Resonant Excitation of Terahertz Surface Plasmons in Subwavelength Metal Holes

Zhang, Weili; Azad, Abul K.; Han, Jiaguang

doi:https://doi.org/10.1155/2007/40249

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Meta Materials, Plasmonics, and THz Frequency Photonic Components

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Review Article | Open Access

Volume 2007 | Article ID 040249 | https://doi.org/10.1155/2007/40249

Resonant Excitation of Terahertz Surface Plasmons in Subwavelength Metal Holes

Weili Zhang,¹Abul K. Azad,^1,2and Jiaguang Han^1,3

Academic Editor: Yalin Lu

Received27 Sept 2007

Accepted12 Oct 2007

Published16 Dec 2007

Abstract

We present a review of experimental studies of resonant excitation of terahertz surface plasmons in two-dimensional arrays of subwavelength metal holes. Resonant transmission efficiency higher than unity was recently achieved when normalized to the area occupied by the holes. The effects of hole shape, hole dimensions, dielectric function of metals, polarization dependence, and array film thickness on resonant terahertz transmission in metal arrays were investigated by the state-of-the-art terahertz time-domain spectroscopy. In particular, extraordinary terahertz transmission was demonstrated in arrays of subwavelength holes made even from Pb, a generally poor metal, and having thickness of only one-third of skin depth. Terahertz surface plasmons have potential applications in terahertz imaging, biosensing, interconnects, and development of integrated plasmonic components for terahertz generation and detection.

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Copyright

Copyright © 2007 Weili Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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