Photonic bound states in the continuum in nanostructured transition metal dichalcogenides for strong photon–exciton coupling

2021 ◽  
Author(s):  
Xueyang Zong ◽  
Lixia Li ◽  
Yufang Liu
Keyword(s):  
Transition Metal ◽  
Bound States ◽  
Transition Metal Dichalcogenides ◽  
Exciton Coupling ◽  
Metal Dichalcogenides ◽  
The Continuum

scholarly journals Valley excitons in two-dimensional semiconductors

2015 ◽  
Vol 2 (1) ◽  
pp. 57-70 ◽  
Author(s):  
Hongyi Yu ◽  
Xiaodong Cui ◽  
Xiaodong Xu ◽  
Wang Yao
Keyword(s):  
Transition Metal ◽  
Bound States ◽  
Degrees Of Freedom ◽  
Transition Metal Dichalcogenides ◽  
Visible Range ◽  
Two Dimensional ◽  
New Class ◽  
Strong Coulomb ◽  
Metal Dichalcogenides ◽  
Direct Band

Abstract Monolayer group-VIB transition-metal dichalcogenides have recently emerged as a new class of semiconductors in the two-dimensional limit. The attractive properties include the visible range direct band gap ideal for exploring optoelectronic applications; the intriguing physics associated with spin and valley pseudospin of carriers which implies potentials for novel electronics based on these internal degrees of freedom; the exceptionally strong Coulomb interaction due to the two-dimensional geometry and the large effective masses. The physics of excitons, the bound states of electrons and holes, has been one of the most actively studied topics on these two-dimensional semiconductors, where the excitons exhibit remarkably new features due to the strong Coulomb binding, the valley degeneracy of the band edges and the valley-dependent optical selection rules for interband transitions. Here, we give a brief overview of the experimental and theoretical findings on excitons in two-dimensional transition-metal dichalcogenides, with focus on the novel properties associated with their valley degrees of freedom.

Strong plasmon–exciton coupling in transition metal dichalcogenides and plasmonic nanostructures

Nanoscale ◽  
2021 ◽  
Author(s):  
Jiawei Sun ◽  
Yang Li ◽  
Huatian Hu ◽  
Wen Chen ◽  
Di Zheng ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Plasmonic Nanostructures ◽  
Exciton Coupling ◽  
Metal Dichalcogenides

This schematic shows strong plasmon–exciton coupling in transition metal dichalcogenides (TMDs) coupled with plasmonic single nanoparticles, nanoparticles-over-mirrors, and plasmonic arrays.

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