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arXiv · 1810.07916

Strong asymmetry of forward scattering effect from dielectric cubic nanoantenna in lossless media

Pavel D. Terekhov·Hadi K. Shamkhi·Egor Gurvitz·Kseniia Baryshnikova·Andrey B. Evlyukhin·Alexander S. Shalin·Alina Karabchevsky
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Abstract

Dielectric photonics platform provides unique possibilities to control light scattering via utilizing high-index dielectric nanoantennas with peculiar optical signatures. Despite the intensively growing field of all-dielectric nanophotonics, it is still unclear how surrounding media affect scattering properties of a nanoantenna with complex multipole response. Here we report on light scattering by a silicon cubic nanoparticles embedded in lossless media, supporting optical resonant response. We show that significant changes in the scattering process are governed by the electro-magnetic multipole resonances which experience spectral red-shift and broadening over the whole visible and near-infrared spectra as the indices of media increase. Most interestingly that the considered nanoantenna exhibits the broadband forward scattering in the visible and near-infrared spectral ranges due to the Kerker-effect in high-index media. The revealed effect of broadband forward scattering is essential for highly demanding applications in which the influence of the media is crucial such as health-care: sensing, treatment efficiency monitoring, and diagnostics. In addition, the insights from this study are expected to pave the way towards engineering the nanophotonic systems including but not limited to Huygens-metasurfaces in media within a single framework.

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Pavel D. Terekhov, Hadi K. Shamkhi, Egor Gurvitz, Kseniia Baryshnikova, Andrey B. Evlyukhin, Alexander S. Shalin, Alina Karabchevsky. 2019-01-18. Strong asymmetry of forward scattering effect from dielectric cubic nanoantenna in lossless media. https://doi.org/10.1364/oe.27.010924

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