Photonics Research, Volume. 6, Issue 11, 1056(2018)
Broadband terahertz rotator with an all-dielectric metasurface
Fig. 1. (a) Conceptual description of the metasurface based on two identical dielectric antennas to manipulate the polarization of the terahertz wave.
Fig. 2. (a)–(c) Optical images of the ultrabroadband dielectric metasurface rotators S1, S2, and S3. The red arrows denote the optical axis of rotators. (d)–(f) Simulated electric field distributions of the output
Fig. 3. (a)–(c) Measured cross-polarized transmission spectra of the three rotators S1–S3 versus the deflection angle. White dashed lines represent the theoretically calculated deflection angles. (d)–(f) Corresponding measured transmission spectra of the copolarized component.
Fig. 4. (a) Quality analysis of the output polarization state of rotator S3 with the copolarized incidence. The navy line is obtained from theoretical calculation, and measured values are represented by the red circle dots. (b) Measured cross-polarization efficiencies of S1, S2, and S3.
Fig. 5. (a) Measured transmission spectra of S3 under the circular polarization incidence. (b),(c) Measured cross-polarized and copolarized transmission spectra of sample S4 versus the deflection angle, respectively. (d),(e) Corresponding measured transmission spectra of S5. Insets are the optical image of rotators S4 and S5, and the red arrows denote the optical axis of the rotators.
Get Citation
Copy Citation Text
Quanlong Yang, Xieyu Chen, Quan Xu, Chunxiu Tian, Yuehong Xu, Longqing Cong, Xueqian Zhang, Yanfeng Li, Caihong Zhang, Xixiang Zhang, Jiaguang Han, Weili Zhang, "Broadband terahertz rotator with an all-dielectric metasurface," Photonics Res. 6, 1056 (2018)
Category: Integrated Optics
Received: May. 24, 2018
Accepted: Sep. 14, 2018
Published Online: Nov. 11, 2018
The Author Email: Jiaguang Han (jiaghan@tju.edu.cn)