258 citations · 903 across the 15 of their papers we have counts for
7 papers · 1 filter
Ultrafast dynamics of hot charge carriers in an oxide semiconductor probed by femtosecond spectroscopic ellipsometry
Steffen Richter, Oliver Herrfurth, Shirly Espinoza +8
Many linked processes occur concurrently in strongly excited semiconductors, such as interband and intraband absorption, scattering of electrons and holes by the heated lattice, Pa…
Strain and Band-Gap Engineering in Ge-Sn Alloys via P Doping
Slawomir Prucnal, Yonder Berencén, Mao Wang +19
Ge with a quasi-direct band gap can be realized by strain engineering, alloying with Sn, or ultrahigh n-type doping. In this work, we use all three approaches together to fabricate…
Raman tensor elements of
Christian Kranert, Chris Sturm, Rüdiger Schmidt-Grund +1
The Raman spectrum and particularly the Raman scattering intensities of monoclinic are investigated by experiment and theory. The low symmetry of $β\text{…
Dipole Analysis of the Dielectric Function of Colour Dispersive Materials: Application to Monoclinic GaO
Chris Sturm, Rüdiger Schmidt-Grund, Christian Kranert +3
We apply a generalized model for the determination and analysis of the dielectric function of optically anisotropic materials with colour dispersion to phonon modes and show that i…
Dielectric tensor of monoclinic GaO single crystals in the spectral range eV
Chris Sturm, Jürgen Furthmüller, Friedhelm Bechstedt +2
The dielectric tensor of -GaO was determined by generalized spectroscopic ellipsometry in a wide spectral range from to as well as…
Comparative Study of Optical and Magneto-Optical Properties of Normal, Disordered and Inverse Spinel Type Oxides
Vitaly Zviagin, Peter Richter, Tammo Böntgen +6
CoO, ZnFeO, CoFeO, ZnCoO, and FeO thin films were fabricated by pulsed laser deposition at high and low temperatures resulting in crystallin…
Phonon-Assisted Lasing in ZnO Microwires at Room Temperature
T. Michalsky, M. Wille, C. P. Dietrich +4
We report on room temperature phonon-assisted whispering gallery mode (WGM) lasing in ZnO microwires. For WGM laser action on the basis of the low gain phonon scattering process hi…