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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 7 — Apr. 7, 2014
  • pp: 7434–7445

Slant-gap plasmonic nanoantennas for optical chirality engineering and circular dichroism enhancement

Daniel Lin and Jer-Shing Huang  »View Author Affiliations

Optics Express, Vol. 22, Issue 7, pp. 7434-7445 (2014)

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We present a new design of plasmonic nanoantenna with slant gap for optical chirality engineering. At resonance, the slant gap provides highly enhanced electric field parallel to external magnetic field with a phase delay of π/2, resulting in enhanced optical chirality. We show by numerical simulations that upon linearly polarized excitation our nanoantenna can generate near field with enhanced optical chirality which can be tuned by the slant angle and resonance condition. Our design allows chiral analysis with linearly polarized light and may find applications in circular dichroism analysis of chiral matter at surface.

© 2014 Optical Society of America

OCIS Codes
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(240.6680) Optics at surfaces : Surface plasmons
(260.6970) Physical optics : Total internal reflection
(250.5403) Optoelectronics : Plasmonics
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:

Original Manuscript: January 13, 2014
Revised Manuscript: March 13, 2014
Manuscript Accepted: March 13, 2014
Published: March 24, 2014

Daniel Lin and Jer-Shing Huang, "Slant-gap plasmonic nanoantennas for optical chirality engineering and circular dichroism enhancement," Opt. Express 22, 7434-7445 (2014)

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