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Zhou Y, Scuri G, Wild DS, et al. Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons. Nat Nanotechnol. 2017;12(9):856-860doi: 10.1038/nnano.2017.106.
Zhou, Y., Scuri, G., Wild, D. S., High, A. A., Dibos, A., Jauregui, L. A., Shu, C., De Greve, K., Pistunova, K., Joe, A. Y., Taniguchi, T., Watanabe, K., Kim, P., Lukin, M. D., & Park, H. (2017). Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons. Nature nanotechnology, 12(9), 856-860. https://doi.org/10.1038/nnano.2017.106
Zhou, You, et al. "Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons." Nature nanotechnology vol. 12,9 (2017): 856-860. doi: https://doi.org/10.1038/nnano.2017.106
Zhou Y, Scuri G, Wild DS, High AA, Dibos A, Jauregui LA, Shu C, De Greve K, Pistunova K, Joe AY, Taniguchi T, Watanabe K, Kim P, Lukin MD, Park H. Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons. Nat Nanotechnol. 2017 Sep;12(9):856-860. doi: 10.1038/nnano.2017.106. Epub 2017 Jun 26. PMID: 28650440.
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Nat Nanotechnol. 2017 Sep;12(9):856-860. doi: 10.1038/nnano.2017.106. Epub 2017 Jun 26.

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

Nature nanotechnology

You Zhou, Giovanni Scuri, Dominik S Wild, Alexander A High, Alan Dibos, Luis A Jauregui, Chi Shu, Kristiaan De Greve, Kateryna Pistunova, Andrew Y Joe, Takashi Taniguchi, Kenji Watanabe, Philip Kim, Mikhail D Lukin, Hongkun Park

Affiliations

  1. Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
  2. Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
  3. National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.

PMID: 28650440 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 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 challenging. Here, we introduce a method for probing the optical properties of two-dimensional materials via near-field coupling to surface plasmon polaritons (SPPs). This coupling selectively enhances optical transitions with dipole moments normal to the two-dimensional plane, enabling direct detection of dark excitons in TMD monolayers. When a WSe

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