Topological Beaming of Light: Proof-of-concept Experiment

Overview

Journal Light Sci Appl

Publisher Springer Nature

Date 2025 Mar 13

PMID 40075060

Authors

Yu Sung Choi

Ki Young Lee

Soo-Chan An

Minchul Jang

Youngjae Kim

Seungjin Yoon

Seung Han Shin

Jae Woong Yoon

Affiliations

Soon will be listed here.

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.

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