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Appl. Phys. Lett. 101, 241115 (2012); http://dx.doi.org/10.1063/1.4771992 (4 pages)

Mode splitting of surface plasmon resonance in super-period metal nanohole array gratings

Junpeng Guo and Haisheng Leong

Department of Electrical and Computer Engineering, University of Alabama in Huntsville, 301 Sparkman Dr., Huntsville, Alabama 35899, USA

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(Received 1 November 2012; accepted 29 November 2012; published online 12 December 2012)

We experimentally observed surface plasmon resonance mode splitting in a super-period metal nanohole array grating under the transverse magnetic polarization excitation. The mode splitting was observed in the zeroth order transmission and also in the first order transmission. However, the mode splitting phenomenon is more evident in the first order transmission than in the zeroth order transmission. It is explained that the mode splitting is due to the coupling between the surface plasmon resonance mode in the subwavelength period metal nanohole arrays and the resonance mode of the super-period metal grating.

© 2012 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 73.20.Mf

    Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

  • 02.70.Bf

    Finite-difference methods

  • 02.60.-x

    Numerical approximation and analysis

ARTICLE DATA

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

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    References

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