High efficiency and scalable fabrication of fresnel zone plates using holographic femtosecond pulses.

ABSTRACT: To meet the growing demand for photonic integration and device miniaturization, planar diffractive Fresnel zone plates (FZPs) are widely applied in integrated optical systems. However, challenges remain in fabricating FZPs with high efficiency and satisfying the requirement for cross-scale fabrication. This paper details a high efficiency method for fabricating ultrathin FZPs of different scales on metal films by using holographic femtosecond lasers. The FZPs are split into a series of element patterns that are printed in order by using corresponding modulated femtosecond pulses. The fabricated FZPs are spliced by the printed element structures with no FZP size limitation in theory. FZPs with an area varying across three orders of magnitude are presented to demonstrate the capability of cr

SUBMITTER: Wang Z 

PROVIDER: S-EPMC11501355 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature