Open AccessTwo‐dimensional photonic metasurfaces for slow light‐controlled photocatalysis
Author(s) -
Capitolis Jérôme,
Hamandi Marwa,
Hochedel Marion,
ElJallal Said,
Drouard Emmanuel,
Chevalier Céline,
Leclercq JeanLouis,
Penuelas José,
Dursap Thomas,
Brottet Solène,
Devif Brice,
Nguyen Hai Son,
Berhault Gilles,
Chovelon JeanMarc,
Ferronato Corinne,
Guillard Chantal,
Puzenat Eric,
CrespoMonteiro Nicolas,
Reynaud Stephanie,
Jourlin Yves,
Bugnet Matthieu,
Seassal Christian
Publication year - 2022
Publication title -
nano select
Language(s) - English
Resource type - Journals
ISSN - 2688-4011
DOI - 10.1002/nano.202100106
Subject(s) - photocatalysis , photonics , materials science , anatase , nanostructure , photonic crystal , degradation (telecommunications) , semiconductor , artificial photosynthesis , wavelength , optoelectronics , nanotechnology , absorption (acoustics) , chemical engineering , catalysis , chemistry , composite material , computer science , telecommunications , biochemistry , engineering
Photocatalysis using semiconductor materials like titania (TiO 2 ) is a key method for environmental purification or solar fuel generation. Nanostructures that maximize incident light absorption are highly desired to enhance depollution rate or solar‐to‐fuel conversion efficiency in limited volumes of catalysts. Here, we report on structural and optical properties of metasurfaces based on a 20 nm thick anatase layer conformally deposited onto a wavelength‐scale two‐dimensional periodic photonic lattice. We investigate the NO degradation using such metasurfaces, and evaluate the impact of the patterning on photocatalytic activities between 340 and 400 nm. In the 380–385 nm range, the mean photochemical efficiency is increased by a factor up to 5.7 compared to flat references, with an overall three‐fold enhancement within the whole spectral range of interest. This approach can be applied to numerous types of systems by varying active materials, leading to substantial improvements in air/water depollution, water splitting or artificial photosynthesis processes.