A New Dielectric Metamaterial Building Block with a Strong Magnetic Response in the Sub‐1.5‐Micrometer Region: Silicon Colloid Nanocavities

A new dielectric metamaterial building block based on high refractive index silicon spherical nanocavities with Mie resonances appearing in the near infrared optical region is prepared and characterized. It is demonstrated both experimentally and theoretically that a single silicon nanocavity supports well-defined and robust magnetic resonances, even in a liquid medium environment, at wavelength values up to six times larger than the cavity radius.

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