polarized emission of monolayer MoS <sub>2</sub> sandwiched in plasmonic antennas
Te Wen, Weidong Zhang, Shuai Liu, Aiqin Hu, Jingyi Zhao, Yu Ye, Yang Chen, Cheng‐Wei Qiu, Qihuang Gong, Guowei Lü
Abstract
using the antenna can reach up to ~47%, with approximately three orders of PL magnitude enhancement within the plasmonic nanogap. Besides, the K and K' valleys under opposite circularly polarized light excitation exhibit different emission intensities and directivities in the far field, which can be attributed to the modulation of the valley-dependent excitons by the chiral antenna in both the excitation and emission processes. The distinct features of the ultracompact hybrid suggest potential applications for valleytronic and photonic devices, chiral quantum optics, and high-sensitivity detection.
Topics & Concepts
PlasmonMonolayerExcitationOptoelectronicsExcitonPhotoluminescenceMaterials sciencePhotonicsAntenna (radio)NanorodPhysicsNanotechnologyCondensed matter physicsTelecommunicationsQuantum mechanicsComputer science2D Materials and ApplicationsPlasmonic and Surface Plasmon ResearchMetamaterials and Metasurfaces Applications