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Type: Journal article
Title: Broadband terahertz circular-polarization beam splitter
Author: Lee, W.
Nirantar, S.
Headland, D.
Bhaskaran, M.
Sriram, S.
Fumeaux, C.
Withayachumnankul, W.
Citation: Advanced Optical Materials, 2018; 6(3):1700852-1-1700852-7
Publisher: John Wiley & Sons
Issue Date: 2018
ISSN: 2195-1071
Statement of
Wendy S. L. Lee, Shruti Nirantar, Daniel Headland, Madhu Bhaskaran, Sharath Sriram, Christophe Fumeaux, and Withawat Withayachumnankul
Abstract: Splitting circularly polarized waves is desirable for high-data-rate wireless communications and study of molecular chirality at terahertz frequencies. Typically, this functionality is achieved using bulk optical systems with limitations in material availability, bandwidth, and efficiency. As an alternative, metasurfaces with spatially varying broadband birefringence are employed to attain the same functionality. It is demonstrated that a metasurface designed with gradually rotated birefringent resonators can deflect normally incident left-handed circularly polarized and right-handed circularly polarized waves into different directions. This beam splitting functionality is maintained over an experimentally demonstrated relative deflection bandwidth of 53%, namely, covering the band of 0.58–1.00 THz.
Keywords: Beam-splitter; circular polarization; metasurface; terahertz
Description: Published online: December 22, 2017
Rights: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI: 10.1002/adom.201700852
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Electrical and Electronic Engineering publications

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