Patent ID: 6294795
Filing Date: 2001-09-25
Classification: B82Y,H01L,Y10S

Abstract:
A light-receiving device which converts an incident light into an electric current, comprising:quantum-wave interference layer units having plural periods of a pair of a first layer and a second layer, said second layer having a wider band gap than said first layer; anda carrier accumulation layer disposed between adjacent two of said quantum-wave interference layer units;wherein the thickness of said first layer (D.sub.W) is equal to D.sub.W =n.sub.W.lambda..sub.W /4, where n.sub.W is an odd number and .lambda..sub.W is a quantum-wave wavelength of carriers in the first layer, wherein .lambda..sub.W =h/[2m.sub.W (E+V)].sup.1/2, where h represents Plank's constant, m.sub.W represents an effective mass of said carriers in said first layer, E represents a kinetic energy of carriers in said second layer, V represents a difference in carrier potential energy between said first and said second layer, and E.ltoreq.V/9;the thickness of said second layer (D.sub.B) is equal to D.sub.B =n.sub.B.lambda..sub.B /4, where n.sub.B is an odd number and .lambda..sub.B is a quantum-wave wavelength of said carriers in the second layer, wherein .lambda..sub.B =h/(2m.sub.B E).sup.1/2, where m.sub.B represents an effective mass of said carrier in said second layer; andthe carriers in said first and second layers are selected from the group consisting of electrons and holes.