Dynamics of hot carriers in plasmonic heterostructures
Understanding and optimising the mechanisms of generation and extraction of hot carriers in plasmonic heterostructures is important for applications in new types of photodetectors, photochemistry and photocatalysis, as well as nonlinear optics. Here, we show using transient dynamic measurements that...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2021-08-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2021-0278 |
| _version_ | 1818930533422333952 |
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| author | Bykov Anton Yu. Roth Diane J. Sartorello Giovanni Salmón-Gamboa Jorge U. Zayats Anatoly V. |
| author_facet | Bykov Anton Yu. Roth Diane J. Sartorello Giovanni Salmón-Gamboa Jorge U. Zayats Anatoly V. |
| author_sort | Bykov Anton Yu. |
| collection | DOAJ |
| description | Understanding and optimising the mechanisms of generation and extraction of hot carriers in plasmonic heterostructures is important for applications in new types of photodetectors, photochemistry and photocatalysis, as well as nonlinear optics. Here, we show using transient dynamic measurements that the relaxation of the excited hot-carriers in Au/Pt hetero-nanostructures is accelerated through the transfer pathway from Au, where they are generated, to Pt nanoparticles, which act as a hot-electron sink. The influence of the environment on the dynamics was also demonstrated. The time-resolved photoluminescence measurements confirm the modified hot-electron dynamics, revealing quenching of the photoluminescence signal from Au nanoparticles in the presence of Pt and an increased photoluminescence lifetime. These observations are signatures of the improved extraction efficiency of hot-carriers by the Au/Pt heterostructures. The results give insight into the time-dependent behaviour of excited compound nanoscale systems and provide a way of controlling the relaxation mechanisms involved, with important consequences for engineering nonlinear optical response and hot-carrier-assisted photochemistry. |
| first_indexed | 2024-12-20T04:02:13Z |
| format | Article |
| id | doaj.art-44c366c1867e41e480707e9a610466b8 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-12-20T04:02:13Z |
| publishDate | 2021-08-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-44c366c1867e41e480707e9a610466b82022-12-21T19:54:09ZengDe GruyterNanophotonics2192-86142021-08-0110112929293810.1515/nanoph-2021-0278Dynamics of hot carriers in plasmonic heterostructuresBykov Anton Yu.0Roth Diane J.1Sartorello Giovanni2Salmón-Gamboa Jorge U.3Zayats Anatoly V.4Department of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKDepartment of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKDepartment of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKDepartment of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKDepartment of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, UKUnderstanding and optimising the mechanisms of generation and extraction of hot carriers in plasmonic heterostructures is important for applications in new types of photodetectors, photochemistry and photocatalysis, as well as nonlinear optics. Here, we show using transient dynamic measurements that the relaxation of the excited hot-carriers in Au/Pt hetero-nanostructures is accelerated through the transfer pathway from Au, where they are generated, to Pt nanoparticles, which act as a hot-electron sink. The influence of the environment on the dynamics was also demonstrated. The time-resolved photoluminescence measurements confirm the modified hot-electron dynamics, revealing quenching of the photoluminescence signal from Au nanoparticles in the presence of Pt and an increased photoluminescence lifetime. These observations are signatures of the improved extraction efficiency of hot-carriers by the Au/Pt heterostructures. The results give insight into the time-dependent behaviour of excited compound nanoscale systems and provide a way of controlling the relaxation mechanisms involved, with important consequences for engineering nonlinear optical response and hot-carrier-assisted photochemistry.https://doi.org/10.1515/nanoph-2021-0278carrier dynamicshot electronsplasmonic nanoparticles |
| spellingShingle | Bykov Anton Yu. Roth Diane J. Sartorello Giovanni Salmón-Gamboa Jorge U. Zayats Anatoly V. Dynamics of hot carriers in plasmonic heterostructures Nanophotonics carrier dynamics hot electrons plasmonic nanoparticles |
| title | Dynamics of hot carriers in plasmonic heterostructures |
| title_full | Dynamics of hot carriers in plasmonic heterostructures |
| title_fullStr | Dynamics of hot carriers in plasmonic heterostructures |
| title_full_unstemmed | Dynamics of hot carriers in plasmonic heterostructures |
| title_short | Dynamics of hot carriers in plasmonic heterostructures |
| title_sort | dynamics of hot carriers in plasmonic heterostructures |
| topic | carrier dynamics hot electrons plasmonic nanoparticles |
| url | https://doi.org/10.1515/nanoph-2021-0278 |
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