山西大学激光光谱研究所

Recently, the research group has made significant progress in the study of non-Hermitian twisted photonic lattices. The related research results were published in the journal Light Manipulation & Applications under the title "Non-Hermitian twisted photonic lattices". Professor Yuan Jinpeng is the first author of the paper, and Professors Wang Lirong and Chen Gang are the co-corresponding authors. Professors Jia Suotang and Xiao Liantuan provided important guidance for this work.

Recently, the research team successfully demonstrated for the first time in experiments the implementation of a high-dimensional frequency converter using a perfect Poincaré beam. By utilizing the spatial amplitude, spatial phase, and spatial polarization degrees of freedom, the high fidelity of information transmission was ensured. The research team prepared the perfect Poincaré beam with precisely controllable parameters using a Mach-Zehnder interferometer and a liquid crystal spatial light modulator. They constructed a Sagnac nonlinear interferometer to induce the four-wave mixing process with two orthogonal polarization components, thereby achieving frequency conversion of any Poincaré state. Based on the spatial Stokes measurement method, they extracted six polarization components from the signal light and the output light, proving the consistency of their spatial topological structures. They achieved a fidelity of over 99% for any Poincaré state and utilized the radial degree of freedom for mode multiplexing, further increasing the system capacity. This research achievement was published online in the journal "Laser & Photonics Reviews" on July 5, 2024, under the title "High-fidelity frequency converter in high-dimensional spaces".

Recently, the research team successfully demonstrated for the first time in experiments the cross-band transmission of a spatio-temporal optical Ferris wheel beam using nonlinear frequency conversion. They prepared a spatio-temporal optical Ferris wheel beam with precisely controllable spatial structure and temporal characteristics using an optical frequency comb and optical vortex. Through the four-wave mixing process in a rubidium atomic medium, they achieved the transmission of the spatio-temporal optical Ferris wheel beam from the near-infrared band to the blue-violet band. The transfer of spatial characteristics was verified by using the same multi-peak intensity distribution for the input and output spatio-temporal optical Ferris wheel beams. The temporal characteristics transfer of the spatio-temporal optical Ferris wheel beam was confirmed by verifying the completely synchronized rotation speed and direction, resulting in a transfer accuracy of approximately 98%. This research achievement was published online in the journal "Photonics Research" on October 31, 2024, under the title "Trans-spectral transfer of spatio-temporal optical Ferris wheel with nonlinear wave mixing".

Recently, the research group has made significant progress in the field of mid-infrared spatial resolution detection. The related research results were published online in the journal ACS Photonics on September 11, 2025, under the title "Angle-resolved mid-infrared detection based on noncollinear configuration". Doctoral students Liu Ning and Wang Xuewen are the co-first authors of the paper, Professors Yuan Jinpeng and Wang Lirong are the co-corresponding authors, and Professors Xiao Liantuan and Jia Suotang provided important guidance for this work.