Controlling surface plasmon excitation of pair arrays of metallic nanocylinders

M. Y. Ng; W. C. Liu

doi:10.1007/s00339-007-4123-5

Controlling surface plasmon excitation of pair arrays of metallic nanocylinders

M. Y. Ng, W. C. Liu^*

^*Corresponding author for this work

Department of Physics

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

9 Citations (Scopus)

Abstract

Surface plasmon excitation of pair arrays of silver nanocylinders is studied using finite-difference time-domain simulations. Strong local fields are generated around the nanocylinders due to excitation of localized surface plasmon and electromagnetic fields are confined effectively in the gaps between the nanocylinders. Surface plasmon resonance and local-field enhancement of two-pair arrays can be controlled by changing the illumination direction of the incident light due to induced asymmetric polarization charges. Complex resonant modes could be excited with increasing number of silver nanocylinder pairs. Selective local-field enhancement is observed in the gaps of the pairs by changing the interpair distance of four-pair arrays.

Original language	English
Pages (from-to)	391-395
Number of pages	5
Journal	Applied Physics A: Materials Science and Processing
Volume	89
Issue number	2
DOIs	https://doi.org/10.1007/s00339-007-4123-5
Publication status	Published - 2007 Nov

ASJC Scopus subject areas

General Chemistry
General Materials Science

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10.1007/s00339-007-4123-5

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abstract = "Surface plasmon excitation of pair arrays of silver nanocylinders is studied using finite-difference time-domain simulations. Strong local fields are generated around the nanocylinders due to excitation of localized surface plasmon and electromagnetic fields are confined effectively in the gaps between the nanocylinders. Surface plasmon resonance and local-field enhancement of two-pair arrays can be controlled by changing the illumination direction of the incident light due to induced asymmetric polarization charges. Complex resonant modes could be excited with increasing number of silver nanocylinder pairs. Selective local-field enhancement is observed in the gaps of the pairs by changing the interpair distance of four-pair arrays.",

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AB - Surface plasmon excitation of pair arrays of silver nanocylinders is studied using finite-difference time-domain simulations. Strong local fields are generated around the nanocylinders due to excitation of localized surface plasmon and electromagnetic fields are confined effectively in the gaps between the nanocylinders. Surface plasmon resonance and local-field enhancement of two-pair arrays can be controlled by changing the illumination direction of the incident light due to induced asymmetric polarization charges. Complex resonant modes could be excited with increasing number of silver nanocylinder pairs. Selective local-field enhancement is observed in the gaps of the pairs by changing the interpair distance of four-pair arrays.

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Controlling surface plasmon excitation of pair arrays of metallic nanocylinders

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