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  • Vol. 36, Iss. 15 — Aug. 1, 2011
  • pp: 2764–2766

Complementary bowtie aperture for localizing and enhancing optical magnetic field

Nan Zhou, Edward C. Kinzel, and Xianfan Xu  »View Author Affiliations


Optics Letters, Vol. 36, Issue 15, pp. 2764-2766 (2011)
http://dx.doi.org/10.1364/OL.36.002764


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Abstract

Nanoscale bowtie antenna and bowtie aperture antenna have been shown to generate strongly enhanced and localized electric fields below the diffraction limit in the optical frequency range. According to Babinet’s principle, their complements will be efficient for concentrating and enhancing magnetic fields. In this Letter, we discuss the enhancement of magnetic field intensity of nanoscale complementary bowtie aperture as well as complementary bowtie aperture antenna, or diabolo nanoantenna. We show that the complementary bowtie antenna resonates at a smaller wavelength and thus is more suitable for applications near visible wavelengths. The near-field magnetic intensity can be further enhanced by the addition of groove structures that scatter surface plasmon.

© 2011 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(240.0240) Optics at surfaces : Optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: May 11, 2011
Revised Manuscript: June 21, 2011
Manuscript Accepted: June 22, 2011
Published: July 19, 2011

Citation
Nan Zhou, Edward C. Kinzel, and Xianfan Xu, "Complementary bowtie aperture for localizing and enhancing optical magnetic field," Opt. Lett. 36, 2764-2766 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-15-2764


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