Oscillatory penetration of near-fields in plasmonic excitation at metal-dielectric interfaces

S. C. Lee; J. H. Kang; Q. H. Park; S. Krishna; S. R.J. Brueck

doi:10.1038/srep24400

Oscillatory penetration of near-fields in plasmonic excitation at metal-dielectric interfaces

S. C. Lee, J. H. Kang, Q. H. Park, S. Krishna, S. R.J. Brueck

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

9 Citations (Scopus)

Abstract

The electric field immediately below an illuminated metal-film that is perforated with a hole array on a dielectric consists of direct transmission and scattering of the incident light through the holes and evanescent near-field from plasmonic excitations. Depending on the size and shape of the hole apertures, it exhibits an oscillatory decay in the propagation direction. This unusual field penetration is explained by the interference between these contributions, and is experimentally confirmed through an aperture which is engineered with four arms stretched out from a simple circle to manipulate a specific plasmonic excitation available in the metal film. A numerical simulation quantitatively supports the experiment. This fundamental characteristic will impact plasmonics with the near-fields designed by aperture engineering for practical applications.

Original language	English
Article number	24400
Journal	Scientific reports
Volume	6
DOIs	https://doi.org/10.1038/srep24400
Publication status	Published - 2016 Apr 19

Bibliographical note

Funding Information:
This work was partially supported by the Air Force Office of Scientific Research. QP was supported by the Center for Advanced Meta-Materials(CAMM) funded by the Ministry of Science, ICT and Future Planning as Global Frontier Project (CAMM-2014M3A6B3063710).

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abstract = "The electric field immediately below an illuminated metal-film that is perforated with a hole array on a dielectric consists of direct transmission and scattering of the incident light through the holes and evanescent near-field from plasmonic excitations. Depending on the size and shape of the hole apertures, it exhibits an oscillatory decay in the propagation direction. This unusual field penetration is explained by the interference between these contributions, and is experimentally confirmed through an aperture which is engineered with four arms stretched out from a simple circle to manipulate a specific plasmonic excitation available in the metal film. A numerical simulation quantitatively supports the experiment. This fundamental characteristic will impact plasmonics with the near-fields designed by aperture engineering for practical applications.",

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AU - Brueck, S. R.J.

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Oscillatory penetration of near-fields in plasmonic excitation at metal-dielectric interfaces

Abstract

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