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Broadband and Spectrally Selective Photothermal Conversion through Nanocluster Assembly of Disordered Plasmonic Metasurfaces
Ji-an Chen,
Yuyuan Qin,
Yubiao Niu,
Peng Mao 
,
Fengqi Song ,
Richard Palmer ,
Guanghou Wang,
Shuang Zhang ,
Min Han
,
Fengqi Song ,
Richard Palmer ,
Guanghou Wang,
Shuang Zhang ,
Min Han
Nano Letters, Volume: 23, Issue: 15, Pages: 7236 - 7243
Swansea University Authors:
Yubiao Niu, Richard Palmer
-
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DOI (Published version): 10.1021/acs.nanolett.3c01328
Abstract
Plasmonic metasurfaces have been realized for efficient light absorption, thereby leading to photothermal conversion through nonradiative decay of plasmonic modes. However, current plasmonic metasurfaces suffer from inaccessible spectral ranges, costly and time-consuming nanolithographic top-down te...
| Published in: | Nano Letters |
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| ISSN: | 1530-6984 1530-6992 |
| Published: |
American Chemical Society (ACS)
2023
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa64521 |
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| Abstract: |
Plasmonic metasurfaces have been realized for efficient light absorption, thereby leading to photothermal conversion through nonradiative decay of plasmonic modes. However, current plasmonic metasurfaces suffer from inaccessible spectral ranges, costly and time-consuming nanolithographic top-down techniques for fabrication, and difficulty of scale-up. Here, we demonstrate a new type of disordered metasurface created by densely packing plasmonic nanoclusters of ultrasmall size on a planar optical cavity. The system either operates as a broadband absorber or offers a reconfigurable absorption band right across the visible region, resulting in continuous wavelength-tunable photothermal conversion. We further present a method to measure the temperature of plasmonic metasurfaces via surface-enhanced Raman spectroscopy (SERS), by incorporating single-walled carbon nanotubes (SWCNTs) as an SERS probe within the metasurfaces. Our disordered plasmonic system, generated by a bottom-up process, offers excellent performance and compatibility with efficient photothermal conversion. Moreover, it also provides a novel platform for various hot-electron and energy-harvesting functionalities. |
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| Keywords: |
plasmonic metasurface, nanocluster assembly, photothermal conversion, SERS, disordered nanostructure, light absorber |
| College: |
Faculty of Science and Engineering |
| Issue: |
15 |
| Start Page: |
7236 |
| End Page: |
7243 |