Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons.

@article{Zhou2017ProbingDE,
  title={Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons.},
  author={You Zhou and Giovanni Scuri and Dominik S. Wild and Alexander A. High and A. Dibos and Luis A Jauregui and Chi Shu and Kristiaan De Greve and Kateryna Pistunova and Andrew Y Joe and Takashi Taniguchi and Kenji Watanabe and Philip Kim and Mikhail D Lukin and Hongkun Park},
  journal={Nature nanotechnology},
  year={2017},
  volume={12 9},
  pages={856-860}
}
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 can be either optically bright or dark. Dark excitons involve nominally spin-forbidden optical transitions with a zero in-plane transition dipole moment, making their detection with conventional far-field optical techniques… CONTINUE READING
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