Direct nano-imaging of light-matter interactions in nanoscale excitonic emitters.

Autor: Jo K; Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA., Marino E; Department of Chemistry, University of Pennsylvania, Philadelphia, PA, 19104, USA.; Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Via Archirafi 36, 90123, Palermo, Italy., Lynch J; Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA., Jiang Z; Department of Chemistry, University of Pennsylvania, Philadelphia, PA, 19104, USA.; Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA., Gogotsi N; Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA., Darlington TP; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Soroush M; Departement of Physics, Montana State University, Bozeman, MT, 59717, USA., Schuck PJ; Department of Mechanical Engineering, Columbia University, New York, NY, 10027, USA., Borys NJ; Departement of Physics, Montana State University, Bozeman, MT, 59717, USA., Murray CB; Department of Chemistry, University of Pennsylvania, Philadelphia, PA, 19104, USA.; Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA., Jariwala D; Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA. dmj@seas.upenn.edu.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 May 08; Vol. 14 (1), pp. 2649. Date of Electronic Publication: 2023 May 08.
DOI: 10.1038/s41467-023-38189-y
Abstrakt: Strong light-matter interactions in localized nano-emitters placed near metallic mirrors have been widely reported via spectroscopic studies in the optical far-field. Here, we report a near-field nano-spectroscopic study of localized nanoscale emitters on a flat Au substrate. Using quasi 2-dimensional CdSe/Cd x Zn 1-x S nanoplatelets, we observe directional propagation on the Au substrate of surface plasmon polaritons launched from the excitons of the nanoplatelets as wave-like fringe patterns in the near-field photoluminescence maps. These fringe patterns were confirmed via extensive electromagnetic wave simulations to be standing-waves formed between the tip and the edge-up assembled nano-emitters on the substrate plane. We further report that both light confinement and in-plane emission can be engineered by tuning the surrounding dielectric environment of the nanoplatelets. Our results lead to renewed understanding of in-plane, near-field electromagnetic signal transduction from the localized nano-emitters with profound implications in nano and quantum photonics as well as resonant optoelectronics.
(© 2023. The Author(s).)
Databáze: MEDLINE
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