The investigation of the fundamental physics in semiconductor heterostructures is essential to increase understanding of device operation and to achieve optimization of device performance.

We are addressing the challenge of understanding the ramifications of mixed confinement dimensionality in quantum dots in a well (DWELL) heterostructures with two approaches. In the DWELL heterostructure, photogenerated carriers are initially unconfined, but later relax to a two dimensional quantum well and finally to a quasi zero dimensional quantum dot. We are currently studying DWELL carrier dynamics with femtosecond pump-probe spectroscopy. We have examined several approaches to theoretical modeling of the complex electronic confinement potential provided by DWELL structures.

Updated 2/14/06

Fundamental Semiconductor Heterostructure Research