Patent ID: 8304731
Filing Date: 2012-11-06
Classification: B82Y,H01L

Abstract:
1. An infrared light detector, comprising: a first electronic layer as a two dimensional electronic layer; an excitation mechanism configured to excite an electron n in the first electronic layer between sub-bands in a quantum well formed in an electrically isolated region by an oscillating electric field component perpendicular to the first electronic layer induced by an incident infrared light; and a second electronic layer disposed below the first electronic layer through an interlayer within a distance by which an electrostatic force of the first electronic layer influences on the second electric layer, whose electrical conductivity varies because of an electrical charge of the isolated region varied by the flowing out of the electron excited by the excitation mechanism from the isolated region, which detects the incident infrared light by detecting a variation pattern on the electrical conductivity of the second electronic layer, wherein the infrared light detector includes a status controlling mechanism configured to perform switching between a disconnected status in which an electron from an outer electron system is limited or prohibited from flowing into the isolated region and a connected status in which an electron from the outer electron system is permitted to flow into the isolated region according to the detection result of the variation pattern on the electrical conductivity of the second electronic layer in detecting the infrared light.