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

Tsung-Sheng Kao; Yi Guo Chen; Ming Hui Hong

doi:10.3762/bjnano.4.70

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

Department of Photonics

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

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 language	English
Pages (from-to)	632-637
Number of pages	6
Journal	Beilstein Journal of Nanotechnology
Volume	4
Issue number	1
DOIs	https://doi.org/10.3762/bjnano.4.70
State	Published - 5 Dec 2013

Keywords

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

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abstract = "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.",

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AB - 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.

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KW - Near field

KW - Phase-change materials

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

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Keywords

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