Abstract
We theoretically design and experimentally demonstrate a multilayered optical magnetic metamaterial working at multiple frequencies simultaneously. The metamaterial is constructed with tapered ellipsoidal metal-dielectric-metal particles (EMDMPs), which is obtained through alternately depositing multiple layers of Ag and SiO2 films on a dielectric template of ellipsoidal nanohole arrays created by holographic lithography and lift-off procedure. Transmission and reflection spectra measurements reveal that the metamaterial exhibits multiband magnetic resonances at near infrared due to the size variation of EMDMPs in depositing and lift-off procedures. Our results may prove a step towards the construction of realistic metamaterials for various photonics applications.
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