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In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux

Nonradiative surface plasmon decay produces highly energetic electron–hole pairs with desirable characteristics, but the measurement and harvesting of nonequilibrium hot holes remain challenging due to ultrashort lifetime and diffusion length. Here, the direct observation of LSPR‐driven hot holes cr...

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Autores principales: Lee, Hyunhwa, Song, Kyoungjae, Lee, Moonsang, Park, Jeong Young
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7578898/
https://www.ncbi.nlm.nih.gov/pubmed/33101854
http://dx.doi.org/10.1002/advs.202001148
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author Lee, Hyunhwa
Song, Kyoungjae
Lee, Moonsang
Park, Jeong Young
author_facet Lee, Hyunhwa
Song, Kyoungjae
Lee, Moonsang
Park, Jeong Young
author_sort Lee, Hyunhwa
collection PubMed
description Nonradiative surface plasmon decay produces highly energetic electron–hole pairs with desirable characteristics, but the measurement and harvesting of nonequilibrium hot holes remain challenging due to ultrashort lifetime and diffusion length. Here, the direct observation of LSPR‐driven hot holes created in a Au nanoprism/p‐GaN platform using photoconductive atomic force microscopy (pc‐AFM) is demonstrated. Significant enhancement of photocurrent in the plasmonic platforms under light irradiation is revealed, providing direct evidence of plasmonic hot hole generation. Experimental and numerical analysis verify that a confined |E|‐field surrounding a single Au nanoprism spurs resonant coupling between localized surface plasmon resonance (LSPR) and surface charges, thus boosting hot hole generation. Furthermore, geometrical and size dependence on the extraction of LSPR‐driven hot holes suggests an optimized pathway for their efficient utilization. The direct visualization of hot hole flow at the nanoscale provides significant opportunities for harnessing the underlying nature and potential of plasmonic hot holes.
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spelling pubmed-75788982020-10-23 In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux Lee, Hyunhwa Song, Kyoungjae Lee, Moonsang Park, Jeong Young Adv Sci (Weinh) Full Papers Nonradiative surface plasmon decay produces highly energetic electron–hole pairs with desirable characteristics, but the measurement and harvesting of nonequilibrium hot holes remain challenging due to ultrashort lifetime and diffusion length. Here, the direct observation of LSPR‐driven hot holes created in a Au nanoprism/p‐GaN platform using photoconductive atomic force microscopy (pc‐AFM) is demonstrated. Significant enhancement of photocurrent in the plasmonic platforms under light irradiation is revealed, providing direct evidence of plasmonic hot hole generation. Experimental and numerical analysis verify that a confined |E|‐field surrounding a single Au nanoprism spurs resonant coupling between localized surface plasmon resonance (LSPR) and surface charges, thus boosting hot hole generation. Furthermore, geometrical and size dependence on the extraction of LSPR‐driven hot holes suggests an optimized pathway for their efficient utilization. The direct visualization of hot hole flow at the nanoscale provides significant opportunities for harnessing the underlying nature and potential of plasmonic hot holes. John Wiley and Sons Inc. 2020-08-06 /pmc/articles/PMC7578898/ /pubmed/33101854 http://dx.doi.org/10.1002/advs.202001148 Text en © 2020 The Authors. Published by Wiley‐VCH GmbH This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Full Papers
Lee, Hyunhwa
Song, Kyoungjae
Lee, Moonsang
Park, Jeong Young
In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux
title In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux
title_full In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux
title_fullStr In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux
title_full_unstemmed In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux
title_short In Situ Visualization of Localized Surface Plasmon Resonance‐Driven Hot Hole Flux
title_sort in situ visualization of localized surface plasmon resonance‐driven hot hole flux
topic Full Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7578898/
https://www.ncbi.nlm.nih.gov/pubmed/33101854
http://dx.doi.org/10.1002/advs.202001148
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