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dc.contributor.authorZhang, Dao Huaen
dc.contributor.authorFong, Kah Eeen
dc.contributor.authorGao, Yuanen
dc.contributor.authorDang, Cuongen
dc.contributor.authorTobing, Landobasa Yosef Marioen
dc.contributor.authorMuhammad Danang Birowosutoen
dc.contributor.authorDemir, Hilmi Volkanen
dc.identifier.citationTobing, L. Y. M., Zhang, D. H., Fong, K. E., Muhammad Danang Birowosuto, Gao, Y., Dang, C., & Demir, H. V. (2018). Polarization-resolved plasmon-modulated emissions of quantum dots coupled to aluminum dimers with sub-20 nm gaps. ACS Photonics, 5(4), 1566-1574. doi:10.1021/acsphotonics.8b00009en
dc.description.abstractAn aluminum dimer nanoantenna with nanogaps is an ideal platform for enhancing light–matter interaction at the nanoscale for the UV–vis spectrum, but its realization has been hindered by the surface oxidation of aluminum nanostructures, aluminum interband loss, and practical limitations in lithographic patterning. Here, we have overcome these problems and demonstrated the successful fabrication of an aluminum dimer antenna with a ∼10 nm gap, which to the best of our knowledge marks the smallest features of an Al nanoantenna. We present the first in-depth study of strongly polarization-dependent emissions of colloidal quantum dots coupled with Al dimers and elucidate the individual contributions of the excitation intensity, quantum yield, and extraction efficiency enhancements from numerical and experimental perspectives. We estimate the Purcell effect corresponding to a single Al-dimer antenna as ∼104 by taking into account the ensemble averaging effect and the distributions in emitter dipole orientations. This finding brings us a step closer toward a cost-effective realization of bright and ultrafast single emitters.en
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.description.sponsorshipEDB (Economic Devt. Board, S’pore)en
dc.format.extent27 p.en
dc.relation.ispartofseriesACS Photonicsen
dc.rights© 2018 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen
dc.subjectPlasmonic Enhancementen
dc.subjectAluminum Plasmonicsen
dc.titlePolarization-resolved plasmon-modulated emissions of quantum dots coupled to aluminum dimers with sub-20 nm gapsen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen
dc.contributor.organizationCNRS International NTU Thales Research Alliance (CINTRA)en
dc.contributor.researchResearch Techno Plazaen
dc.description.versionAccepted versionen
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