Gradient moiré perovskite superlattices for laser beam steering

Nanli Mou; Bing Tang; Delin Zhang; Jingyue Yu; Mou Zhong; Zichun Bai; Xiaolu Zhuo; Biye Xie; Zhaoyu Zhang; Shikai Deng; Andrey L. Rogach; Jingtian Hu; Jun Guan

doi:10.1126/sciadv.adz8028

Gradient moiré perovskite superlattices for laser beam steering

Nanli Mou (Co-first Author), Bing Tang (Co-first Author), Delin Zhang, Jingyue Yu, Mou Zhong, Zichun Bai, Xiaolu Zhuo, Biye Xie, Zhaoyu Zhang, Shikai Deng, Andrey L. Rogach, Jingtian Hu, Jun Guan^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Abstract

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. © 2025 the Authors.

Original language	English
Article number	eadz8028
Number of pages	9
Journal	Science Advances
Volume	11
Issue number	46
Online published	12 Nov 2025
DOIs	https://doi.org/10.1126/sciadv.adz8028
Publication status	Published - 14 Nov 2025

Funding

This work was supported by the National Natural Science Foundation of China (no. 12404442 to J.G., no. 62405076 to J.H., no. 62275257 to S.D., and nos. 62475225 and 12404187 to B.X.), the Guangdong Basic and Applied Basic Research Foundation (no. 2023A1515110685 to J.G., no. 2025A1515011713 to J.H., and no.2024A1515012031 to B.X.), the Shenzhen Science and Technology Program (nos. JCYJ20240813113603005 and RCBS20231211090623036 to J.G., no. JCYJ20240813104929039 to J.H., and no. JCYJ20240813113619025 to B.X.), the 1+1+1 CUHK-CUHK(SZ)-GDSTC Joint Collaboration Fund (to J.G.), the Guangdong Basic Research Center of Excellence for Aggregate Science (to J.G.), the Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems (no. 2023B1212010003 to J.G.), the China Postdoctoral Science Foundation (no. 2024M753105 to N.M.), the Guangdong Provincial Quantum Science Strategic Initiative (no. GDZX2306002 to J.H.), the Research Grant Council of Hong Kong SAR (CityU 11317322 to A.L.R.), the Harbin Engineering University (Qingdao Branch) (to A.L.R.), the Guangdong Key Laboratory of Optoelectronic Materials and Chips (no. 2022KSYS014 to Z.Z.), the Shenzhen Key Laboratory Project (no. ZDSYS201603311644527 to Z.Z.), the Longgang Key Laboratory Project (nos. ZSYS2017003 and LGKCZSYS2018000015 to Z.Z.), the National Key R&D Program of China (no. 2023YFA1407700 to B.X.), the Department of Science and Technology of Guangdong Province (nos. 2023A1515110091 and 2023QN10C200 to X.Z.), and the self-deployed program of Shanghai Institute of Optics and Fine Mechanics (no. E5J05402 to B.T.).

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This full text is made available under CC-BY-NC 4.0. https://creativecommons.org/licenses/by-nc/4.0/

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title = "Gradient moir{\'e} perovskite superlattices for laser beam steering",

abstract = "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 moir{\'e} 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 moir{\'e} photonic superlattices with continuously variable twist angles. We revealed how the moir{\'e} 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 moir{\'e}-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 moir{\'e}-induced light-matter interactions, which opens prospects for programmable and intelligent photonic technologies. {\textcopyright} 2025 the Authors.",

author = "Nanli Mou and Bing Tang and Delin Zhang and Jingyue Yu and Mou Zhong and Zichun Bai and Xiaolu Zhuo and Biye Xie and Zhaoyu Zhang and Shikai Deng and Rogach, {Andrey L.} and Jingtian Hu and Jun Guan",

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doi = "10.1126/sciadv.adz8028",

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AU - Mou, Nanli

AU - Tang, Bing

AU - Zhang, Delin

AU - Yu, Jingyue

AU - Zhong, Mou

AU - Bai, Zichun

AU - Zhuo, Xiaolu

AU - Xie, Biye

AU - Zhang, Zhaoyu

AU - Deng, Shikai

AU - Rogach, Andrey L.

AU - Hu, Jingtian

AU - Guan, Jun

PY - 2025/11/14

Y1 - 2025/11/14

N2 - 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. © 2025 the Authors.

AB - 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. © 2025 the Authors.

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Gradient moiré perovskite superlattices for laser beam steering

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GRF: Lasing from Chiral Microstructures Self-Assembled from Perovskite Quantum Dots

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Gradient moiré perovskite superlattices for laser beam steering

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GRF: Lasing from Chiral Microstructures Self-Assembled from Perovskite Quantum Dots

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