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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 5 — Feb. 28, 2011
  • pp: 4217–4222

Tunable phase resonances in a compound metallic grating with perpendicular bumps and cuts

Zhimin Liu, Hongjian Li, Suxia Xie, Haiqing Xu, Shaoli Fu, Xin Zhou, and Caini Wu  »View Author Affiliations

Optics Express, Vol. 19, Issue 5, pp. 4217-4222 (2011)

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We propose a compound metallic grating with perpendicular bumps in each slit and investigate its transmission property theoretically. As the bumps are set symmetrically in the slits, the waveguide resonant peaks for the even (odd) modes exhibit a red-shift (blue-shift) compared with the resonant peaks of grating composed of bare slit. As the bumps are set asymmetrically, we show that the dips in transmission spectrum can be tuned by shifting the position and changing the size of bumps in the slit. The corresponding physical mechanisms for above phenomenon are discussed, followed by some qualitative explanations in terms of field distribution. We also investigate the optical transmission through a compound metallic grating with perpendicular bumps in one slit and cuts in another slit, and find that the dips in transmission spectrum are more sensitive to the simultaneous change of the bumps and cuts.

© 2011 OSA

OCIS Codes
(120.7000) Instrumentation, measurement, and metrology : Transmission
(240.6680) Optics at surfaces : Surface plasmons
(260.5740) Physical optics : Resonance

ToC Category:
Diffraction and Gratings

Original Manuscript: December 1, 2010
Revised Manuscript: January 13, 2011
Manuscript Accepted: January 31, 2011
Published: February 17, 2011

Zhimin Liu, Hongjian Li, Suxia Xie, Haiqing Xu, Shaoli Fu, Xin Zhou, and Caini Wu, "Tunable phase resonances in a compound metallic grating with perpendicular bumps and cuts," Opt. Express 19, 4217-4222 (2011)

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