Directing Energy into a Subwavelength Nonresonant Metasurface across the Visible Spectrum

Connell, T, Bonin, G, Easton, C, Della Gaspera, E, Chesman, A, Davis, T and Gomez, D 2019, 'Directing Energy into a Subwavelength Nonresonant Metasurface across the Visible Spectrum', ACS Applied Energy Materials, vol. 2, no. 2, pp. 1155-1161.

Document type: Journal Article
Collection: Journal Articles

Title Directing Energy into a Subwavelength Nonresonant Metasurface across the Visible Spectrum
Author(s) Connell, T
Bonin, G
Easton, C
Della Gaspera, E
Chesman, A
Davis, T
Gomez, D
Year 2019
Journal name ACS Applied Energy Materials
Volume number 2
Issue number 2
Start page 1155
End page 1161
Total pages 7
Publisher American Chemical Society
Abstract Group 10 metals (i.e., Ni, Pd, Pt) catalyze a wide range of chemical transformations, but the weak interaction of their nanoparticles with light hinders their development for photocatalytic applications. Conversely, coinage metal nanoparticles (particularly Ag and Au) exhibit intense localized surface plasmon resonances in the visible spectrum but are relatively unreactive, limiting the scope and efficiency of their photochemical processes. Here we demonstrate the design, fabrication, and characterization of a new structure containing a single layer of Pd nanoparticles that absorbs up to >98% of visible light. Furthermore, the wavelength of absorption is controlled throughout the visible range of the electromagnetic spectrum by modulating the thickness of a supporting metal oxide film. We show that the absorbed energy is concentrated in the nanoparticle layer, crucial for energy conversion applications, including photocatalysis and photothermal processes.
Subject Physical Chemistry of Materials
Nanofabrication, Growth and Self Assembly
Keyword(s) absorbers
critical coupling
hot charge carriers
DOI - identifier 10.1021/acsaem.8b01704
Copyright notice © Copyright 2019 American Chemical Society
ISSN 2574-0962
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