Cui, Z., Gong, Y., Yu, W., Xia, S., He, Z., Tang, X., Zheng, B., Wang, H., Ma, W., Zhang, Y., Chen, H., Wu, Y. (2025). A lithography-free approach to polaritonic Luneburg lenses. Nature Communications. https://doi.org/10.1038/s41467-025-63097-8