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Title: Broadband terahertz rotator with an all-dielectric metasurface
Authors: Yang, Quanlong
Chen, Xieyu
Xu, Quan
Tian, Chunxiu
Xu, Yuehong
Cong, Longqing
Zhang, Xueqian
Li, Yanfeng
Zhang, Caihong
Zhang, Xixiang
Han, Jiaguang
Zhang, Weili
Keywords: Science::Physics
Issue Date: 2018
Source: Yang, Q., Chen, X., Xu, Q., Tian, C., Xu, Y., Cong, L., . . . Zhang, W. (2018). Broadband terahertz rotator with an all-dielectric metasurface. Photonics Research, 6(11), 1056-1061. doi:10.1364/PRJ.6.001056
Journal: Photonics Research
Abstract: 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, high-quality 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.
ISSN: 2327-9125
DOI: 10.1364/PRJ.6.001056
Rights: © 2018 Chinese Laser Press (Published by OSA Publishing). All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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