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Plasmonic Modulation of Valleytronic Emission in Two‐Dimensional Transition Metal Dichalcogenides
Author(s) -
Deng Miaoyi,
Wang Xiao,
Chen Jianing,
Li Ziwei,
Xue Mengfei,
Zhou Zhiyuan,
Lin Feng,
Zhu Xing,
Fang Zheyu
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202010234
Subject(s) - plasmon , materials science , condensed matter physics , point reflection , surface plasmon polariton , surface plasmon , degenerate energy levels , transition metal , electron , modulation (music) , semiconductor , optoelectronics , physics , quantum mechanics , chemistry , acoustics , catalysis , biochemistry
Monolayered transition metal dichalcogenides (TMDs) are one kind of hexagonal 2D semiconductors with a direct bandgap structure. Due to the property of natural broken inversion symmetry in the lattice, the strong spin–orbit coupling of electrons in TMDs can induce degenerate levels with antiparallel spins in K and K′ valleys, which selectively respond with external light excitations. Surface plasmon resonance with efficient electromagnetic enhancement and near‐field coupling provides excellent potential opportunities to modulate valley emission of TMDs. Efforts have been devoted to investigating the interaction principles and applications of this research field. This review focuses on plasmonic modulation of valleytronic emission in TMDs with surface plasmon polaritons (SPP) and localized surface plasmons (LSP) based on different modulation principles, respectively, and discusses possible research directions for future device applications.