Broadband achromatic optical metasurface devices

Shuming Wang (), Pin Chieh Wu, Vin-Cent Su, Yi-Chieh Lai, Cheng Hung Chu, Jia-Wern Chen, Shen-Hung Lu, Ji Chen, Beibei Xu, Chieh-Hsiung Kuan, Tao Li (), Shining Zhu () and Din Ping Tsai ()
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Shuming Wang: Nanjing University
Pin Chieh Wu: Academia Sinica
Vin-Cent Su: National Taiwan University
Yi-Chieh Lai: National Taiwan University
Cheng Hung Chu: Academia Sinica
Jia-Wern Chen: National Taiwan University
Shen-Hung Lu: National Taiwan University
Ji Chen: Nanjing University
Beibei Xu: Nanjing University
Chieh-Hsiung Kuan: National Taiwan University
Tao Li: Nanjing University
Shining Zhu: Nanjing University
Din Ping Tsai: Academia Sinica

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: 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.

Date: 2017
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DOI: 10.1038/s41467-017-00166-7

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