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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 8 — Apr. 13, 2009
  • pp: 6218–6223

Spatial filtering by using cascading plasmonic gratings

Chih-Ming Wang, Yia-Chung Chang, and Din Ping Tsai  »View Author Affiliations

Optics Express, Vol. 17, Issue 8, pp. 6218-6223 (2009)

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In this study, the optical properties of a plasmonic multilayer structure, consisting of tw6o longitudinally cascaded gratings with a half pitch off-set, are investigated. The proposed structure, which is a system mixing extended and localized surface plasmon, forms transversely cascaded metal/insulator/metal cavities. The angle dependent reflection spectrum of the proposed structure displays a resonance peak at a specific angle. The full-width at half maximum (FWHM) of the resonant peak is smaller than 3°. The angular dispersion of the cascading plamonic gratings is about dθ/dλ, =0.15 °/nm. The cascading plasmonic gratings can be used as a spatial filter to improve the spatial coherence of a light source.

© 2009 Optical Society of America

OCIS Codes
(250.5403) Optoelectronics : Plasmonics

ToC Category:

Original Manuscript: February 20, 2009
Revised Manuscript: March 30, 2009
Manuscript Accepted: March 31, 2009
Published: April 1, 2009

Chih-Ming Wang, Yia-Chung Chang, and Din Ping Tsai, "Spatial filtering by using cascading plasmonic gratings," Opt. Express 17, 6218-6223 (2009)

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