Spatial filtering by using cascading plasmonic gratings

C.-M. Wang, Y.-C. Chang, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)


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 3o. The angular dispersion of the cascading plamonic gratings is about d?/d=0.15o/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.
Original languageEnglish
Pages (from-to)6218-6223
Number of pages6
JournalOptics Express
Issue number8
Publication statusPublished - 13 Apr 2009
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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