Kern, JohannesTrügler, AndreasNiehues, IrisEwering, JohannesSchmidt, RobertSchneider, RobertNajmaei, SinaGeorge, AntonyZhang, JingLou, JunHohenester, Ulrichde Vasconcellos, Steffen MichaelisBratschitsch, Rudolf2016-04-042016-04-042015Kern, Johannes, Trügler, Andreas, Niehues, Iris, et al.. "Nanoantenna-Enhanced Light-Matter Interaction in Atomically Thin WS2." <i>ACS Photonics,</i> 2, no. 9 (2015) American Chemical Society: 1260-1265. http://dx.doi.org/10.1021/acsphotonics.5b00123.https://hdl.handle.net/1911/88843Atomically thin transition metal dichalcogenides (TMDCs) are an emerging class of two-dimensional semiconductors. Recently, the first optoelectronic devices featuring photodetection as well as electroluminescence have been demonstrated using monolayer TMDCs as active material. However, the lightﾖmatter coupling for atomically thin TMDCs is limited by their small absorption length and low photoluminescence quantum yield. Here, we significantly increase the lightﾖmatter interaction in monolayer tungsten disulfide (WS2) by coupling the atomically thin semiconductor to a plasmonic nanoantenna. Due to the plasmon resonance of the nanoantenna, strongly enhanced optical near-fields are generated within the WS2ﾠmonolayer. We observe an increase in photoluminescence intensity by more than 1 order of magnitude, resulting from a combined absorption and emission enhancement of the exciton in the WS2monolayer. The polarization characteristics of the coupled system are governed by the nanoantenna. The robust nanoantennaﾖmonolayer hybrid paves the way for efficient photodetectors, solar cells, and light-emitting devices based on two-dimensional materials.engThis is an open access article published under an ACS AuthorChoiceﾠLicense, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.Journal articleplasmonicsnanoantenna2D materialstransition metal dichalcogenidesWS2photoluminescencedark-field scatteringhttp://dx.doi.org/10.1021/acsphotonics.5b00123