Local field enhancement of asymmetric metallic nanocylinder pairs

Ming Yaw Ng, Wei-Chih Liu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The local field enhancement and surface plasmon resonance of metallic nanoparticles were used to focus and to manipulate light in nanoscale. We investigated the local field enhancement of asymmetric silver nanocylinder pairs by using finite-difference time-domain simulation. The intensity of local field enhancement depends on separation distance, radius ratio, and incident angle of light. Local field enhancement around the smaller nanocylinder was higher and more confined than that of symmetric pairs due to the asymmetric polarization charge distribution on the surface of metallic nanocylinder pairs. Polarization charge distribution of nanocylinder pairs was induced by incident wave and mutual interaction of nanocylinder pairs and the far-field signal showed that the charge distribution was similar to dipole-like charge distribution.

Original languageEnglish
JournalJournal of the Korean Physical Society
Volume47
Issue numberSUPPL. 1
Publication statusPublished - 2005 Aug 1

Fingerprint

charge distribution
augmentation
wave interaction
polarization
surface plasmon resonance
far fields
silver
dipoles
nanoparticles
radii
simulation
interactions

Keywords

  • Finite-difference time-domain method
  • Metallic nanocylinders
  • Metallic nanoparticles
  • Plasmon resonance
  • Surface plasmon

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Local field enhancement of asymmetric metallic nanocylinder pairs. / Ng, Ming Yaw; Liu, Wei-Chih.

In: Journal of the Korean Physical Society, Vol. 47, No. SUPPL. 1, 01.08.2005.

Research output: Contribution to journalArticle

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AB - The local field enhancement and surface plasmon resonance of metallic nanoparticles were used to focus and to manipulate light in nanoscale. We investigated the local field enhancement of asymmetric silver nanocylinder pairs by using finite-difference time-domain simulation. The intensity of local field enhancement depends on separation distance, radius ratio, and incident angle of light. Local field enhancement around the smaller nanocylinder was higher and more confined than that of symmetric pairs due to the asymmetric polarization charge distribution on the surface of metallic nanocylinder pairs. Polarization charge distribution of nanocylinder pairs was induced by incident wave and mutual interaction of nanocylinder pairs and the far-field signal showed that the charge distribution was similar to dipole-like charge distribution.

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