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Electric Field Enhancement Around Gold Tip Optical Antenna

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Abstract

This paper provides a new design of gold tip optical antenna based on a specific geometry, and then the change of enhancement of the electric field of plane wave laser excitation with 400 to 700 nm around of the optical antenna are simulated. Changing the geometry of optical antenna includes creating circular gratings with the periods 200 and 300 nm on the shaft of antenna. With the exerting of laser light to the place of these gratings, the distribution of enhancement of the electric field in a plane perpendicular to the shaft has been acquired. Finally, the optimized value for the maximum enhancement at the period of 293 nm is obtained.

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Acknowledgments

The authors wish to thank Prof. M. Kh. Salakhov for the helpful discussions. We are also grateful to the Department of Optics and Nanophotonics, Kazan Federal University for giving us access to their equipment.

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Authors and Affiliations

  1. Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kazan, Russia

    Mehdi Zohrabi & Mohammad Reza Mohebbifar

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  1. Mehdi Zohrabi
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  2. Mohammad Reza Mohebbifar
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Correspondence to Mehdi Zohrabi.

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Zohrabi, M., Mohebbifar, M.R. Electric Field Enhancement Around Gold Tip Optical Antenna. Plasmonics 10, 887–892 (2015). https://doi.org/10.1007/s11468-014-9876-z

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  • DOI: https://doi.org/10.1007/s11468-014-9876-z

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