Epsilon-near-zero metamaterials for tailoring ultrashort pulses

摘要

Interaction between epsilon-near-zero (ENZ) metamaterials and optical pulses is investigated theoretically. A transform between total transmission and total reflection is revealed for the ultrashort pulses incident onto an ENZ slab, which can be controlled by changing the thickness of the slab. Furthermore, the resonance of the ENZ materials leads to a cutoff frequency in spectroscopic response, where longer wavelengths have no chance to propagate through the ENZ materials and are totally reflected. These characteristics enable the ENZ materials to be applied in ultrashort pulse shapers, cutoff filters, and Fabry-Perot resonators.