Plasmonic angular momentum on metal-dielectric nano-wedges in a sectorial indefinite metamaterial
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Fang_Plasmonic angular.pdf
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Checksum (MD5)
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Author(s)
Jin, Dafei
Fang, Nicholas Xuanlai
Date Issued
November 2013
Journal
Optics Express
Publisher
Optical Society of America
Citation
Jin, Dafei, and Nicholas X. Fang. “Plasmonic Angular Momentum on Metal-Dielectric Nano-Wedges in a Sectorial Indefinite Metamaterial.” Optics Express 21, no. 23 (2013): 28344.
Version
Original manuscript
Abstract
We present an analytical study in the structure-modulated plasmonic angular momentum, which is trapped in the core region of a sectorial indefinite metamaterial. This metamaterial consists of periodically arranged metal-dielectric nano-wedges along the azimuthal direction. Employing a transfer-matrix calculation and a conformal-mapping technique, our theory can deal with an arbitrary number of wedges with realistically rounded tips. We demonstrate that in the deep-subwavelength regime, strong electric fields that carry large azimuthal variations can exist only within ten-nanometer length scale around the structural center. They are naturally bounded by a characteristic radius on the order of a hundred nanometers from the center. These extreme confining properties suggest that the structure under investigation can be superior to the conventional metal-dielectric cavities in terms of nanoscale photonic manipulation.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1364/OE.21.028344
