Device for switching optical signal

A device for switching an optical signal, the device comprising:

• a first waveguide constituting a first port;
• a second waveguide constituting a second port;
• and
• a third waveguide constituting a third port,
• wherein the first waveguide is formed of a first material,
• wherein the second waveguide is formed of the first material, and contains, in addition to the first material, a first metamaterial as a second material that experiences phase transition according to temperature, the second material being coupled to an upper end portion of the first material in one section of the second waveguide,
• wherein the third waveguide is formed of the first material, and contains, in addition to the first material, a second metamaterial as the second material that experiences phase transition according to temperature, the second material being coupled to an upper end portion of the first material in one section of the third waveguide,
• wherein the optical signal is input into the first port and is output to one of the second port and the third port on the basis of a combination of a state of the first metamaterial and a state of the second metamaterial,
• wherein the first waveguide and the second waveguide have a gap that is at or below a threshold value, and a grating structure is formed in lateral surfaces of the first waveguide and the second waveguide, the lateral surfaces facing each other, and
• wherein the first waveguide and the third waveguide have a gap that is at or below the threshold value, and a grating structure is formed in lateral surfaces of the first waveguide and the third waveguide, the lateral surfaces facing each other.

A device for switching an optical signal, the device comprising:

• a first waveguide constituting a first port and a second port;
• a second waveguide constituting a third port and a fourth port, the second waveguide perpendicularly intersecting the first waveguide;
• a third waveguide arranged along the first waveguide in such a manner that a region, adjacent to the first port, of the third waveguide and the first port forms a gap that is at or below a threshold value, the third waveguide further being arranged along the second waveguide in such a manner that a region, adjacent to the third port, of the third waveguide and the third port has a gap that is at or below the threshold value;
• a fourth waveguide arranged along the first waveguide in such a manner that a region, adjacent to the second port, of the fourth waveguide and the second port has a gap that is at or below the threshold value, the fourth waveguide further being arranged along the second waveguide in such a manner that a region, adjacent to the third port, of the fourth waveguide and the third port has a gap that is at or below the threshold value;
• a fifth waveguide arranged along the first waveguide in such a manner that a region, adjacent to the first port, of the fifth waveguide and the first port has a gap that is at or below the threshold value, the fifth waveguide further being arranged along the second waveguide in such a manner that a region, adjacent to the fourth port, of the fifth waveguide and the fourth port has a gap that is at or below the threshold value;
• and
• a sixth waveguide arranged along the first waveguide in such a manner that a region, adjacent to the second port, of the sixth waveguide and the second port has a gap that is at or below the threshold value, the sixth waveguide further being arranged along the second waveguide in such a manner that a region, adjacent to the fourth port, of the sixth waveguide and the fourth port has a gap that is at or below the threshold value,
• wherein the first waveguide and the second waveguide are formed of a first material,
• wherein each of the third waveguide, the fourth waveguide, the fifth waveguide, and the sixth waveguide is formed of the first material, and contains, in addition to the first material, a second material that experiences phase transition according to temperature, the second material being coupled to an upper end portion of the first material in one section, and
• wherein an optical signal that is input into the first port is output to one of the second port, the third port, and the fourth port on the basis of a combination of states of metamaterials contained in the third waveguide, the fourth waveguide, the fifth waveguide, and the sixth waveguide, respectively.