Effect of shape, size, and periodicity variations on extraordinary thransmission through symmetric hole arrays in a 4 pair metallo-dielectric tuned metamaterial

Emily A. Ray; Rene Lopez

doi:10.1117/12.894291

20 September 2011 Effect of shape, size, and periodicity variations on extraordinary thransmission through symmetric hole arrays in a 4 pair metallo-dielectric tuned metamaterial

Emily A. Ray, Rene Lopez

Author Affiliations +

Proceedings Volume 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX; 80963L (2011) https://doi.org/10.1117/12.894291
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

We show the effects of hole shape, size, and periodicity variation on extraordinary transmission through a tuned metamaterial of 4 pairs of alternating layers of Ag-Al₂O₃ with 20 nm thicknesses under illumination of TM light. The advantage of a metamaterial over a Ag film of similar thickness is the tunability of the surface plasmons coupling k-vector. Because their cross sections appear the same in fourier space, incident TM light sees the same structure for circular, square, and rectangular holes transmission is unaffected by these shape variations. Further, as we increase the hole size, the transmission does not exhibit the expected enhancement as both the 250 nm and 150 nm diameter holes are both too small to have their maxima overlap with the tuned transmission enhancement of the metamaterial. For the metamaterial, we are able to tune it to support surface plasmons from periodicities ranging from 130 nm to 215 nm, which effectively shifts the transmission peaks from the blue end of the spectrum in Ag films across the visible and into the red.

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Emily A. Ray and Rene Lopez "Effect of shape, size, and periodicity variations on extraordinary thransmission through symmetric hole arrays in a 4 pair metallo-dielectric tuned metamaterial", Proc. SPIE 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX, 80963L (20 September 2011); https://doi.org/10.1117/12.894291

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KEYWORDS

Metamaterials

Surface plasmons

Silver

Metals

Dielectrics

Fourier transforms

Wave propagation

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