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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 7 — Jul. 1, 2011
  • pp: 1655–1660

Magnetic plasmon in coupled nanosandwich structure

Liu Qiu, Shuming Wang, Hui Liu, Tao Li, Shining Zhu, and Xiang Zhang  »View Author Affiliations


JOSA B, Vol. 28, Issue 7, pp. 1655-1660 (2011)
http://dx.doi.org/10.1364/JOSAB.28.001655


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Abstract

We investigate the magnetic resonant modes in the coupled nanosandwich (CSW) structure, which can be considered a metamolecule composed of two meta-atoms (nanosandwiches). The coupling between two nanosandwiches leads to two magnetic resonant modes, the split of the single magnetic resonant mode. Moreover, the coupling effect in a more complicated system that consists of two closely placed CSWs is studied, where four magnetic resonant modes with different phase relationships between meta-atoms are observed. It is shown that the interaction between CSWs leads to this secondary split of the magnetic resonant mode. We further consider a one-dimensional metacrystal formed by a chain of CSWs, and directly observe the magnetic plasmon (MP) bands through the Fourier transformation approach. Modifying both the thickness of the middle metal layer of CSWs and the spacing between CSWs, one can efficiently engineer the MP band, and even open a bandgap. Such a CSW chain can even work as a subwavelength waveguide, which may have potential applications in nano-optics and photonics.

© 2011 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(160.3918) Materials : Metamaterials

ToC Category:
Materials

History
Original Manuscript: November 29, 2010
Revised Manuscript: May 8, 2011
Manuscript Accepted: May 9, 2011
Published: June 9, 2011

Citation
Liu Qiu, Shuming Wang, Hui Liu, Tao Li, Shining Zhu, and Xiang Zhang, "Magnetic plasmon in coupled nanosandwich structure," J. Opt. Soc. Am. B 28, 1655-1660 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-7-1655

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