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

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...

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Bibliographic Details
Published in:Beilstein journal of nanotechnology 2013-10, Vol.4 (1), p.632-637
Main Authors: Kao, Tsung Sheng, Chen, Yi Guo, Hong, Ming Hui
Format: Article
Language:English
Subjects:
Full Research Paper
light localization
nano-antenna
Nanoscience
Nanotechnology
near field
phase-change materials
plasmon coupling
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Summary: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.
ISSN:2190-4286
2190-4286
DOI:10.3762/bjnano.4.70