Abstract
We theoretically show that a polarization-independent optical band-stop filter operation can be performed by a two-dimensional sub-wavelength array of symmetric cross-shaped plasmonic nanoantennas. The proposed filter’s optical properties can be controlled by varying the size and periodicity of the plasmonic nanoantennas. So, this can be used to design filters in many frequency ranges of interest. In addition, the filter is simply constructed as a coating with only 30-nm thickness, which is much thinner than the operation wavelength, and thus facilitates the fabrication and further large-scale optical integration.
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Acknowledgements
This work was supported by the Danish Council for Independent Research (the FTP project ANAP, contract no. 09-072949), the State Key Program for Basic Research of China (No. 2012CB933501) and the National Natural Science Foundation of China (Grant Nos. 61177051, 61107042 and 61205087).
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Zhu, Z.H., Han, Z.H. & Bozhevolnyi, S.I. Wide-bandwidth polarization-independent optical band-stop filter based on plasmonic nanoantennas. Appl. Phys. A 110, 71–75 (2013). https://doi.org/10.1007/s00339-012-7432-2
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DOI: https://doi.org/10.1007/s00339-012-7432-2