#  Multifunctional metasurfaces by dispersion engineering 

 





May 23, 2020

 

 

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   ![Dispersion engineering](/sites/g/files/omnuum6306/files/styles/hwp_1_1__720x720_scale/public/capasso/files/dispersion_engineering.png?itok=yu0Ik1St) 

 

 In this recently published work, we show that, by engineering the dispersion of each constituent nanostructure, a metalens can possess two different focal lengths with customized focal length shifts. The focal length shift can be designed with achromatic, refractive, or diffractive behavior. Our method is based on a more general design strategy by considering phase and group delay profiles for potential applications in imaging, spectroscopy, and wearable optical devices.

 For more information, visit <https://aip.scitation.org/doi/10.1063/10.0001351>.



 

 

 



 

 

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