Tay, F., Mojibpour, A., Sanders, S., Liang, S., Xu, H., Gardner, G. C., Baydin, A., Manfra, M. J., Alabastri, A., Hagenmüller, D., Kono, J. (2025). Multimode ultrastrong coupling in three-dimensional photonic-crystal cavities. Nature Communications. https://doi.org/10.1038/s41467-025-58835-x