Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces.

ABSTRACT: Metasurfaces have appeared as a versatile platform for miniaturized functional nonlinear optics due to their design freedom in tailoring wavefronts. The key factor that limits its application in functional devices is the low conversion efficiency. Recently, dielectric metasurfaces governed by either high-quality factor modes (quasi-bound states in the continuum) or Mie modes, enabling strong light-matter interaction, have become a prolific route to achieve high nonlinear efficiency. Here, an effective way of spatial nonlinear phase control by using the Pancharatnam-Berry phase principle with a high third harmonic conversion efficiency of 10^-4 W^-2 is demonstrated both numerically and experimentally. It is found that the magnetic Mie resonance appears to be the main con

SUBMITTER: Reineke Matsudo B 

PROVIDER: S-EPMC9036049 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature