Journal article

Broadband Terahertz Circular-Polarization Beam Splitter

WSL Lee, S Nirantar, D Headland, M Bhaskaran, S Sriram, C Fumeaux, W Withayachumnankul

Advanced Optical Materials | Published : 2018

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..

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