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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 33 — Nov. 20, 2008
  • pp: 6285–6290

Omnidirectional narrow bandpass filter based on metal-dielectric thin films

Jin-long Zhang, Wei-dong Shen, Peifu Gu, Yue-guang Zhang, Hai-tao Jiang, and Xu Liu  »View Author Affiliations

Applied Optics, Vol. 47, Issue 33, pp. 6285-6290 (2008)

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We show that a metal-dielectric Fabry–Perot (FP) structure can exhibit an omnidirectional transmission for p-polarized light, which means a passband is independent of the incidence angle of light. The omnidirectional passband occurs when the sum of the reflection phase shift at the metal–spacer interface and the propagation shift in the spacer region is almost 2 π for every incidence angle. We numerically and experimentally demonstrate such an omnidirectional narrow bandpass filter in an air/Ag/ZnS/Ag/glass structure. Moreover, we introduce an antireflection coating on both sides of the metal-dielectric FP structure. The transmittance will increase obviously, while the omnidirectional property remains the same.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(310.3915) Thin films : Metallic, opaque, and absorbing coatings
(310.6845) Thin films : Thin film devices and applications

ToC Category:
Thin Films

Original Manuscript: September 8, 2008
Revised Manuscript: October 14, 2008
Manuscript Accepted: October 16, 2008
Published: November 20, 2008

Jin-long Zhang, Wei-dong Shen, Peifu Gu, Yue-guang Zhang, Hai-tao Jiang, and Xu Liu, "Omnidirectional narrow bandpass filter based on metal-dielectric thin films," Appl. Opt. 47, 6285-6290 (2008)

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