Superradiant coupling effects in transition-metal dichalcogenides

C. E. Stevens, T. Stroucken, A. V. Stier, J. Paul, H. Zhang, P. Dey, S. A. Crooker, S. W. Koch, D. Karaiskaj

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Cooperative effects allow for fascinating characteristics in light–matter interacting systems. Here, we study naturally occurring superradiant coupling in a class of quasi–two-dimensional, layered semiconductor systems. We perform optical absorption experiments of the lowest exciton for transition-metal dichalcogenides with different numbers of atomic layers. We examine two representative materials, MoSe2 and WSe2, using incoherent broadband white light. The measured transmission at the A exciton resonance does not saturate for optically thick samples consisting of hundreds of atomic layers, and the transmission varies nonmonotonously with the layer number. A self-consistent microscopic calculation reproduces the experimental observations, clearly identifying superradiant coupling effects as the origin of this unexpected behavior.

Original languageEnglish (US)
Article number060749-07
Pages (from-to)749-755
Number of pages7
JournalOptica
Volume5
Issue number6
DOIs
StatePublished - Jun 20 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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