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Near-field imaging of point dipole with silver superlens

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Abstract

Making use of exact and quasistatic expressions for the field in near-field imaging of a point dipole by a thin silver slab, we calculate the point-spread function and the associated image resolution. We show that the resolution, which depends on the silver slab thickness and the dipole orientation, generally is better than the conventional diffraction limit and can be as high as λ/8. The results substantially agree with recent theoretical and experimental studies on 2D objects.

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Authors and Affiliations

  1. Department of Applied Physics, Aalto University, P.O. Box 13500, 00076, Aalto, Finland

    T. Hakkarainen, T. Setälä & A. T. Friberg

  2. Department of Physics and Mathematics, University of Eastern Finland, P.O. Box 111, 80101, Joensuu, Finland

    A. T. Friberg

  3. Department of Microelectronics and Applied Physics, Royal Institute of Technology (KTH), Electrum 229, 164 40, Kista, Sweden

    A. T. Friberg

Authors
  1. T. Hakkarainen
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  2. T. Setälä
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  3. A. T. Friberg
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Correspondence to T. Hakkarainen.

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Hakkarainen, T., Setälä, T. & Friberg, A.T. Near-field imaging of point dipole with silver superlens. Appl. Phys. B 101, 731–734 (2010). https://doi.org/10.1007/s00340-010-4124-5

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  • DOI: https://doi.org/10.1007/s00340-010-4124-5

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