Journals Proceedings

Abstract

A Fresnel zone plate is a flat and compact lens. This paper reports research into Fresnel zone plate constructed using graphene rings. The tunable lensing effect of the lenses was designed and analysed using FDTD method. Then graphene Fresnel zone plate array were fabricated with CVD and photolithography processes. The effect of the lenses was characterized under optical microscope. The experimental results demonstrate that the flat lenses with graphene rings have the ability to focus light with high contrast. The research demonstrates that graphene rings can work in Fresnel zone plates. The optical property of the graphene rings can be tuned by voltage and thus the focal intensity.