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https://hdl.handle.net/2440/84678
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Type: | Journal article |
Title: | Terahertz reflectarray as a polarizing beam splitter |
Author: | Niu, T. Withayachumnankul, W. Upadhyay, A. Gutruf, P. Abbott, D. Bhaskaran, M. Sriram, S. Fumeaux, C. |
Citation: | Optics Express, 2014; 22(13):16148-16160 |
Publisher: | Optical Society of America |
Issue Date: | 2014 |
ISSN: | 1094-4087 1094-4087 |
Statement of Responsibility: | Tiaoming Niu, Withawat Withayachumnankul, Aditi Upadhyay, Philipp Gutruf, Derek Abbott, Madhu Bhaskaran, Sharath Sriram and Christophe Fumeaux |
Abstract: | A reflectarray is designed and demonstrated experimentally for polarization-dependent beam splitting at 1 THz. This reflective component is composed of two sets of orthogonal strip dipoles arranged into interlaced triangular lattices over a ground plane. By varying the length and width of the dipoles a polarization-dependent localized phase change is achieved on reflection, allowing periodic subarrays with a desired progressive phase distribution. Both the simulated field distributions and the measurement results from a fabricated sample verify the validity of the proposed concept. The designed terahertz reflectarray can efficiently separate the two polarization components of a normally incident wave towards different predesigned directions of ±30°. Furthermore, the measured radiation patterns show excellent polarization purity, with a cross-polarization level below −27 dB. The designed reflectarray could be applied as a polarizing beam splitter for polarization-sensitive terahertz imaging or for emerging terahertz communications. |
Rights: | © 2014 Optical Society of America |
DOI: | 10.1364/OE.22.016148 |
Grant ID: | http://purl.org/au-research/grants/arc/DP1092717 http://purl.org/au-research/grants/arc/DP110100262 http://purl.org/au-research/grants/arc/FT120100351 http://purl.org/au-research/grants/arc/FT100100585 |
Published version: | http://dx.doi.org/10.1364/oe.22.016148 |
Appears in Collections: | Aurora harvest 2 Electrical and Electronic Engineering publications |
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