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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...
We demonstrate metamaterial-based electro-absorption THz modulators employing frequency-selective-surfaces (FSS) and graphene. By placing the graphene layer at an optimal distance from the FSS, the sensitivity of THz transmittance can be greatly enhanced.
We show that wetting of MgF2 films can be affected by gold films and metamaterial substrates separated from the water droplet by as much as several tens on nanometers.
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