@article{TalalaevTommElsaesseretal.2005, author = {Talalaev, V and Tomm, JW and Elsaesser, T and Zeimer, Ute and Fricke, J and Knauer, A and Kissel, H and Weyers, Markus and Tarasov, GG and Grenzer, J{\"o}rg and Pietsch, Ullrich}, title = {Carrier dynamics in laterally strain-modulated InGaAs quantum wells}, year = {2005}, abstract = {We investigate the transient recombination and transfer properties of nonequilibrium carriers in an In0.16Ga0.84As/GaAs quantum well (QW) with an additional lateral confinement implemented by a patterned stressor layer. The structure thus contains QW- and quantum-wire-like areas. At low excitation densities, photoluminescence (PL) transients from both areas are well described by a rate equation model for a three-level system with a saturable interlevel carrier transfer representing the lateral drift of carriers from the QW regions into the wires. Small-signal carrier lifetimes for QW, wires, and transfer time from QW to wire are 180, 190, and 28 ps, respectively. For high excitation densities the time constants of the observed transients increase, in agreement with the model. In addition, QW and wire PL lines merge indicating a smoothening of the potential difference, i.e., the effective carrier confinement caused by the stressor structure becomes weaker with increasing excitation. (c) 2005 American Institute of Physics}, language = {en} } @article{RosePietschZeimer1997, author = {Rose, Dirk and Pietsch, Ullrich and Zeimer, Ute}, title = {Characterization of InGaAs single quantum wells buried in GaAs[001] by grazing incidence diffraction}, year = {1997}, language = {en} } @article{StoemmerZeimerPietsch1995, author = {St{\"o}mmer, Ralph and Zeimer, Ute and Pietsch, Ullrich}, title = {Diffuse R{\"o}ntgenstreuung an LB-Filmen}, year = {1995}, language = {de} } @article{ZeimerBuggeGramlichetal.2000, author = {Zeimer, Ute and Bugge, F. and Gramlich, S. and Smirnitzki, V. and Weyers, Markus and Tr{\"a}nkle, G. and Grenzer, J{\"o}rg and Pietsch, Ullrich and Cassabois, G. and Emiliani, V. and Lienau, C.}, title = {Evidence for strain-induced lateral carrier confinement in InGaAs quantum wells by low-temperature near-field spectroscopy}, year = {2000}, language = {en} } @article{ZeimerBuggeGramlichetal.2001, author = {Zeimer, Ute and Bugge, F. and Gramlich, S. and Smirnitzki, V. and Weyers, Markus and Tr{\"a}nkle, G. and Grenzer, J{\"o}rg and Pietsch, Ullrich and Cassabois, G. and Emiliani, V. and Linau, Christoph}, title = {Evidence of strain-induced lateral carrier confinement in InGaAs-quantum wells by low-temperature near-field spectroscopy}, year = {2001}, language = {en} } @article{PietschGrigorianGrenzeretal.2003, author = {Pietsch, Ullrich and Grigorian, Souren A. and Grenzer, J{\"o}rg and Feranchuk, S. and Zeimer, Ute}, title = {Grazing-incidence diffraction study of strain-modulated single quantum well nanostructures}, year = {2003}, language = {en} } @article{DarowskiPaschkePietschetal.1997, author = {Darowski, Nora and Paschke, K. and Pietsch, Ullrich and Wang, K. H. and Forchel, Alfred and Baumbach, Tilo and Zeimer, Ute}, title = {Identification of a buried single quantum well within surface structurized semiconductors using depth resolved x-ray grazing-incidence diffraction}, year = {1997}, language = {en} } @article{ZeimerBaumbachGrenzeretal.1999, author = {Zeimer, Ute and Baumbach, Tilo and Grenzer, J{\"o}rg and L{\"u}bbert, Daniel and Mazuelas, A. and Pietsch, Ullrich and Erbert, G.}, title = {In-situ characterization of strain distribution in broad-area high-power lasers under operation by high- resolution x-ray diffrcation and topography using synchrotron radiation}, year = {1999}, language = {en} } @article{PietschZeimerGrenzeretal.2003, author = {Pietsch, Ullrich and Zeimer, Ute and Grenzer, J{\"o}rg and Grigorian, Souren A. and Fricke, J. and Gramlich, S. and Bugge, F. and Weyers, Markus and Trankle, G.}, title = {Influence of lateral patterning geometry on lateral carrier confinement in strain-modulated InGaAs- nanostructures}, year = {2003}, language = {en} } @article{ZeimerGrenzerPietschetal.2001, author = {Zeimer, Ute and Grenzer, J{\"o}rg and Pietsch, Ullrich and Bugge, F. and Smirnitzki, V. and Weyers, Markus}, title = {Investigation of strain-modulated InGaAs-nanostructures by grazing-incidence x-ray diffraction and photoluminescence}, year = {2001}, language = {en} }