Electromagnetic wave detector, electromagnetic wave detector array, and image sensor

An electromagnetic wave detector comprising:

• a first ferroelectric layer including a first main surface and having spontaneous polarization;
• a two-dimensional material layer disposed on the first main surface of the first ferroelectric layer;
• a first electrode pair including a first electrode and a second electrode;
• and
• a second electrode pair including a third electrode and a fourth electrode, wherein
• the first electrode pair is electrically connected to the two-dimensional material layer,
• the second electrode pair is electrically connected to the two-dimensional material layer,
• in a plan view of the first main surface, the third electrode and the fourth electrode are disposed to face each other in a first direction perpendicular to a first polarization direction of the spontaneous polarization of the first ferroelectric layer, and
• in the plan view of the first main surface, the first electrode and the second electrode are disposed to face each other in a second direction different from the first direction.