10 citations · 29 across the 4 of their papers we have counts for
4 papers
An ab initio based approach to optical properties of semiconductor heterostructures
L. C. Bannow, P. Rosenow, P. Springer +5
A procedure is presented that combines density functional theory computations of bulk semiconductor alloys with the semiconductor Bloch equations, in order to achieve an ab initio…
Density dependent exciton dynamics and L valley anisotropy in germanium
Markus Stein, Christian Lammers, Phillip Springer +4
Optical pump-THz probe spectroscopy is used to investigate the exciton formation dynamics and its intensity dependence in bulk Ge. Associated with the intra-excitonic 1s-2p transit…
Excitonic terahertz absorption in semiconductors with effective-mass anisotropies
P. Springer, S. W. Koch, M. Kira
A microscopic approach is developed to compute the excitonic properties and the corresponding terahertz response for semiconductors characterized by anisotropic effective masses. T…
Hybrid cluster-expansion and density-functional-theory approach for optical absorption in TiO2
O. Vänskä, M. Ljungberg, P. Springer +3
A combined approach of first-principles density-functional calculations and the systematic cluster-expansion scheme is presented. The dipole, quadrupole, and Coulomb matrix element…