We present metamaterials based on dielectric slab with perforated identical cylindrical clusters with perforated holes, which allow to support the toroidal dipolar response due to Mie-resonances in each hole. Note that proposed metamaterial is technologically simple for fabrication in optical frequency range.
Metamaterial can be fabricated by several methods. For instance, we may apply the molecular beam epitaxy method for deposition of Si or GaAs layers, which have permittivity close to 16. Next step, nanometer/micrometer holes are perforated by focused ion beam method or laser cutting method. Fundamental difference of proposed metamaterial is technological fabrication process. Classically all- dielectric optical metamaterials consist of nano-spheres or nano-discs, which are complicated for fabrication, while our idea and suggested metamaterials are promising prototype of various optical/THz all-dielectic devices as sensor, nano-antennas elements for nanophotonics.
Ivan Stenishchev, Alexey A. Basharin, and Alexey A. Basharin, "All-dielectric perforated metamaterials with toroidal dipolar response (Conference Presentation)," Proc. SPIE 10227, Metamaterials XI, 102270L (Presented at SPIE Optics + Optoelectronics: April 27, 2017; Published: 8 June 2017); https://doi.org/10.1117/12.2265899.5463341868001.
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