Abstract
We theoretically demonstrate and investigate plasmonically induced reflectance (PIR) in a new planar metamaterial with two completely different approaches. Here, we not only show that broken symmetry is a general strategy to create electromagnetically induced reflectance (EIR)-like effect but also demonstrate that the nanoplasmonic EIR can be realized even without broken symmetry via the excitation of the higher-order plasmonic modes in the same designed planar metamaterial. In nanophotonics, plasmonic structures enable large field strengths within small mode volumes. Therefore, combining EIR with nanoplasmonics would open up the way toward ultracompact sensors with extremely high sensitivity. In the second approach of creating the PIR of our proposed nanostructure, the restrictions on size are partially relaxed, making fabrication much easier. Their interactions and coupling between plasmonic modes are investigated in detail by analyzing field distributions and spectral responses. Also, we show that the PIR frequency position depended very sensitively on the dielectric surrounding. Furthermore, the narrow and fully modulated PIR features due to the extraordinary reduction of damping may serve for designing novel devices in the field of chemical and biomedical sensing.
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Acknowledgment
Z. Vafapour would like to express her special thanks to Dr. M. R. Forouzeshfard for useful discussion.
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Vafapour, Z., Zakery, A. New Approach of Plasmonically Induced Reflectance in a Planar Metamaterial for Plasmonic Sensing Applications. Plasmonics 11, 609–618 (2016). https://doi.org/10.1007/s11468-015-0077-1
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DOI: https://doi.org/10.1007/s11468-015-0077-1