Broadband terahertz circular-polarization beam splitter

Lee, W, Nirantar, S, Headland, D, Bhaskaran, M, Sriram, S, Fumeaux, C and Withayachumnakul, W 2018, 'Broadband terahertz circular-polarization beam splitter', Advanced Optical Materials, vol. 6, no. 3, pp. 1-7.

Document type: Journal Article
Collection: Journal Articles

Title Broadband terahertz circular-polarization beam splitter
Author(s) Lee, W
Nirantar, S
Headland, D
Bhaskaran, M
Sriram, S
Fumeaux, C
Withayachumnakul, W
Year 2018
Journal name Advanced Optical Materials
Volume number 6
Issue number 3
Start page 1
End page 7
Total pages 7
Publisher Wiley-VCH Verlag
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.
Keyword(s) beam-splitter
circular polarization
DOI - identifier 10.1002/adom.201700852
ISSN 2195-1071
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