Gradient moiré perovskite superlattices for laser beam steering
Manipulation of laser emission characteristics plays a key role in diverse technologies. However, compact lasers with internal beam steering functionalities remain a challenge. Here, we demonstrate how gradient moiré perovskite superlattices can facilitate dynamic laser beam steering. By combining a two-dimensional (2D) square lattice with a globally curved 1D perovskite grating, we fabricated gradient moiré photonic superlattices with continuously variable twist angles. We revealed how the moiré interlayer coupling at the high-symmetry points on the Brillouin zone boundaries can produce additional cavity modes with twist angle-controlled wave vectors. We showed that the moiré-induced band-edge modes can support lasing with low thresholds. By sweeping the pump area to access different twist angles, we achieved tuning of laser emission angles in a continuous and wide range (>30°) from a single device. Our work provides a highly tunable platform for moiré-induced light-matter interactions, which opens prospects for programmable and intelligent photonic technologies.
Authors
- Jingtian Hu (ORCID: https://orcid.org/0000-0002-0528-6250)
- Delin Zhang (ORCID: https://orcid.org/0000-0002-0966-997X)
- Biye Xie (ORCID: https://orcid.org/0000-0001-7258-8913)
- Xiaolu Zhuo (ORCID: https://orcid.org/0000-0002-5895-3336)
- Andrey L. Rogach (ORCID: https://orcid.org/0000-0002-8263-8141)
- Jun Guan (ORCID: https://orcid.org/0000-0001-8667-1611)
- Zhaoyu Zhang (ORCID: https://orcid.org/0000-0003-0335-0535)
- Nanli Mou (ORCID: https://orcid.org/0000-0003-3946-4534)
- Mou Zhong (ORCID: https://orcid.org/0009-0009-7198-9796)
- Shikai Deng (ORCID: https://orcid.org/0000-0002-1895-2072)
- Bing Tang (ORCID: https://orcid.org/0000-0001-6958-8875)
- Jingyue Yu (ORCID: https://orcid.org/0000-0002-9881-0479)
- Zichun Bai (ORCID: https://orcid.org/0009-0009-0581-9019)
Institutions
- City University of Hong Kong (HK)
- Chinese Academy of Sciences (CN)
- Harbin Institute of Technology (CN)
- State Key Laboratory of Transducer Technology (CN)
- Chinese University of Hong Kong, Shenzhen (CN)
- Shanghai Institute of Optics and Fine Mechanics (CN)
- Shanghai Institute of Microsystem and Information Technology (CN)
- University of Chinese Academy of Sciences (CN)
- Ministry of Industry and Information Technology (CN)
Publication Details
- Journal
- Science Advances
- Published
- 2025-11-12
- DOI
- https://doi.org/10.1126/sciadv.adz8028
- Citations
- 1
- Primary Topic
- Strong Light-Matter Interactions
- Type
- article
- Field-Weighted Citation Impact
- 1.25
Funders
- City University of Hong Kong
- Chinese Academy of Sciences
- Harbin Institute of Technology
- Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences
- Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences