Optical slot antennas and their applications to photonic devices

Yeonsang Park, Jineun Kim, Young Geun Roh, Q Han Park

Research output: Contribution to journalReview article

Abstract

We present optical slot antennas and their applications to photonic devices. We show that metallic nanoslots have the properties of a slot antenna by measuring the transmission spectra and far-field radiation patterns and then prove that they can be physically regarded as magnetic dipoles in the optical region. Additionally, we can generate directional radiations from optical slot antennas by adopting the geometry of radiofrequency Yagi-Uda antenna and properly adding auxiliary elements called reflectors and directors to a single slot antenna. We present two cases as the applications of optical slot antennas. One is the integration of slot antennas to plasmonic waveguides. This combination can be used as a basic unit for optical interconnection to free space and plasmonic via in multilayered plasmonic structures. The other is the integration of slot antennas to the electrode of light-emitting diodes (LEDs). Using slot antennas, we can control the polarization and direction of emissions from LEDs. Besides the above-mentioned two cases, we expect that optical slot antennas have possible applications to various photonic devices and can be essential elements in future integrated photonic circuits with nanometer scales.

Original languageEnglish
Pages (from-to)1617-1636
Number of pages20
JournalNanophotonics
Volume7
Issue number10
DOIs
Publication statusPublished - 2018 Jan 1

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Keywords

  • integration to photonic devices
  • magnetic dipole
  • metallic nanoslot
  • optical slot antenna
  • optical slot Yagi-Uda antenna

ASJC Scopus subject areas

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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