Electromagnetic wave control apparatus

An electromagnetic wave control apparatus, comprising:

• an upper electrode layer;
• a lower electrode layer;
• a liquid crystal layer;
• a first metamaterial layer located on a lower surface of the liquid crystal layer, the first metamaterial layer comprising a first array comprising first alignment unit structures and a third array comprising third alignment unit structures;
• a second metamaterial layer located on an upper surface of the liquid crystal layer, the second metamaterial layer comprising a second array comprising second alignment unit structures;
• a first voltage source configured to supply a first voltage to the first alignment unit structures;
• and
• a third voltage source configured to supply a third voltage to the third alignment unit structures,
• wherein the first alignment unit structures and the third alignment unit structures are configured to implement, at a single metamaterial layer, alignment on liquid crystal molecules in the liquid crystal layer in two different directions,
• wherein the liquid crystal layer and the first metamaterial layer are disposed between the upper electrode layer and the lower electrode layer, and
• wherein the first voltage source and the third voltage source are configured to supply different voltages to the first alignment unit structure and to the third alignment unit structure.