2021/06/10 by Roman E. Noskov, Andrey Machnev, Noskov, Roman E. +23
Engineering · Materials Science · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Gold and Silver Nanoparticles Synthesis and Applications #Laser-Ablation Synthesis of Nanoparticles #Nonlinear Optical Materials Studies #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2106.07500
openalex publication_date 2021/06/10 · openalex created_date 2022/07/25 · openalex updated_date 2026/08/01
Mesoscopic photonic systems with tailored optical responses have great\npotential to open new frontiers in implantable biomedical devices. However,\nbiocompatibility is typically a problem, as engineering of optical properties\noften calls for using toxic compounds and chemicals, unsuitable for in vivo\napplications. Here, we demonstrate a unique approach to biofriendly delivery of\noptical resonances. We show that the controllable infusion of gold nanoseeds\ninto polycrystalline submicron vaterite spherulites gives rise to a variety of\nelectric and magnetic Mie resonances, producing a tuneable mesoscopic optical\nmetamaterial. The three-dimensional reconstruction of the spherulites\ndemonstrates the capability of controllable gold loading with volumetric\nfilling factors exceeding 28%. Owing to the biocompatibility of the\nconstitutive elements, golden vaterite paves the way to introduce designer-made\nMie resonances to cuttingedge biophotonic applications. We exemplify this\nconcept by showing efficient laser heating of gold-filled vaterite spherulites\nat red and near-infrared wavelengths, highly desirable in photothermal therapy\nand photoacoustic tomography\n