One- and few-particle optics of the valence band in lens-shaped Ge/Si quantum dots

The theoretical investigation of one- and few-particle states in asymmetric biconvex lens-shaped Ge/Si quantum dot have been considered. Heavy hole transitions in considered structure have been studied. The behaviors of linear and nonlinear absorption coefficients for different quantum dot geometric parameters have been observed. Pair-interacting few-heavy hole gas has been investigated by modeling the interaction potential between holes in the frame of Moshinsky model. The character of long-wave transitions between the center of mass levels of the system have been obtained when Kohn theorem is realized.