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Designer Graphene oxide ultrathin flat lens with versatile focusing property

Version 2 2024-02-08, 22:28
Version 1 2024-02-08, 22:28
Posted on 2024-02-08 - 22:28
Graphene oxide (GO) flat lens has a thickness in nanoscale. They modulates the light field via both phase and amplitude modulation and hence possess excellent focusing property. In this paper, we develop a systematic design method to realize the ultrathin GO flat lens with various focusing properties. By using the Rayleigh-Sommerfield theory, the focusing property of ultrathin GO lenses is accurately calculated, then the genetic algorithm (GA) is employed to design the GO lenses. The lens works at visible frequency can have a large radius and long working distance. By setting different optimization objectives, extraordinary focusing property including sub-diffraction limit focusing with FWHM ($\sim$1.96$\lambda$) and achromatic focusing with the wavelengths (450 nm, 550 nm, 650 nm) can be achieved. These innovative designs are fabricated and tested.

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AUTHORS (4)

Xueyan Li
Fei Meng
Yuxi Chen
Yun Xu

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