Electric control of reflection in metamaterial — Twisted nematics liquid crystal cell structure

We fabricated an electrically tunable metamaterial based on twisted nematics liquid crystal cell, where polarization dependent reflectance of the metamaterial can be controlled via applied voltage. When the metamaterial-twisted nematics liquid crystal cell is driven with a voltage above the threshold, optical reflection of the cell has changed. Our result provides the possibility of tuning the frequency selective properties of metamaterials by applied voltage.