Spectral control in anisotropic resonance-domain metamaterials |
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Authors: | Husu Hannu Mäkitalo Jouni Siikanen Roope Genty Goëry Pietarinen Henna Lehtolahti Joonas Laukkanen Janne Kuittinen Markku Kauranen Martti |
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Institution: | Department of Physics, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland. hannu.husu@tut.fi |
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Abstract: | We introduce a concept to control the spectral and dichroic properties of metamaterials. The approach is based on anisotropic metal nanoparticles and on varying their mutual orientation in a periodic lattice. Even seemingly inconsequential changes in particle ordering strongly modify the dichroic properties of the arrays and result in either very narrow resonances or ultrabroad extinction ranges. The results arise from long-range diffractive coupling between the particles, as determined by the dependence of the array unit cell size on particle ordering. |
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