Stark effects and electro-optical properties of strongly stacked dots

We present the results of effective mass calculations for the optical prope rties of stacked quantum dots in the presence of a longitudinal electric fi eld. Attention is focused on strongly stacked dots structures where we show that a vertical field acts on the electron much in the same way as found i n one-dimensional quantum well structures. As a consequence their Stark tun ability can be made much larger than their inhomogeneous broadening. The el ectro-optical absorption probabilities of stacked dots for intraband and in terband transitions are quantitatively calculated taking into account gauss ian fluctuations in the vertical and lateral dimensions. (C) 2001 Elsevier Science Ltd. All rights reserved.