US 12,189,267 B2
Reflective optical device
Shimpei Ogawa, Tokyo (JP); Masaaki Shimatani, Tokyo (JP); and Shoichiro Fukushima, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/605,239
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jun. 20, 2019, PCT No. PCT/JP2019/024588
§ 371(c)(1), (2) Date Oct. 21, 2021,
PCT Pub. No. WO2020/255357, PCT Pub. Date Dec. 24, 2020.
Prior Publication US 2022/0197107 A1, Jun. 23, 2022
Int. Cl. G02F 1/31 (2006.01)
CPC G02F 1/31 (2013.01) 17 Claims
OG exemplary drawing
 
1. A reflective optical device that makes a reflection direction of an incoming electromagnetic wave variable, the reflective optical device comprising:
an insulator having a first surface and a second surface that are opposed to each other;
a laminated structure part disposed facing the first surface of the insulator;
an electrode part electrically connected with the laminated structure part, to which a voltage is applied; and
a reflective plate disposed facing the second surface of the insulator,
the laminated structure part having a plurality of laminated structures including:
a plurality of first laminated structures having a first width in a first direction, and extending in a second direction that intersects with the first direction, and
a plurality of second laminated structures disposed apart from the first laminated structures in the first direction, having a second width in the first direction and extending in the second direction,
in each of the plurality of laminated structures, a dielectric layer and a first two-dimensional material layer being laminated,
the electrode part having a plurality of electrodes including:
a first electrode that is electrically connected with the first two-dimensional material layer in the first laminated structure, to which a first voltage is applied, and
a second electrode that is electrically connected with the first two-dimensional material layer in the second laminated structure, to which a second voltage is applied,
each of the first laminated structure and the second laminated structure includes a second two-dimensional material layer,
the first two-dimensional material layer is laminated on the second two-dimensional material layer with the dielectric layer interposed therebetween,
the first two-dimensional material layer, the dielectric layer and the second two-dimensional material layer are separated from each other between the plurality of first laminated structures,
the first two-dimensional material layer, the dielectric layer and the second two-dimensional material layer are separated from each other between the plurality of second laminated structures,
a first refractive index of the first two-dimensional material layer in the first laminated structure is varied by the first voltage,
a second refractive index of the first two-dimensional material layer in the second laminated structure is varied by the second voltage, and
the laminated structure part includes:
a first lattice which is a first lattice group including the first laminated structure, and
a second lattice which is a second lattice group including the second laminated structure, wherein
between the insulator and the reflective plate, a substrate in which photoelectric conversion is caused by the incoming electromagnetic wave is disposed.