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

doi:10.1364/OPTICA.5.000749

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

Optical Sciences, College of

Research output: Contribution to journal › Article

4 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 language	English (US)
Article number	060749-07
Pages (from-to)	749-755
Number of pages	7
Journal	Optica
Volume	5
Issue number	6
DOIs	https://doi.org/10.1364/OPTICA.5.000749
State	Published - Jun 20 2018

ASJC Scopus subject areas

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

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Stevens, C. E., Stroucken, T., Stier, A. V., Paul, J., Zhang, H., Dey, P., Crooker, S. A., Koch, S. W., & Karaiskaj, D. (2018). Superradiant coupling effects in transition-metal dichalcogenides. Optica, 5(6), 749-755. [060749-07]. https://doi.org/10.1364/OPTICA.5.000749

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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.",

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AU - Stevens, C. E.

AU - Stroucken, T.

AU - Stier, A. V.

AU - Paul, J.

AU - Zhang, H.

AU - Dey, P.

AU - Crooker, S. A.

AU - Koch, S. W.

AU - Karaiskaj, D.

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