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Proceedings Paper

A terahertz-wave subwavelength polarization rotator based on metamaterials
Author(s): Yi-Ju Chiang; Ta-Jen Yen
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Paper Abstract

We experimentally demonstrate an ultrathin polarization rotator (PR) capable of rotating linearly polarized radiation 90 degrees in the terahertz-gap region by integrating the polarization conversion property from asymmetric split-ring resonators (ASRRs) and the polarization selectivity from S-shape resonators (SRs). This ultrathin-PR possesses a nearly complete polarization conversion up to 97.7% at 1.04 THz and a high conversion transmission coefficient of 0.48, enhanced by a constructive Febry-Perot interference between the ASRRs and the SRs. Furthermore, the overall thickness of the ultrathin PR is about 50 μm, only one-sixth of the incident wavelength, so that the associated optical devices can be miniaturized. The simple metal-dielectric-metal trilayered structure of the ultrathin-PR allows the tolerance of translational misalignment between the ASRRs and SRs and hence significantly facilitates the fabrication process.

Paper Details

Date Published: 15 October 2012
PDF: 6 pages
Proc. SPIE 8496, Terahertz Emitters, Receivers, and Applications III, 84960M (15 October 2012); doi: 10.1117/12.929406
Show Author Affiliations
Yi-Ju Chiang, National Tsing Hua Univ. (Taiwan)
Ta-Jen Yen, National Tsing Hua Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8496:
Terahertz Emitters, Receivers, and Applications III
Manijeh Razeghi; Alexei N. Baranov; Henry O. Everitt; John M. Zavada; Tariq Manzur, Editor(s)

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