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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 12 — Jun. 17, 2013
  • pp: 14090–14096

The aspect ratio effect on plasmonic properties and biosensing of bonding mode in gold elliptical nanoring arrays

Chia-Yang Tsai, Kai-Hao Chang, Che-Yao Wu, and Po-Tsung Lee  »View Author Affiliations

Optics Express, Vol. 21, Issue 12, pp. 14090-14096 (2013)

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We investigate both numerically and experimentally the optical properties and biosensing of gold elliptical nanoring (ENR) arrays with various aspect ratios. The gold ENR exhibits a strong localized surface plasmon bonding mode in near-infrared region, whose peak wavelength is red-shifted as increasing the aspect ratio under longitudinal and transverse polarizations. Furthermore, the disk- and hole-like optical properties for longitudinal and transverse modes are observed, which cause different behaviors in field intensity enhancement. For biomolecule sensing, we find that both modes show increased surface sensitivities when enlarging the aspect ratio of gold ENR.

© 2013 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Optics at Surfaces

Original Manuscript: March 29, 2013
Revised Manuscript: May 16, 2013
Manuscript Accepted: May 28, 2013
Published: June 5, 2013

Virtual Issues
Vol. 8, Iss. 7 Virtual Journal for Biomedical Optics

Chia-Yang Tsai, Kai-Hao Chang, Che-Yao Wu, and Po-Tsung Lee, "The aspect ratio effect on plasmonic properties and biosensing of bonding mode in gold elliptical nanoring arrays," Opt. Express 21, 14090-14096 (2013)

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