Controlling the near-field excitation of nano-antennas with phase-change materials

Tsung-Sheng Kao, Yi Guo Chen, Ming Hui Hong*

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Scopus citations


By utilizing the strongly induced plasmon coupling between discrete nano-antennas and quantitatively controlling the crystalline proportions of an underlying Ge2Sb2Te5 (GST) phase-change thin layer, we show that nanoscale light localizations in the immediate proximity of plasmonic nano-antennas can be spatially positioned. Isolated energy hot-spots at a subwavelength scale can be created and adjusted across the landscape of the plasmonic system at a step resolution of λ/20. These findings introduce a new approach for nano-circuitry, bio-assay addressing and imaging applications.

Original languageEnglish
Pages (from-to)632-637
Number of pages6
JournalBeilstein Journal of Nanotechnology
Issue number1
StatePublished - 5 Dec 2013


  • Light localization
  • Nano-antenna
  • Near field
  • Phase-change materials
  • Plasmon coupling

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