Abstract

Transfer time of non-equilibrium carriers into quantum wells (QW) is a parameter of major importance as far as the modulation speed of QW lasers is concerned. In the case of carrier excitation in the vicinity of a QW, carrier capture is purely quantum mechanical and occurs in less than a ps.^[1] If the carriers are excited at a distance exceeding 500 Å from the well, classical transport has to be considered. In QW structures with no built in electric fields diffusion is assumed to be the main mechanism of the carrier transfer.

© 1992 IQEC