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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 13 — Jun. 20, 2011
  • pp: 12325–12335

Arm-edge conditions in plasmonic folded dipole nanoantennas

Hideo Iizuka, Nader Engheta, Hisayoshi Fujikawa, and Kazuo Sato  »View Author Affiliations

Optics Express, Vol. 19, Issue 13, pp. 12325-12335 (2011)

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Silver folded dipoles consisting of two parallel nanowires may operate as efficient transmitting and receiving nanoantennas in the optical domain in both cases of silver-nanowire-terminated arm-edges and open-terminated arm-edges, in contrast to their conventional radio-frequency (RF) counterparts that only operate efficiently when they are short-wire-terminated arm-edges. The mode decomposition analysis with the equivalent circuit reveals that the difference of the wave numbers between the common and the differential modes allows this feature for the optical folded dipole nanoantenna under both arm-edge conditions. The analysis also estimates the efficiency of the folded dipoles via the equivalent radius of nanowires for the common mode. These folded nanostructures may exhibit the enhanced efficiency with the maintained radiation patterns, where the efficiency of folded dipoles is the same as that of the effective single dipole at resonance.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(350.5610) Other areas of optics : Radiation

ToC Category:
Optics at Surfaces

Original Manuscript: April 15, 2011
Revised Manuscript: May 17, 2011
Manuscript Accepted: May 31, 2011
Published: June 9, 2011

Hideo Iizuka, Nader Engheta, Hisayoshi Fujikawa, and Kazuo Sato, "Arm-edge conditions in plasmonic folded dipole nanoantennas," Opt. Express 19, 12325-12335 (2011)

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