Superradiant Coupling Effects in Transition-Metal Dichalcogenides
Digital Object Identifier (DOI)
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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Citation / Publisher Attribution
Optica, v. 5, issue 6, p. 749-755
Scholar Commons Citation
Stevens, C. E.; Stroucken, T.; Stier, A. V.; Paul, J.; Zhang, H.; Dey, P.; Crooker, S. A.; Koch, S. W.; and Karaiskaj, Denis, "Superradiant Coupling Effects in Transition-Metal Dichalcogenides" (2018). Physics Faculty Publications. 55.