Optical slot antenna and its application

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


We present an optical slot antenna and its application. By measuring transmission spectra and far-field radiation pattern of metallic slots with nanometer scale, we show that a metallic nanoslot has the properties of an antenna, which are resonance, polarization, and bidirectional far-field radiation pattern, and can be regarded as a magnetic dipole in optical region. Additionally, we also make the unidirectional radiation by adapting the geometry of RF Yagi-Uda antenna and applying slot antenna. By the aid of phase analysis based on 3-dimensional finite-difference time-domain simulation, we can increase the front-to-back ratio of an optical slot Yagi-Uda antenna up to about 5. As the application of a slot antenna, we integrate a metal-insulator-metal plasmonic waveguide with a slot antenna. A surface plasmon waveguide mode propagating in MIM structure is well-coupled to a slot antenna and radiates into free-space in form of dipole radiation. By adding an auxiliary structure that has the role of reflector as like a slot Yagi-Uda antenna, the direction of radiation from a slot antenna integrated with a plasmonic waveguide can be controlled efficiently. Besides the possibility of integration with a waveguide, we expect that a slot antenna can be applied to active devices such as light emitting diodes or lasers for the future.

Original languageEnglish
Title of host publicationUltrafast Phenomena and Nanophotonics XXI
ISBN (Electronic)9781510606456
Publication statusPublished - 2017
EventUltrafast Phenomena and Nanophotonics XXI 2017 - San Francisco, United States
Duration: 2017 Jan 302017 Feb 2


OtherUltrafast Phenomena and Nanophotonics XXI 2017
Country/TerritoryUnited States
CitySan Francisco


  • Integration with a plasmonic waveguide
  • Magnetic dipole
  • Optical slot antenna
  • Optical slot Yagi-Uda antenna

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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