Hybrid exciton-plasmon-polaritons in van der Waals semiconductor gratings

Huiqin Zhang, Bhaskar Abhiraman, Qing Zhang, Jinshui Miao, Kiyoung Jo, Stefano Roccasecca, Mark W. Knight, Artur R. Davoyan and Deep Jariwala ()
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Huiqin Zhang: University of Pennsylvania
Bhaskar Abhiraman: University of Pennsylvania
Qing Zhang: National University of Singapore
Jinshui Miao: University of Pennsylvania
Kiyoung Jo: University of Pennsylvania
Stefano Roccasecca: University of Pennsylvania
Mark W. Knight: NG Next, Northrop Grumman Corporation
Artur R. Davoyan: University of California
Deep Jariwala: University of Pennsylvania

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Van der Waals materials and heterostructures that manifest strongly bound exciton states at room temperature also exhibit emergent physical phenomena and are of great promise for optoelectronic applications. Here, we demonstrate that nanostructured, multilayer transition metal dichalcogenides (TMDCs) by themselves provide an ideal platform for excitation and control of excitonic modes, paving the way to exciton-photonics. Hence, we show that by patterning the TMDCs into nanoresonators, strong dispersion and avoided crossing of exciton, cavity photons and plasmon polaritons with effective separation energy exceeding 410 meV can be controlled with great precision. We further observe that inherently strong TMDC exciton absorption resonances may be completely suppressed due to excitation of hybrid light-matter states and their interference. Our work paves the way to the next generation of integrated exciton optoelectronic nano-devices and applications in light generation, computing, and sensing.

Date: 2020
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DOI: 10.1038/s41467-020-17313-2

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