Electromagnetic wave detector and electromagnetic wave detector array

An electromagnetic wave detector comprising:

• a semiconductor layer;
• a two-dimensional material layer electrically connected to the semiconductor layer;
• a first electrode portion electrically connected to the two-dimensional material layer;
• a second electrode portion electrically connected to the two-dimensional material layer with the semiconductor layer interposed between the second electrode portion and the two-dimensional material layer;
• an insulating film that is arranged on the semiconductor layer, and is provided with an opening;
• and
• a ferroelectric layer electrically connected to at least any one of the first electrode portion, the second electrode portion and the semiconductor layer,
• the ferroelectric layer being arranged such that resistance between the first electrode portion and the second electrode portion changes when polarization inside the ferroelectric layer is changed by application of an electromagnetic wave, an electric field generated from the ferroelectric layer being shielded with respect to the two-dimensional material layer, a Fermi level of the two-dimensional material layer being configured so as not to be changed by an electric field effect of an electric field generated from the ferroelectric layer, or the ferroelectric layer being arranged so as not to be overlapped with the two-dimensional material layer in plan view, and
• the two-dimensional material layer is electrically connected to the semiconductor layer in the opening, and extends from above the opening to the insulating film.