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arXiv · 2103.15092

Titania-Based Spherical Mie Resonators Elaborated by High-Throughput Aerosol Spray: Single Object Investigation

Simona Checcucci·Thomas Bottein·Jean-Benoit Claude·Thomas Wood·Magali Putero·Luc Favre·Massimo Gurioli·Marco Abbarchi·David Grosso
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Abstract

In the framework of photonics with all-dielectric nanoantennas, sub-micro-metric spheres can be exploited for a plethora of applications including vanishing back-scattering, enhanced directivity of a light emitter, beam steering, and large Purcell factors. Here, the potential of a high-throughput fabrication method based on aerosol-spray is shown to form quasi-perfect sub-micrometric spheres of polycrystalline TiO 2 . Spectroscopic investigation of light scattering from individual particles reveals sharp resonances in agreement with Mie theory, neat structural colors, and a high directivity. Owing to the high permittivity and lossless material in use, this method opens the way toward the implementation of isotropic meta-materials and forward-directional sources with magnetic responses at visible and near-UV frequencies, not accessible with conventional Si- and Ge-based Mie resonators.

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Simona Checcucci, Thomas Bottein, Jean-Benoit Claude, Thomas Wood, Magali Putero, Luc Favre, Massimo Gurioli, Marco Abbarchi, David Grosso. 2021-03-28. Titania-Based Spherical Mie Resonators Elaborated by High-Throughput Aerosol Spray: Single Object Investigation. https://doi.org/10.1002/adfm.201801958

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