Applied Physics A

, Volume 100, Issue 2, pp 353–357 | Cite as

Field enhancement by semi-nanocapsule plasmonic antenna at the visible violet wavelength

  • Hong-Son Chu
  • Wei-Bin Ewe
  • Boris S. Luk’yanchuk
  • Er-Ping Li
Article

Abstract

We investigate, at the visible violet wavelength of 400 nm, the localized field-enhancement properties of an optical antenna consisting of two coupled metallic nanoparticles placed on the silica substrate. Compared to other shapes of optical antennas such as bowtie and coupled elliptical rods, the coupled semi-nanocapsules exhibit a stronger field-intensity enhancement in the gap and relatively weak field intensity at the outer-ends. Furthermore, the intensity enhancement of the semi-nanocapsules antenna can be further enhanced by choosing the suitable direction of illumination. These proposed structures can be used for the design and the applications of an optical antenna at the visible violet wavelength.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Hong-Son Chu
    • 1
  • Wei-Bin Ewe
    • 1
  • Boris S. Luk’yanchuk
    • 2
  • Er-Ping Li
    • 1
  1. 1.Advanced Photonics and PlasmonicsA*STAR-Institute of High Performance ComputingSingaporeSingapore
  2. 2.A*STAR-Data Storage InstituteSingaporeSingapore

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