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Locating Single-Atom Optical Picocavities Using Wavelength-Multiplexed Raman Scattering

[Image: see text] Transient atomic protrusions in plasmonic nanocavities confine optical fields to sub-1-nm(3) picocavities, allowing the optical interrogation of single molecules at room temperature. While picocavity formation is linked to both the local chemical environment and optical irradiation...

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Autores principales: Griffiths, Jack, de Nijs, Bart, Chikkaraddy, Rohit, Baumberg, Jeremy J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8532146/
https://www.ncbi.nlm.nih.gov/pubmed/34692898
http://dx.doi.org/10.1021/acsphotonics.1c01100
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author Griffiths, Jack
de Nijs, Bart
Chikkaraddy, Rohit
Baumberg, Jeremy J.
author_facet Griffiths, Jack
de Nijs, Bart
Chikkaraddy, Rohit
Baumberg, Jeremy J.
author_sort Griffiths, Jack
collection PubMed
description [Image: see text] Transient atomic protrusions in plasmonic nanocavities confine optical fields to sub-1-nm(3) picocavities, allowing the optical interrogation of single molecules at room temperature. While picocavity formation is linked to both the local chemical environment and optical irradiation, the role of light in localizing the picocavity formation is unclear. Here, we combine information from thousands of picocavity events and simultaneously compare the transient Raman scattering arising from two incident pump wavelengths. Full analysis of the data set suggests that light suppresses the local effective barrier height for adatom formation and that the initial barrier height is decreased by reduced atomic coordination numbers near facet edges. Modeling the system also resolves the frequency-dependent picocavity field enhancements supported by these atomic scale features.
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spelling pubmed-85321462021-10-22 Locating Single-Atom Optical Picocavities Using Wavelength-Multiplexed Raman Scattering Griffiths, Jack de Nijs, Bart Chikkaraddy, Rohit Baumberg, Jeremy J. ACS Photonics [Image: see text] Transient atomic protrusions in plasmonic nanocavities confine optical fields to sub-1-nm(3) picocavities, allowing the optical interrogation of single molecules at room temperature. While picocavity formation is linked to both the local chemical environment and optical irradiation, the role of light in localizing the picocavity formation is unclear. Here, we combine information from thousands of picocavity events and simultaneously compare the transient Raman scattering arising from two incident pump wavelengths. Full analysis of the data set suggests that light suppresses the local effective barrier height for adatom formation and that the initial barrier height is decreased by reduced atomic coordination numbers near facet edges. Modeling the system also resolves the frequency-dependent picocavity field enhancements supported by these atomic scale features. American Chemical Society 2021-10-04 2021-10-20 /pmc/articles/PMC8532146/ /pubmed/34692898 http://dx.doi.org/10.1021/acsphotonics.1c01100 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Griffiths, Jack
de Nijs, Bart
Chikkaraddy, Rohit
Baumberg, Jeremy J.
Locating Single-Atom Optical Picocavities Using Wavelength-Multiplexed Raman Scattering
title Locating Single-Atom Optical Picocavities Using Wavelength-Multiplexed Raman Scattering
title_full Locating Single-Atom Optical Picocavities Using Wavelength-Multiplexed Raman Scattering
title_fullStr Locating Single-Atom Optical Picocavities Using Wavelength-Multiplexed Raman Scattering
title_full_unstemmed Locating Single-Atom Optical Picocavities Using Wavelength-Multiplexed Raman Scattering
title_short Locating Single-Atom Optical Picocavities Using Wavelength-Multiplexed Raman Scattering
title_sort locating single-atom optical picocavities using wavelength-multiplexed raman scattering
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8532146/
https://www.ncbi.nlm.nih.gov/pubmed/34692898
http://dx.doi.org/10.1021/acsphotonics.1c01100
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