Time-varying Nanophotonics

I am currently investigating time-varying metamaterials, which I explore experimentally with  ultrafast optical modulation of epsilon-near-zero thin-films. In pump-probe spectroscopy experiments, I use spatial and temporal shaping of short laser pulses to induce a variation of the optical response of the metamaterial. I have observed modulation of the frequency content of light (for example via time refraction) in these non-Hermitian systems. My role is to design, model and experimentally characterize such systems.