Dielectric

Chemistry

Materials science

Optoelectronics

Physics

Polarization mode dispersion

Terahertz radiation

Optics

Physical chemistry

Optical fiber

Polarization (electrochemistry)

Photonics

Metamaterial

Broadband

Photonics Research

Polarization manipulation is essential in developing cutting-edge photonic devices ranging from optical communication displays to solar energy harvesting.Most previous works for efficient polarization control cannot avoid utilizing metallic components that inevitably suffer from large ohmic loss and thus low operational efficiency.Replacing metallic components with Mie resonance-based dielectric resonators will largely suppress the ohmic loss toward high-efficiency metamaterial devices.Here, we propose an efficient approach for broadband, highquality polarization rotation operating in transmission mode with all-dielectric metamaterials in the terahertz regime.By separating the orthogonal polarization components in space, we obtain rotated output waves with a conversion efficiency of 67.5%.The proposed polarization manipulation strategy shows impressive robustness and flexibility in designing metadevices of both linear-and circular-polarization incidences.

Broadband terahertz rotator with an all-dielectric metasurface