Ultrathin pancharatnam-berry metasurface with maximal cross-polarization efficiency.
basic_science · Level V
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- Record sourced from PubMed, PMID 25545285.
- Also identified by DOI 10.1002/adma.201405047.
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Abstract
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.