Electromagnetic wave detector and electromagnetic wave detector array

An electromagnetic wave detector comprising:

• a two-dimensional material layer including a first region and a second region disposed side by side in a first direction;
• a first electrode portion and a second electrode portion spaced from each other in the first direction and electrically connected to each other via the first region and the second region of the two-dimensional material layer;
• a first ferroelectric layer having a portion overlapping with the first region of the two-dimensional material layer in a plan view;
• and
• a second ferroelectric layer having a portion overlapping with the second region of the two-dimensional material layer in the plan view, wherein
• a boundary between the first ferroelectric layer and the second ferroelectric layer extends in a direction intersecting the first direction,
• a material of each of the first ferroelectric layer and the second ferroelectric layer is a pyroelectric substance,
• the first ferroelectric layer and the second ferroelectric layer are provided such that, when irradiated with an electromagnetic wave, a voltage change that occurs in the first region is different from a voltage change that occurs in the second region,
• the electromagnetic wave detector further comprising a semiconductor layer disposed above the second ferroelectric layer and forming a Schottky junction with the second region of the two-dimensional material layer, wherein
• the second electrode portion is electrically connected to the first electrode portion via the first region and the second region of the two-dimensional material layer and the semiconductor layer.