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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 13 — Jun. 21, 2010
  • pp: 14056–14062

High transmission and low color cross-talk plasmonic color filters using triangular-lattice hole arrays in aluminum films

Qin Chen and David R. S. Cumming  »View Author Affiliations

Optics Express, Vol. 18, Issue 13, pp. 14056-14062 (2010)

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Three primary color (red, green and blue) filters consisting of subwavelength triangular-lattice hole arrays in an aluminum film on glass were simulated and fabricated. A silicon dioxide cap layer, deposited on the patterned aluminum film, was found to almost double the transmission efficiency for all the filters. The measured peak transmittance for each color filter was above 30%, exhibiting a wavelength spectrum with a full-width at half-maximum of approximately 100 nm. Simulation results of various structures with different cap layers revealed the enhanced coupling between surface plasmon resonances at both sides of the metal film in a symmetrical configuration. It was found that gratings with as few as three periods were sufficient to demonstrate filtering. The effect of metal thickness and hole size was investigated in detail.

© 2010 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(050.6624) Diffraction and gratings : Subwavelength structures
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Diffraction and Gratings

Original Manuscript: April 12, 2010
Revised Manuscript: May 20, 2010
Manuscript Accepted: May 21, 2010
Published: June 15, 2010

Qin Chen and David R. S. Cumming, "High transmission and low color cross-talk plasmonic color filters using triangular-lattice hole arrays in aluminum films," Opt. Express 18, 14056-14062 (2010)

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