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Space-time metamaterials
In this talk, I will present a pedagogical review of time-varying and space-time varying metamaterials. I will discuss the effects on wave propagation of modulating the refractive index of a material both in space and time. I will discuss various time and space-time modulation mechanisms and shows different examples with water waves, elastic, electromagnetic and optical waves. I will conclude by introducing the concept of space-time materials in biology where the cardiac cycle is a source of space-time modulation of cardiac tissue elasticity.