Two-dimensional electron gas in δ-doped double quantum wells for photodetector application

Abstract

The two-dimensional electron gas in δ-doped double quantum wells has been studied by using the Shubnikov-de Haas measurement. It was discovered that the δ-doping layer at the central barrier is able to prevent the electron coupling in the two wells and that the persistent photoconductivity can be reduced due to the thinner barrier. A δ-doped multiple quantum well structure for photodetector application was also proposed. © 1997 American Institute of Physics.