Patent ID: 6534758
Filing Date: 2003-03-18
Classification: H01L

Abstract:
A device for the detection of electromagnetic waves comprising at least two photoconductor-based electromagnetic wave detectors, each comprising:at least two separate, flat-shaped, stacked photoconductor-based active detector elements, comprising a common reading contact, the unit being held between two control contact layers; means to apply control voltages to each control contact layer, a voltage applied to the common reading contact layer having a value between the voltages applied to the control contact layers; means connected to the common contact to detect the difference between the photoconduction currents of the detector elements; wherein at least one detector is provided, on one of its plane faces, with a diffraction grating and wherein a subtraction circuit is used to subtract the read signal of a detector not provided with a diffraction grating from the read signal of a detector provided with a diffraction grating.