Scattering properties of vein induced localized surface plasmon resonances on a gold disk

Muhammad Amin, Hakan Bagci

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

It is demonstrated via simulations that a gold nano-disk with a non-concentric cavity supports localized surface plasmon resonances over a frequency band that includes the visible and the near-infrared parts of the spectrum. The charge distribution on the disk indicates that the two distinct peaks in the scattering cross section are due to the (hybridized) higher-order plasmon modes; plasmon hybridization that involves the dipole modes of the disk and the cavity enforces the "coupling" of the plane-wave excitation to the originally-dark higher-order modes. It is further demonstrated that the resonance frequencies can be tuned by varying the radius of the embedded non-concentric cavity. The near-field enhancement observed at these two tunable resonance frequencies suggests that the proposed structure can be used as a substrate in surface enhanced spectroscopy applications. © 2011 IEEE.
Original languageEnglish (US)
Title of host publication8th International Conference on High-capacity Optical Networks and Emerging Technologies
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages237-240
Number of pages4
ISBN (Print)9781457711695
DOIs
StatePublished - Dec 2011

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