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Femtosecond Autocorrelation of Localized Surface Plasmons

Plasmon electronic dephasing lifetime is one of the most important characteristics of localized surface plasmons, which is crucial both for understanding the related photophysics and for their applications in photonic and optoelectronic devices. This lifetime is generally shorter than 100 fs and mea...

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Autores principales: Yi, Ruizhi, Wu, Wenwen, Zhang, Xinping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10179925/
https://www.ncbi.nlm.nih.gov/pubmed/37177058
http://dx.doi.org/10.3390/nano13091513
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author Yi, Ruizhi
Wu, Wenwen
Zhang, Xinping
author_facet Yi, Ruizhi
Wu, Wenwen
Zhang, Xinping
author_sort Yi, Ruizhi
collection PubMed
description Plasmon electronic dephasing lifetime is one of the most important characteristics of localized surface plasmons, which is crucial both for understanding the related photophysics and for their applications in photonic and optoelectronic devices. This lifetime is generally shorter than 100 fs and measured using the femtosecond pump–probe technique, which requires femtosecond laser amplifiers delivering pulses with a duration even as short as 10 fs. This implies a large-scale laser system with complicated pulse compression schemes, introducing high-cost and technological challenges. Meanwhile, the strong optical pulse from an amplifier induces more thermal-related effects, disturbing the precise resolution of the pure electronic dephasing lifetime. In this work, we use a simple autocorrelator design and integrate it with the sample of plasmonic nanostructures, where a femtosecond laser oscillator supplies the incident pulses for autocorrelation measurements. Thus, the measured autocorrelation trace carries the optical modulation on the incident pulses. The dephasing lifetime can be thus determined by a comparison between the theoretical fittings to the autocorrelation traces with and without the plasmonic modulation. The measured timescale for the autocorrelation modulation is an indirect determination of the plasmonic dephasing lifetime. This supplies a simple, rapid, and low-cost method for quantitative characterization of the ultrafast optical response of localized surface plasmons.
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spelling pubmed-101799252023-05-13 Femtosecond Autocorrelation of Localized Surface Plasmons Yi, Ruizhi Wu, Wenwen Zhang, Xinping Nanomaterials (Basel) Article Plasmon electronic dephasing lifetime is one of the most important characteristics of localized surface plasmons, which is crucial both for understanding the related photophysics and for their applications in photonic and optoelectronic devices. This lifetime is generally shorter than 100 fs and measured using the femtosecond pump–probe technique, which requires femtosecond laser amplifiers delivering pulses with a duration even as short as 10 fs. This implies a large-scale laser system with complicated pulse compression schemes, introducing high-cost and technological challenges. Meanwhile, the strong optical pulse from an amplifier induces more thermal-related effects, disturbing the precise resolution of the pure electronic dephasing lifetime. In this work, we use a simple autocorrelator design and integrate it with the sample of plasmonic nanostructures, where a femtosecond laser oscillator supplies the incident pulses for autocorrelation measurements. Thus, the measured autocorrelation trace carries the optical modulation on the incident pulses. The dephasing lifetime can be thus determined by a comparison between the theoretical fittings to the autocorrelation traces with and without the plasmonic modulation. The measured timescale for the autocorrelation modulation is an indirect determination of the plasmonic dephasing lifetime. This supplies a simple, rapid, and low-cost method for quantitative characterization of the ultrafast optical response of localized surface plasmons. MDPI 2023-04-28 /pmc/articles/PMC10179925/ /pubmed/37177058 http://dx.doi.org/10.3390/nano13091513 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yi, Ruizhi
Wu, Wenwen
Zhang, Xinping
Femtosecond Autocorrelation of Localized Surface Plasmons
title Femtosecond Autocorrelation of Localized Surface Plasmons
title_full Femtosecond Autocorrelation of Localized Surface Plasmons
title_fullStr Femtosecond Autocorrelation of Localized Surface Plasmons
title_full_unstemmed Femtosecond Autocorrelation of Localized Surface Plasmons
title_short Femtosecond Autocorrelation of Localized Surface Plasmons
title_sort femtosecond autocorrelation of localized surface plasmons
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10179925/
https://www.ncbi.nlm.nih.gov/pubmed/37177058
http://dx.doi.org/10.3390/nano13091513
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