Monodisperse silicon nanocavities and photonic crystals with magnetic response in the optical region

Lei Shi, Justin T Harris, Roberto Fenollosa, Isabelle Rodriguez, Xiaotang Lu, Brian A Korgel and Francisco Meseguer ()
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Lei Shi: Centro de Tecnologias Fisicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politecnica de Valencia
Justin T Harris: Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin
Roberto Fenollosa: Centro de Tecnologias Fisicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politecnica de Valencia
Isabelle Rodriguez: Centro de Tecnologias Fisicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politecnica de Valencia
Xiaotang Lu: Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin
Brian A Korgel: Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin
Francisco Meseguer: Centro de Tecnologias Fisicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politecnica de Valencia

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract It is generally accepted that the magnetic component of light has a minor role in the light–matter interaction. The recent discovery of metamaterials has broken this traditional understanding, as both the electric and the magnetic field are key ingredients in metamaterials. The top–down technology used so far employs noble metals with large intrinsic losses. Here we report on a bottom–up approach for processing metamaterials based on suspensions of monodisperse full dielectric silicon nanocavities with a large magnetic response in the near-infrared region. Experimental results and theory show that silicon-colloid-based liquid suspensions and photonic crystals made of two-dimensional arrays of particles have strong magnetic response in the near-infrared region with small optical losses. Our findings might have important implications in the bottom–up processing of large-area low-loss metamaterials working in the near-infrared region.

Date: 2013
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DOI: 10.1038/ncomms2934

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