Topological beaming of light: Proof-of-concept experiment

TL;DR

This paper demonstrates a novel topological approach to beam shaping in nanophotonics using Jackiw-Rebbi states in metasurfaces, enabling precise and customizable beam profiles through engineered Dirac-mass distributions.

Contribution

It introduces a new topological method for beam shaping in nanophotonics using Dirac-mass engineered metasurfaces and Jackiw-Rebbi states, moving beyond heuristic optimization.

Findings

Successful experimental creation of topological beam profiles

Achievement of flat-top beam via Dirac mass tailoring

Confirmation of localized Jackiw-Rebbi states

Abstract

Beam shaping in nanophotonic systems remains a challenge due to the reliance on complex heuristic optimization procedures. In this work, we experimentally demonstrate a novel approach to topological beam shaping using Jackiw-Rebbi states in metasurfaces. By fabricating thin-film dielectric structures with engineered Dirac-mass distributions, we create domain walls that allow precise control over beam profiles. We observe the emergence of Jackiw-Rebbi states and confirm their localized characteristics. Notably, we achieve a flat-top beam profile by carefully tailoring the Dirac mass distribution, highlighting the potential of this method for customized beam shaping. This experimental realization establishes our approach as a new mechanism for beam control, rooted in topological physics, and offers an efficient strategy for nanophotonic design.