T. K. T. Nguyen, T. M. Nguyen, H. Q. Nguyen, T. M. T. Nguyen, T. H. T. Ho, M. Pham Tra, D. L. Vu and H. Nguyen Thi Quynh, A simple design of water-based broadband metamaterial absorber for THz applications, Comm. Phys. 33 (2023) 93. DOI: https://doi.org/10.15625/0868-3166/17484.