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Photo-thermoelectric conversion of plasmonic nanohole array

Photo-thermoelectric conversion of plasmonic nanohole array
Photo-thermoelectric conversion of plasmonic nanohole array
Plasmonic photo-thermoelectric conversion offers an alternative photodetection mechanism that is not restricted by semiconductor bandgaps. Here, we report a plasmonic photodetector consisting of an ultra-thin silver film with nanohole array, whose photodetection mechanism is based on thermoelectric conversion triggered by plasmonic local heating. The detector exhibits a maximum photocurrent at the wavelength of the surface plasmon polaritons, determined by the periodicity of the nanoholes. Hence, the response wavelength of the detector can be controlled via the morphological parameters of the nanohole pattern. The contribution of plasmonic local heating to thermoelectric conversion is verified experimentally and numerically, enabling discussion on the mechanisms governing light detection. These results provide a starting point for the development of other nanoscale photodetectors.
Nanohole, Photodetector, Plasmon, Plasmonic local heat, Silver film, Thermoelectric conversion
2076-3417
Miwa, Kaito
ce0dac89-56ff-469b-b4ef-53ffdac96aca
Ebihara, Hiroki
031378d8-8bd7-4d6f-92a8-9b96ff1ea474
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Kubo, Wakana
453b4e5c-4481-48b5-8f84-ca30ca2224e4
Miwa, Kaito
ce0dac89-56ff-469b-b4ef-53ffdac96aca
Ebihara, Hiroki
031378d8-8bd7-4d6f-92a8-9b96ff1ea474
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Kubo, Wakana
453b4e5c-4481-48b5-8f84-ca30ca2224e4

Miwa, Kaito, Ebihara, Hiroki, Fang, Xu and Kubo, Wakana (2020) Photo-thermoelectric conversion of plasmonic nanohole array. Applied Sciences, 10 (8), [2681]. (doi:10.3390/app10082681).

Record type: Article

Abstract

Plasmonic photo-thermoelectric conversion offers an alternative photodetection mechanism that is not restricted by semiconductor bandgaps. Here, we report a plasmonic photodetector consisting of an ultra-thin silver film with nanohole array, whose photodetection mechanism is based on thermoelectric conversion triggered by plasmonic local heating. The detector exhibits a maximum photocurrent at the wavelength of the surface plasmon polaritons, determined by the periodicity of the nanoholes. Hence, the response wavelength of the detector can be controlled via the morphological parameters of the nanohole pattern. The contribution of plasmonic local heating to thermoelectric conversion is verified experimentally and numerically, enabling discussion on the mechanisms governing light detection. These results provide a starting point for the development of other nanoscale photodetectors.

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Photo-Thermoelectric Conversion of Plasmonic Nanohole Array_XF - Accepted Manuscript
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Accepted/In Press date: 7 April 2020
Published date: 13 April 2020
Keywords: Nanohole, Photodetector, Plasmon, Plasmonic local heat, Silver film, Thermoelectric conversion

Identifiers

Local EPrints ID: 443870
URI: http://eprints.soton.ac.uk/id/eprint/443870
ISSN: 2076-3417
PURE UUID: fa9355ab-a35a-47d4-94e8-3e0b154282fa
ORCID for Xu Fang: ORCID iD orcid.org/0000-0003-1735-2654

Catalogue record

Date deposited: 15 Sep 2020 16:34
Last modified: 08 Oct 2020 16:33

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Contributors

Author: Kaito Miwa
Author: Hiroki Ebihara
Author: Xu Fang ORCID iD
Author: Wakana Kubo

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