Observation of nonreciprocal transverse localization of light

Shun Liang, Changchang Li, Zhenzhi Liu, Wenqing Yu, Changbiao Li, Yanpeng Zhang, Guillaume Malpuech, Dmitry Solnyshkov (), Hui Jing () and Zhaoyang Zhang ()
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Shun Liang: Xi’an Jiaotong University, Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Faculty of Electronic and Information Engineering
Changchang Li: Xi’an Jiaotong University, Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Faculty of Electronic and Information Engineering
Zhenzhi Liu: Xi’an Jiaotong University, Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Faculty of Electronic and Information Engineering
Wenqing Yu: Xi’an Jiaotong University, Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Faculty of Electronic and Information Engineering
Changbiao Li: Xi’an Jiaotong University, Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Faculty of Electronic and Information Engineering
Yanpeng Zhang: Xi’an Jiaotong University, Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Faculty of Electronic and Information Engineering
Guillaume Malpuech: Clermont INP, Institut Pascal, PHOTON-N2, Université Clermont Auvergne, CNRS
Dmitry Solnyshkov: Clermont INP, Institut Pascal, PHOTON-N2, Université Clermont Auvergne, CNRS
Hui Jing: Hunan Normal University, Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications
Zhaoyang Zhang: Xi’an Jiaotong University, Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Faculty of Electronic and Information Engineering

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract Magnetic-free nonreciprocal optical devices that prevent backscattering of signals are essential for optical information processing. The achieved nonreciprocal behaviors mostly rely on various optical dispersive effects, leading to dispersive modulations of the spatial beam profiles, such as broadening and discretization, of incident signals. Such deformation inevitably reduces the matching with subsequent functional components. Here, we experimentally demonstrate the nonreciprocal transverse localization of light in a moiré photonic lattice in atomic vapors. When the probe field co- or counter-propagates with the forward coupling field with a honeycomb moiré profile, the output pattern can exhibit localized or dispersive behavior. The nonreciprocal behaviors (in both beam size and transmitted intensity) are from the atomic thermal motion. A backward Gaussian coupling field is also introduced to modulate the size and intensity of the backward probe, which experiences dispersive propagation. The current work provides an approach to control the transverse beam profile in nonreciprocal transmission.

Date: 2025
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DOI: 10.1038/s41467-025-65084-5

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