TITLE

Physics of the enhancement of impact ionization in multiquantum well structures

AUTHOR(S)
Brennan, Kevin; Hess, Karl; Capasso, Federico
PUB. DATE
June 1987
SOURCE
Applied Physics Letters;6/29/1987, Vol. 50 Issue 26, p1897
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present an analytical theory of the experimentally observed enhanced impact ionization rate in multiquantum well structures, which is based on a modification of Schockley’s [Solid State Electron. 2, 35 (1961)] lucky electron theory. The general expression always predicts an enhancement in the ionization rate over the corresponding bulk value. The model is compared to both Monte Carlo calculations and recent experimental results. It is concluded that owing to the nonlinear aspects of impact ionization, the ionization rate can be significantly enhanced by the superposition of a uniform electric field and any spatially periodic electric field.
ACCESSION #
9823398

 

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