The far-infrared absorption of a periodic 2DEG in the transition regime between weak and strong modulation
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We study the optical absorption of arrays of quantum dots and antidots in a perpendicular homogeneous magnetic field. The electronic system is described quantum mechanically using a Hartree approximation for the mutual Coulomb interaction of the electrons. The evolution of the absorption is traced from the homogeneous to the strongly modulated case identifying the ensuing collective modes, the magnetoplasmons, and their correlations with inherent length scales of the system.
4 pages with included 2 ps-figures, contribution to "Novel Physics in Low-Dimensional Electron Systems" Dresden, July 1997. To appear in Physica E
4 pages with included 2 ps-figures, contribution to "Novel Physics in Low-Dimensional Electron Systems" Dresden, July 1997. To appear in Physica E