Zobrazeno 1 - 10
of 255
pro vyhledávání: '"W. W. Rühle"'
Autor:
W. W. Rühle, B. C. Richards, Sangam Chatterjee, Josh Hendrickson, S. Horst, Julian Sweet, Dimitri Litvinov, Hyatt M. Gibbs, Galina Khitrova, Stephan W. Koch, Dagmar Gerthsen, Martin Wegener, Alexej Chernikov
Publikováno v:
Solid State Communications. 149:1485-1492
An ensemble of InAs quantum dots with ground state transition energies centered at 1.216 eV and density 1011dots/cm2 has been studied by time-resolved photoluminescence (PL). The wavelength of the 100-fs excitation pulse was tuned through the ground
Autor:
Wolfgang Stolz, S. W. Koch, W. Diehl, Eckhard Kühn, Angela Thränhardt, S. Horst, Sangam Chatterjee, W. W. Rühle, Peter Brick
Publikováno v:
physica status solidi c. 6:572-575
The influence of an intra-cavity anti-reflection coating on the switch-on dynamics and the power input-output characteristic of a vertical-external-cavity surface-emitting laser (VECSEL) system are investigated. The experiments show a significantly h
Autor:
M. Schwalm, Thomas Waitz, Sangam Chatterjee, Bruno K. Meyer, W. W. Rühle, Stephan Lautenschläger, S. Horst, Michael Tiemann, Alexej Chernikov, Peter J. Klar
Publikováno v:
physica status solidi c. 6:542-545
We report a systematic study of the photoluminescence properties of ZnO nanostructures. In particular, mesoporous ZnO powders of varying surface-to-mass ratio are investigated and compared to a bulk reference. At low temperatures the emission from hi
Autor:
W. W. Rühle, Sangam Chatterjee, Peter J. Klar, Angela Thränhardt, Wolfgang Stolz, C. Bückers, Shane Johnson, Kerstin Volz, S. W. Koch, S. Horst, Yong-Hang Zhang, J. B. Wang, K. Hantke, I. Nemeth
Publikováno v:
physica status solidi c. 6:411-414
Formation of self-organized Ga(AsSb) quantum-islands during growth is shown to occur in a series of Ga(AsSb)/GaAs/(AlGa)As heterostructures, resulting in an in-plane hole confinement of several hundred meV. The shape of the in-plane confinement poten
Autor:
Wolfgang Stolz, K. Hantke, S. D. Baranovskii, Kerstin Volz, W. W. Rühle, P. Thomas, Bernardette Kunert, Oleg Rubel
Publikováno v:
Journal of Luminescence. 127:285-290
An overview of recent experimental and theoretical results on stationary and time-dependent photoluminescence spectra in disordered semiconductor heterostructures is presented. In particular, temperature-dependent peak position and linewidth of the l
Autor:
W. W. Rühle, Kerstin Volz, S. D. Baranovskii, K. Hantke, Wolfgang Stolz, P. Thomas, Oleg Rubel
Publikováno v:
physica status solidi c. 3:2481-2484
We present results of experimental and theoretical studies of thermal quenching of the photoluminescence intensity in (GaIn)(NAs)/GaAs quantum wells after various postgrowth treatments. The experimental data are well described in the framework of a p
Autor:
Wolfgang Stolz, W. W. Rühle, Shinjiroh Hara, Kerstin Volz, M. Leuschner, Peter J. Klar, T. Kurz, Wolfram Heimbrodt, H.-A. Krug von Nidda, Alois Loidl
Publikováno v:
Journal of Magnetism and Magnetic Materials. 301:478-488
We have grown In0.54Ga0.46As:Mn/MnAs granular paramagnetic–ferromagnetic hybrid structures by metal–organic vapor-phase epitaxy. The MnAs clusters have a Curie temperature of about 320 K. We have studied the optical activity of individual ferroma
Autor:
S. D. Baranovskii, Wolfgang Stolz, G. Ebbinghaus, Peter J. Klar, Oleg Rubel, H. Grüning, W. W. Rühle, P. Thomas, Wolfram Heimbrodt, A. Ramakrishnan, Krisztian Kohary
Publikováno v:
physica status solidi (c). 1:109-112
Exciton photoluminescence (PL) in a GaInNAs/GaNAs quantum well was measured in the temperature range from 15 K to 300 K. Two striking features of the PL were observed: the nonmonotoneous temperature dependence of the Stokes shift and the abrupt incre
Autor:
W. W. Rühle, Jens Hübner, Detlef Hommel, John E. Sipe, M. Klude, R. D. R. Bhat, H. M. van Driel
Publikováno v:
physica status solidi (b). 238:548-551
Ballistic currents of spin-polarized carriers are generated by quantum interference of one and two photon absorption. Polarization and relative phase of the exciting femtosecond laser fields control the magnitude and direction of the currents as well
Autor:
S. W. Koch, E. Finger, W. W. Rühle, Torsten Meier, Wolfgang Stolz, Andreas D. Wieck, P. Thomas, C. Sieh
Publikováno v:
physica status solidi (b). 238:537-540
Signatures of exciton and two-exciton states in semiconductor systems are investigated experimentally and theoretically. A set of quantum well samples with different well widths is studied using coherent excitation spectroscopy. The experimental resu