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Extraordinary Transmission of Light Through Freestanding Au Films with Subwavelength Apertures and Double Slits

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Abstract

We demonstrated the extraordinary transmission of light through a freestanding Au thin film with a 7×7 subwavelength aperture array and double slits. Firstly, we observed the dependence of the change in the light transmission through a plasmonic structure on the pitch size of the aperture array. Also, we fabricated a freestanding Au thin film to avoid the effects of absorption and reflection of the substrate. We perforated the 7×7 subwavelength hole array on the Au film for extraordinary optical transmission caused by the electric field enhancement from the structures. Additionally, we designed a hybrid structure composed of 7×7 subwavelength apertures and double slits to enhance the transmission of the light. The normalized-to-area transmission of the hybrid structures was approximately five times greater than that of the structures without double slits.

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Authors and Affiliations

  1. Department of Physics, Incheon National University, Incheon, 22012, Korea

    Hyuntae Kim & Soobong Choi

  2. Research Center for Nanobio Science, SunMoon University, Ahsan, 31460, Korea

    Seong Soo Choi

  3. Department of Physics and Astronomy and Center for Atom Scale Electromagnetism, Seoul National University, Seoul, 08826, Korea

    Woongkyu Park

  4. School of Mechanical Engineering, Kyungpook National University, Daegu, 41566, Korea

    Clare Chisu Byeon

Authors
  1. Hyuntae Kim
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  2. Soobong Choi
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  3. Seong Soo Choi
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  4. Woongkyu Park
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  5. Clare Chisu Byeon
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Correspondence to Soobong Choi.

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Kim, H., Choi, S., Choi, S.S. et al. Extraordinary Transmission of Light Through Freestanding Au Films with Subwavelength Apertures and Double Slits. J. Korean Phys. Soc. 74, 164–167 (2019). https://doi.org/10.3938/jkps.74.164

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  • DOI: https://doi.org/10.3938/jkps.74.164

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