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dc.contributor.authorShan, Hangyongen
dc.contributor.authorYu, Yingen
dc.contributor.authorWang, Xinglien
dc.contributor.authorLuo, Yangen
dc.contributor.authorZu, Shuaien
dc.contributor.authorDu, Bowenen
dc.contributor.authorHan, Tianyangen
dc.contributor.authorLi, Bowenen
dc.contributor.authorLi, Yuen
dc.contributor.authorWu, Jiaruien
dc.contributor.authorLin, Fengen
dc.contributor.authorShi, Kebinen
dc.contributor.authorTay, Beng Kangen
dc.contributor.authorLiu, Zhengen
dc.contributor.authorZhu, Xingen
dc.contributor.authorFang, Zheyuen
dc.identifier.citationShan, H., Yu, Y., Wang, X., Luo, Y., Zu, S., Du, B., . . . Fang, Z. (2019). Direct observation of ultrafast plasmonic hot electron transfer in the strong coupling regime. Light: Science & Applications, 8(1), 9-. doi:10.1038/s41377-019-0121-6en
dc.description.abstractAchieving strong coupling between plasmonic oscillators can significantly modulate their intrinsic optical properties. Here, we report the direct observation of ultrafast plasmonic hot electron transfer from an Au grating array to an MoS2 monolayer in the strong coupling regime between localized surface plasmons (LSPs) and surface plasmon polaritons (SPPs). By means of femtosecond pump-probe spectroscopy, the measured hot electron transfer time is approximately 40 fs with a maximum external quantum yield of 1.65%. Our results suggest that strong coupling between LSPs and SPPs has synergetic effects on the generation of plasmonic hot carriers, where SPPs with a unique nonradiative feature can act as an ‘energy recycle bin’ to reuse the radiative energy of LSPs and contribute to hot carrier generation. Coherent energy exchange between plasmonic modes in the strong coupling regime can further enhance the vertical electric field and promote the transfer of hot electrons between the Au grating and the MoS2 monolayer. Our proposed plasmonic strong coupling configuration overcomes the challenge associated with utilizing hot carriers and is instructive in terms of improving the performance of plasmonic opto-electronic devices.en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.format.extent9 p.en
dc.relation.ispartofseriesLight: Science & Applicationsen
dc.rights© 2019 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.subjectHot Electron Transferen
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen
dc.subjectStrong Coupling Regimeen
dc.titleDirect observation of ultrafast plasmonic hot electron transfer in the strong coupling regimeen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen
dc.contributor.schoolSchool of Materials Science & Engineeringen
dc.contributor.organizationCentre for Programmed Materialsen
dc.contributor.organizationCentre for Micro-/Nano-Electronicsen
dc.contributor.organizationCNRS International-NTU-Thales Research Allianceen
dc.description.versionPublished versionen
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