Impact of chemical interface damping on surface plasmon dephasing

Faraday Discussions
Andrew J TherrienPhillip Christopher

Abstract

The excellent light harvesting ability of plasmonic nanoparticles makes them promising materials for a variety of technologies that rely on the conversion of photons to energetic charge carriers. In such applications, including photovoltaics and photocatalysis, the excitation of surface plasmons must induce charge transfer across the metal-adsorbate or metal-semiconductor interface. However, there is currently a lack of molecular level understanding of how the presence of a chemical interface impacts surface plasmon dephasing pathways. Here, we report an approach to quantitatively measure the influence of molecular adsorption on the spectral shape and intensity of the extinction, scattering, and absorption cross-sections for nanostructured plasmonic surfaces. This is demonstrated for the case of thiophenol adsorption on lithographically patterned gold nanodisk arrays. The results show that the formation of a chemical interface between thiophenol and Au causes surface plasmons to decay more prominently through photon absorption rather than photon scattering, as compared to the bare metal. We propose that this effect is a result of the introduction of adsorbate-induced allowable electronic transitions at the interface, which faci...Continue Reading

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Citations

Sep 17, 2020·The Journal of Chemical Physics·Robin SchürmannIlko Bald
Jan 9, 2021·The Journal of Chemical Physics·Ora BittonGilad Haran
Apr 1, 2021·Accounts of Chemical Research·Stephen A Lee, Stephan Link
Nov 20, 2020·Chemical Reviews·Julia Westermayr, Philipp Marquetand
May 7, 2020·Nano Letters·Yawei LiuTianquan Lian
Jun 17, 2020·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Sian Sloan-DennisonZachary D Schultz
Dec 7, 2019·ACS Nano·Daniel C Ratchford
Oct 6, 2021·Nature Nanotechnology·Eitan OksenbergErik C Garnett
Feb 4, 2022·Nano Letters·Pritam KhanChristophe Silien

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Methods Mentioned

BETA
surface plasmon resonance
electron scattering
Scanning electron microscopy
saturation adsorption
light harvesting
surface plasmon

Software Mentioned

Lumerical FDTD Solutions

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