@article{bf9388e26f064bd48c1d06c52d1427ed,
title = "Interfacial engineering of plasmonic nanoparticle metasurfaces",
abstract = "This paper reports how the interfacial engineering of plasmonic nanoparticle (NP) lattices with desired surface characteristics can control plasmon-molecule interactions for tunable nanolasing thresholds. Compared to bare Cu NP lattices, graphene-coated Cu NPs surrounded by aromatic dye molecules gain support lasing with lower thresholds and at lower dye concentrations. This lasing enhancement is attributed to favorable molecular arrangements in electromagnetic hotspots through π–π interactions between graphene and IR-140 (5,50-dichloro-11-diphenylamine-3,30-diethyl-10,12-ethylene-thiatricarbocyanine-perchlorate) and 4-(dicyanomethylene)-2-methyl-6-(4-dimethyla-minostyryl)-4H-pyran (DCM) dyes. Besides the chemical interactions mediated by few-layer graphene, nanoscale dielectric layers such as fluoropolymer and alumina can also tailor the thresholds by modifying the spatial overlap of the dye near the NP surface. Our work lays the foundation for interfacial engineering of the surface of resonator units in plasmonic metasurfaces for exquisite control of light-matter interactions.",
keywords = "Cu plasmonics, core-shell nanoparticles, graphene, light-matter interactions, nanolasing",
author = "Shikai Deng and Park, {Jeong Eun} and Gyeongwon Kang and Jun Guan and Ran Li and Schatz, {George C.} and Odom, {Teri W.}",
note = "Funding Information: ACKNOWLEDGMENTS. This work was supported by the Vannevar Bush Faculty Fellowship from the US Department of Defense (DOD N00014-17-1-3023). S.D. thanks the Cottrell Fellowship from the Research Corporation for Science Advancement (27464) and the National Science Foundation (CHE-2039044). G.K. and G.C.S. (electronic structure theory) were supported by the Department of Energy, Office of Basic Energy Sciences, under Grant DE-SC0004752. This work used the Northwestern University Micro/Nano Fabrication Facility, which is partially supported by the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205), the Materials Research Science and Engineering Center (DMR-1720139), the State of Illinois, and Northwestern University. Samples were characterized using the Electron Probe Instrumentation Center and Scanned Probe Imaging and Development facilities of Northwestern University{\textquoteright}s Atomic and Nanoscale Characterization Experimental Center, which has received support from the SHyNE Resource; the Materials Research Science and Engineering Center program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois through the IIN. The CVD treatments were conducted at the Berry Research Laboratory at the University of Illinois Chicago. Publisher Copyright: Copyright {\textcopyright} 2022 the Author(s).",
year = "2022",
month = may,
day = "31",
doi = "10.1073/pnas.2202621119",
language = "English (US)",
volume = "119",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
publisher = "National Academy of Sciences",
number = "22",
}