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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 6, Iss. 10 — Oct. 1, 2008
  • pp: 791–793

Transmission enhancement properties of double-layered metallic hole arrays

Gongli Xiao, Xiang Yao, Xinming Ji, Jia Zhou, Zongming Bao, and Yiping Huang  »View Author Affiliations


Chinese Optics Letters, Vol. 6, Issue 10, pp. 791-793 (2008)


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Abstract

We report experimental results on enhanced light transmission through double-layered (Ag/Au) metallic hole arrays within a skin-depth. Zero-order transmission spectrums are characterized as a function of Ag film's thickness, which extends from \delta/15, \delta/6 to approximately \delta, where \delta is a skin-depth. In contrast with other reported results (Refs.[11-13]) in single-layered metallic hole arrays, our experimental results show much more dramatic properties of transmission process dependent on sub- thickness. It is shown that there is no negligible transmission enhancement at \delta/16. At \delta/6, much higher transmission efficiency can be achieved. With film's thickness being close to \delta, the transmission efficiency declines contrarily. Simultaneously, the corresponding resonant peak also slightly moves toward the shorter wavelength. It is proposed that the coupling of surface plasmon polaritons (SPPs) at Ag/Au interface within is involved in the process.

© 2008 Chinese Optics Letters

OCIS Codes
(160.0160) Materials : Materials
(240.0240) Optics at surfaces : Optics at surfaces
(260.0260) Physical optics : Physical optics
(310.0310) Thin films : Thin films

Citation
Gongli Xiao, Xiang Yao, Xinming Ji, Jia Zhou, Zongming Bao, and Yiping Huang, "Transmission enhancement properties of double-layered metallic hole arrays," Chin. Opt. Lett. 6, 791-793 (2008)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-6-10-791

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