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|Title:||Broadband terahertz circular-polarization beam splitter|
|Citation:||Advanced Optical Materials, 2018; 6(3):1700852-1-1700852-7|
|Publisher:||John Wiley & Sons|
|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|
|Appears in Collections:||Electrical and Electronic Engineering publications|
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