Title

Superradiant Coupling Effects in Transition-Metal Dichalcogenides

Document Type

Article

Publication Date

2018

Digital Object Identifier (DOI)

https://doi.org/10.1364/OPTICA.5.000749

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.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Optica, v. 5, issue 6, p. 749-755

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