Directional Scattering of Light by Silicon Nanoparticles and Nanostructures due to High-Order Multipoles Contribution
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Abstract
High-index nanostructures and metasurfaces have been actively studied in recent years due to their promising optical properties. Subwavelength particles with high refractive index provide the possibility to excite both electric and magnetic multipole resonances, which can be spectrally tuned by changing the size, geometry, periodic arrangement, and surrounding conditions of the particles.
Here we consider both the scattering properties of single dielectric nanoparticles and optical characteristics of 2D periodic arrays. We use the method of the multipole decomposition of electromagnetic fields scattered by dielectric nanostructures to investigate their electromagnetic properties. Among other things, we describe the directional scattering by single nanoparticles and such effects like lattice invisibility effect or enhanced absorption due to high-order multipole excitations. We believe, our results could be useful for analysis and understanding of the electromagnetic properties of nanoparticle arrays and pave the way for the design of novel metasurfaces for various optical applications.
Bio
Pavel Terekhov is a PhD Student at Ben-Gurion University of the Negev, Israel and ITMO University, Saint-Petersburg, Russian Federation under the supervision of Dr. Alina Karabchevsky (BGU, IL) and Dr. Alexander Shalin (ITMO, RF). His main research interests are dielectric nanophotonics and all-dielectric metasurfaces.
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Room 2001, Birck Nanotehnology Center, Purdue. University, West Lafayette, IN