Complementary transmissive ultra-thin meta-deflectors for broadband polarization-independent refractions in the microwave region
Polarization manipulation is a significant issue for artificial modulation of the electromagnetic (EM) wave, but general mechanisms all suffer the restriction of inherent symmetric properties between opposite handedness. Herein, a strategy to independently and arbitrarily manipulate the EM wave with orthogonal circular polarizations based on a metasurface is proposed, which effectually breaks through traditional symmetrical characteristics between orthogonal handedness. By synthesizing the propagation phase and geometric phase, the appropriate Jones matrix is calculated to obtain independent wavefront manipulation of EM waves with opposite circular polarizations. Two transmissive ultra-thin meta-deflectors are proposed to demonstrate the asymmetrical refraction of transmitted circularly polarized waves in the microwave region. Simulated transmitted phase front and measured far-field intensity distributions are in excellent agreement, indicating that the transmitted wave with different polarizations can be refracted into arbitrary and independent directions within a wide frequency band (relative bandwidth of 25%). The results presented in this paper provide more freedom for the manipulation of EM waves, and motivate the realizations of various polarization-independent properties for all frequency spectra.
基金项目：National Natural Science Foundation of China (NSFC)10.13039/501100001809 (61771172, 61571155, 61401122); Open Project of State Key Laboratory of Millimeter Waves (K201828).
Kuang Zhang：Department of Microwave Engineering, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Millimeter Waves, Nanjing 210096, China
Xumin Ding：Department of Microwave Engineering, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Millimeter Waves, Nanjing 210096, Chinae-mail: email@example.com
Badreddine Ratni：LEME, UPL, Université Paris Nanterre, F92410 Ville d’Avray, France
Shah Nawaz Burokur：LEME, UPL, Université Paris Nanterre, F92410 Ville d’Avray, Francee-mail: firstname.lastname@example.org
Qun Wu：Department of Microwave Engineering, Harbin Institute of Technology, Harbin 150001, China
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Yueyi Yuan, Kuang Zhang, Xumin Ding, Badreddine Ratni, Shah Nawaz Burokur, and Qun Wu, "Complementary transmissive ultra-thin meta-deflectors for broadband polarization-independent refractions in the microwave region," Photonics Research 7(1), 80-88 (2019)