Construction of visible responsive broadband absorber utilizing strong coupling between plasmon and nanocavity modes and its application to light energy conversions

Kosei Ueno, Xu Shi, Quan Sun, Tomoya Oshikiri, Keiji Sasaki, Hiroaki Misawa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Nanoparticles colloidal solutions of metals such as gold (Au) and silver (Ag) show very intense color due to localized surface plasmon resonances (LSPRs). LSPRs which are collective oscillations of conduction electrons give rise to the enhancement of electromagnetic field in the vicinity of nanoparticles and are expected as a light harvesting optical antenna for light energy conversion devices based on their spectrum tunability. We have successfully developed the plasmon-induced energy conversions such as water splitting and ammonia synthesis systems as well as solid-state plasmonic solar cells based on the principle of plasmon-induced hot electron transfer from gold nanoparticles (Au-NPs) to the semiconductor electrode.1-5 In these days, the plasmon-induced hot electron transfer has received considerable attention as a novel strategy for the solar energy conversion.6,7 However, the insufficient absorption limited its solar energy conversion efficiency for the monolayer of Au-NPs only dispersed on the semiconductor electrode. In the present study, we apply the principle of modal strong coupling to visible responsive broadband absorber for plasmonic water splitting using Au-NPs/titanium dioxide (TiO2)/Au-film electrode.

Original languageEnglish
Title of host publicationJSAP-OSA Joint Symposia, JSAP 2018
PublisherOptica Publishing Group (formerly OSA)
ISBN (Print)9784863486942
Publication statusPublished - 2018
EventJSAP-OSA Joint Symposia, JSAP 2018 - Nagoya, Japan
Duration: 2018 Sept 182018 Sept 21

Publication series

NameOptics InfoBase Conference Papers
VolumePart F125-JSAP 2018
ISSN (Electronic)2162-2701

Conference

ConferenceJSAP-OSA Joint Symposia, JSAP 2018
Country/TerritoryJapan
CityNagoya
Period18/9/1818/9/21

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