Patent ID: 6043549
Filing Date: 2000-03-28
Classification: H01L,Y02E

Abstract:
A photodetector for generating photocurrent from an input light source having a first wavelength comprising:a first contact layer having a top side, a bottom side and a first polarity; first and second absorption layers each of which being responsive to said input light source, said first absorption layer being disposed on said top side of said first contact layer, said second absorption layer being disposed on said bottom side of said first contact layer, said first and second absorption layers being responsive to said input light source and operative to generate therefrom first and second photocurrents, respectively;second and third contact layers, said second contact layer being disposed on said first absorption layer, said third contact layer being disposed on said second absorption layer, said second and third contact layers having a second polarity opposite said first polarity, said second and third contact layers collecting said first and second generated photocurrents, respectively; and,photocurrent addition means for adding together said first and second photocurrents.