Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons.
Sign Up to like & getrecommendations! Published in 2017 at "Nature nanotechnology"
DOI: 10.1038/nnano.2017.106
Abstract: Transition metal dichalcogenide (TMD) monolayers with a direct bandgap feature tightly bound excitons, strong spin-orbit coupling and spin-valley degrees of freedom. Depending on the spin configuration of the electron-hole pairs, intra-valley excitons of TMD monolayers… read more here.
Keywords: coupling surface; field; dark excitons; near field ... See more keywords
Measurement of the spin-forbidden dark excitons in MoS2 and MoSe2 monolayers
Sign Up to like & getrecommendations! Published in 2020 at "Nature Communications"
DOI: 10.1038/s41467-020-17608-4
Abstract: Excitons with binding energies of a few hundreds of meV control the optical properties of transition metal dichalcogenide monolayers. Knowledge of the fine structure of these excitons is therefore essential to understand the optoelectronic properties… read more here.
Keywords: mos2 mose2; forbidden dark; dark excitons; mose2 monolayers ... See more keywords
Role of dark exciton states in the relaxation dynamics of bright 1s excitons in monolayer WSe2
Sign Up to like & getrecommendations! Published in 2021 at "Applied Physics Letters"
DOI: 10.1063/5.0064795
Abstract: Monolayer transition metal dichalcogenides (1L-TMDs) are excellent platforms for exciton physics. In tungsten-based 1L-TMDs, the existence of dark excitons at lower energy has important roles for bright exciton relaxation. However, the detailed relaxation dynamics from… read more here.
Keywords: dynamics bright; relaxation dynamics; dark excitons; exciton ... See more keywords
Interface dark excitons at sharp lateral two-dimensional heterostructures
Sign Up to like & getrecommendations! Published in 2020 at "Physica Scripta"
DOI: 10.1088/1402-4896/abe494
Abstract: We study the dark excitons at the interface of a sharp lateral heterostructure of two-dimensional transition metal dichalcogenides (TMDs). By introducing a low-energy effective Hamiltonian model, we find the energy dispersion relation of exciton and… read more here.
Keywords: energy; exciton; dark excitons; two dimensional ... See more keywords
Multipath Optical Recombination of Intervalley Dark Excitons and Trions in Monolayer WSe_{2}.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.124.196802
Abstract: Excitons and trions (or exciton polarons) in transition metal dichalcogenides (TMDs) are known to decay predominantly through intravalley transitions. Electron-hole recombination across different valleys can also play a significant role in the excitonic dynamics, but… read more here.
Keywords: dark excitons; excitons trions; recombination; multipath optical ... See more keywords
High Efficiency Dark-to-Bright Exciton Conversion in Carbon Nanotubes
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review X"
DOI: 10.1103/physrevx.9.041048
Abstract: We report that dark excitons can have a large contribution to the emission intensity in carbon nanotubes due to an efficient exciton conversion from a dark state to a bright state. Time-resolved photoluminescence measurements are… read more here.
Keywords: dark excitons; carbon nanotubes; conversion; dark ... See more keywords
Probing the dark side of the exciton
Sign Up to like & getrecommendations! Published in 2020 at "Science"
DOI: 10.1126/science.abf0371
Abstract: Photoemitted electrons reveal large-momentum (“dark”) excitons in monolayer WSe2 Two-dimensional (2D) semiconductors, such as transition-metal dichalcogenides, may enable new optoelectronic technologies (1). The optical excitation in these atomically thin materials creates tightly bound excitons composed… read more here.
Keywords: dark side; side exciton; dark excitons; exciton ... See more keywords