(Invited) Phase and amplitude gradient engineering for metasurface vortex beam emission

Fang, Xu (2024) (Invited) Phase and amplitude gradient engineering for metasurface vortex beam emission. 13th Applied Optics and Photonics China (AOPC 2024), , Beijing, China. 23 - 26 Jul 2024. 2 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

For many applications such as remote sensing and free-space communications, the use of integrated photonic chips for the generation of optical vortex beam is highly desired, as this device format could leverage the mass production capability of semiconductor fabrication foundries. At the University of Southampton, my team has explored a few methods in this research direction. We started with using microring resonators, where nonlinear optical effects and coherent tuning are utilized to control the vortex emission. More recently, we have explored the use of metasurfaces for this purpose, which inherently brings a high level of control over the propagation of light. We demonstrate that, by engineering the phase and amplitude gradients of waveguide-integrated metasurfaces, conjugate symmetry in light emission can be broken, bringing more freedom in topological light creation. Controlling the gradients also allows for the creation of a large topological charge, which is usually a challenging task for planar vortex beam emission.

Text

Invited talk_FANG_Southampton - Accepted Manuscript

Available under License Creative Commons Attribution No Derivatives.

Download (175kB)