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Ultrathin Pancharatnam–Berry Metasurface with Maximal Cross‐Polarization Efficiency

2014; Volume: 27; Issue: 7 Linguagem: Inglês

10.1002/adma.201405047

1521-4095

Xumin Ding, Francesco Monticone, Kuang Zhang, Lei Zhang, Dongliang Gao, Shah Nawaz Burokur, A. de Lustrac, Qun Wu, Cheng‐Wei Qiu, Andrea Alù,

Antenna Design and Analysis

Novel ultrathin dual-functional metalenses are proposed, fabricated, tested, and verified in the microwave regime for the first time. The significance is that their anomalous transmission efficiency almost reaches the theoretical limit of 25%, showing a remarkable improvement compared with earlier ultrathin metasurface designs with less than 5% coupling efficiency. The planar metalens proposed empowers significant reduction in thickness, versatile focusing behavior, and high transmission efficiency simultaneously.