Regensburg 2007 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 53: Ultra fast phenomena
HL 53.1: Vortrag
Freitag, 30. März 2007, 11:00–11:15, H15
Aspects of heavy-hole light-hole band mixing effects on the coherent optical generation of charge and spin currents in semiconductor heterostructures — •Bernhard Pasenow1, Huynh Thanh Duc1,2, Torsten Meier1, and Stephan W. Koch1 — 1Department of Physics and Material Sciences Center, Philipps University, Renthof 5, D-35032 Marburg — 2Ho Chi Minh City Institute of Physics, Viet Nam Center for Natural Science and Technology, 1 Mac Dinh Chi, Ho Chi Minh City, Vietnam
The coherent optical injection and temporal decay of spin and charge currents in semiconductor heterostructures has be described on a microscopic basis including Coulomb and phononic effects up to the level of second-order Born contributions [1,2]. In this talk the previously used two-band effective mass approach is extended to a multi-band approach using realistic microscopic kp matrix elements. Furthermore, the influence of heavy-hole light-hole band-mixing contained in the kp calculation and its effects on the microscopic semiconductor dynamics is demonstrated and discussed [3].
[1] H.T. Duc, T. Meier, and S.W. Koch, Phys. Rev. Lett. 95, 086606 (2005).
[2] H.T. Duc, Q.T. Vu, T. Meier, H. Haug, and S.W. Koch, Phys. Rev. B 74, 165328 (2006)
[3] B. Pasenow, T. Meier, and S.W. Koch, unpublished