Broadband forward light scattering by architectural design of core–shell silicon particles

Autor: Cyril Aymonier, Philippe Barois, Brian A. Korgel, Sabrina Lacomme, Glenna L. Drisko, Alexandre Baron, Taizhi Jiang, Yuebing Zheng, Jie Fang, Maria Letizia De Marco
Přispěvatelé: Teulet, Nadine, Advanced Materials by Design - - AMADEus2010 - ANR-10-LABX-0042 - LABX - VALID, Initiative d'excellence de l'Université de Bordeaux - - IDEX BORDEAUX2010 - ANR-10-IDEX-0003 - IDEX - VALID, Développment d'une infrastructure française distribuée coordonnée - - France-BioImaging2010 - ANR-10-INBS-0004 - INBS - VALID, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), McKetta Department of Chemical Engineering, University of Texas, Walker Department of Chemical Engineering, Bordeaux Imaging Center (BIC), Université de Bordeaux (UB)-Institut François Magendie-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), the LabEx AMADEus (ANR-10-LABX-42) in the framework of IdEx Bordeaux (ANR-10-IDEX-03-02), i.e., the Investissements d'Avenir program of the French government managed by the Agence Nationale de la Recherche. The Robert A. Welch Foundation (F-1464) and the National Science Foundation through the Center for Dynamics and Control of Materials, an NSF MRSEC under Cooperative Agreement No. DMR-1720595. J.F. and the financial support of the National Science Foundation (NSF-ECCS-2001650), and the National Institute of General Medical Sciences of the National Institutes of Health (DP2GM128446)., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), ANR-10-INBS-0004,France-BioImaging,Développment d'une infrastructure française distribuée coordonnée(2010), Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut François Magendie-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Advanced Functional Materials
Advanced Functional Materials, 2021, 31 (26), 2100915 (11 p.). ⟨10.1002/adfm.202100915⟩
Advanced Functional Materials, Wiley, 2021, 31 (26), 2100915 (11 p.). ⟨10.1002/adfm.202100915⟩
ISSN: 1616-301X
1616-3028
DOI: 10.1002/adfm.202100915⟩
Popis: International audience; A goal in the field of nanoscale optics is the fabrication of nanostructures with strong directional light scattering at visible frequencies. Here, we demonstrate the synthesis of Mie-resonant coreshell particles with overlapping electric and magnetic dipole resonances in the visible spectrum. The core consists of silicon surrounded by a lower index silicon oxynitride (SiOxNy) shell with an adjustable thickness. Optical spectroscopies coupled to Mie theory calculations give the first experimental evidence that the relative position and intensity of the magnetic and electric dipole resonances are tuned by changing the core-shell architecture. Specifically, coating a high-index particle with a low-index shell coalesces the dipoles, while maintaining a high scattering efficiency, thus generating broadband forward scattering. This synthetic strategy opens a route towards metamaterial fabrication with unprecedented control over visible light manipulation.
Databáze: OpenAIRE
Externí odkaz: