  In the field of metamaterials, many intriguing phenomena arise from having a
structure which is periodic in space. In time-dependent structures,
conceptually similar properties can arise, which nevertheless have
fundamentally different physical implications. In this work, we study
time-dependent systems in the context of subwavelength metamaterials. The main
result is a capacitance matrix characterization of the band structure, which
generalizes previous recent work on static subwavelength metamaterials. Based
on this characterization, we numerically compute the dispersion relationship of
several time-dependent structures exhibiting interesting wave manipulation
properties.
