High resolution color imaging by dielectric optical antennas

DOI Web Site
  • TAKAHARA Junichi
    Graduate School of Engineering, Osaka University Photonics Center, School of Engineering, Osaka University
  • NAGASAKI Yusuke
    Graduate School of Engineering, Osaka University
  • HOTTA Ikuto
    Graduate School of Engineering, Osaka University

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Other Title
  • 誘電体光アンテナによる高解像度カラー画像
  • ユウデンタイ ヒカリ アンテナ ニ ヨル コウカイゾウド カラー ガゾウ

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Abstract

<p>Plasmonic color can realize extremely high spatial resolution comparable to the diffraction limit of light unlike photonic crystal-based structural colors. However, it is difficult to improve the color purity due to the light absorption of metals. Here we focus on silicon, which is a dielectric with a high refractive index, and describe a color pixel with low loss, high color purity and high resolution by using a Mie resonator as a dielectric optical antenna. We also report on further improving the resolution by adding a chromium mask on the resonator. Such structural color pixels can have a resolution close to the diffraction limit. This is expected to be applied to anti-counterfeiting technology such as industrial products or displays etc.</p>

Journal

  • Oyo Buturi

    Oyo Buturi 88 (4), 276-280, 2019-04-10

    The Japan Society of Applied Physics

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