In this work consideration is given to the dynamics of carriers in the continuum/quantum well systems and how this relates to the photoconductive gain of quantum well infrared photodetectors. In particular the quantum mechanical scattering theory approach, taking into account e-LO phonon and e-e scattering is invoked to evaluate the capture probability from the continuum into the quantum wells. It is shown that the capture probability Pc is dependent on the quantum well width. The capture probability microscopic model is then utilized to introduce an additional tunnel barrier to disturb the continuum levels near the top of the quantum well. This induction enabled us to investigate the double-barrier improvements in the photoconductive gain.
|Number of pages||5|
|Journal||Infrared Physics and Technology|
|Early online date||12 Aug 2003|
|Publication status||Published - 1 Oct 2003|
|Event||Workshop on Quantum Well Infrared Photodetectors - Torino, Italy|
Duration: 13 Oct 2002 → 17 Oct 2002