Abstract:
:Among various flat optical devices, metasurfaces have presented their great ability in efficient manipulation of light fields and have been proposed for variety of devices with specific functionalities. However, due to the high phase dispersion of their building blocks, metasurfaces significantly suffer from large chromatic aberration. Here we propose a design principle to realize achromatic metasurface devices which successfully eliminate the chromatic aberration over a continuous wavelength region from 1200 to 1680 nm for circularly-polarized incidences in a reflection scheme. For this proof-of-concept, we demonstrate broadband achromatic metalenses (with the efficiency on the order of ∼12%) which are capable of focusing light with arbitrary wavelength at the same focal plane. A broadband achromatic gradient metasurface is also implemented, which is able to deflect wide-band light by the same angle. Through this approach, various flat achromatic devices that were previously impossible can be realized, which will allow innovation in full-color detection and imaging.Metasurfaces suffer from large chromatic aberration due to the high phase dispersion of their building blocks, limiting their applications. Here, Wang et al. design achromatic metasurface devices which eliminate the chromatic aberration over a continuous region from 1200 to 1680 nm in a reflection schleme.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Wang S,Wu PC,Su VC,Lai YC,Hung Chu C,Chen JW,Lu SH,Chen J,Xu B,Kuan CH,Li T,Zhu S,Tsai DPdoi
10.1038/s41467-017-00166-7subject
Has Abstractpub_date
2017-08-04 00:00:00pages
187issue
1issn
2041-1723pii
10.1038/s41467-017-00166-7journal_volume
8pub_type
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