R. Duggan, H. Moussa, Y. Ra’di, D. Sounas, and A. Alù, Stability Bounds on Superluminal Propagation in Active Structures. Nature Communications, 2022, 13 (1115).
R. Duggan, H. Moussa, Y. Ra’di, D. Sounas, and A. Alù, Stability Bounds on Superluminal Propagation in Active Structures. Nature Communications, 2022, 13 (1115).