Exciton-Plasmon Coupling and Electromagnetically Induced Transparency in Monolayer Semiconductors Hybridized with Ag Nanoparticles

Weijie Zhao; Shunfeng Wang; Bo Liu; Ivan Verzhbitskiy; Shisheng Li; Francesco Giustiniano; Daichi Kozawa; Kian Ping Loh; Kazunari Matsuda; Koichi Okamoto; Rupert F Oulton; Goki Eda

doi:10.1002/adma.201504478

Exciton-Plasmon Coupling and Electromagnetically Induced Transparency in Monolayer Semiconductors Hybridized with Ag Nanoparticles

Adv Mater. 2016 Apr 13;28(14):2709-15. doi: 10.1002/adma.201504478. Epub 2016 Feb 2.

Authors

Affiliations

¹ Department of Physics, Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 2 Science Drive 3, 117542, Singapore.
² Department of Chemistry, Centre for Advanced 2D Materials and Graphene Research Centre, 3 Science Drive 3, 117543, Singapore.
³ Institute of Advanced Energy, Kyoto University, Uji, Kyoto, 611-0011, Japan.
⁴ Institute for Materials Chemistry and Engineering, Kyushu University, Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
⁵ Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2BZ, UK.

PMID: 26835879
DOI: 10.1002/adma.201504478

Abstract

Exciton-plasmon coupling in hybrids of a monolayer transition metal dichalcogenide and Ag nanoparticles is investigated in the weak and strong coupling regimes. In the weak coupling regime, both absorption enhancement and the Purcell effect collectively modify the photoluminescence properties of the semiconductor. In the strong coupling regime, electromagnetically induced transparency dips are displayed, evidencing coherent energy exchange between excitons and plasmons.

Keywords: Purcell effect; electromagnetically induced transparency; exciton-plasmon coupling; localized surface plasmon; transition metal dichalcogenides.