Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Stefan Schmitt-Rink"'
Autor:
Peter Thomas, Stefan Schmitt-Rink, John E. Cunningham, Jagdeep Shah, Karl Leo, Gero von Plessen, Joehen Feldmann
Publikováno v:
Superlattices and Microstructures. 13:55-60
We investigate the dephasing dynamics in semiconductor superlattices using time-resolved four-wave mixing. The signals show a periodic modulation which can be related to Bloch oscillations in the superlattice miniband. The oscillation frequency is st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ee2d8a53076b49703b4c8c1b999f835
https://doi.org/10.1006/spmi.1993.1011
https://doi.org/10.1006/spmi.1993.1011
Publikováno v:
Physical Review B. 45:8185-8188
We apply a recently developed quasiparticle theory for strongly correlated systems to a three-band model of Cu-O planes. We allow for Cu-O hybridization, Cu-O intersite repulsion, and a large on-site repulsion at the Cu sites (which will be treated a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76fa44cfbc16a36d5c1dfcd80ad89ac3
https://doi.org/10.1103/physrevb.45.8185
https://doi.org/10.1103/physrevb.45.8185
Publikováno v:
Physical Review Letters. 68:102-105
We show that far-infrared radiation can be generated in the depletion field near semiconductor surfaces via the inverse Franz-Keldysh effect or electric-field-induced optical rectification. This mechanism is conceptually different from those previous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86bf73cd7626cef978599bcdbb08b21b
https://doi.org/10.1103/physrevlett.68.102
https://doi.org/10.1103/physrevlett.68.102
Publikováno v:
Physical Review B. 43:10882-10889
Les calculs utilisent l'approximation auto-coherente de Born pour l'auto-energie. Pour de petits systemes, on trouve un bon accord avec les etudes de diagonalisation exacte. Dans la limite thermodynamique, le residu de quasiparticule, la masse effect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5f5d766b5b9a717215f27560d28daed
https://doi.org/10.1103/physrevb.43.10882
https://doi.org/10.1103/physrevb.43.10882
Publikováno v:
Modern Physics Letters B. :135-138
Low-temperature emission spectra are calculated for an n-doped semiconductor in which the Fermi level is almost degenerate with an exciton of a higher conduction band. It is shown that in such a sample the virtual transitions of electrons from the Fe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a24f59be38c4a00888a1a69e089cab39
https://doi.org/10.1142/s0217984991000174
https://doi.org/10.1142/s0217984991000174
Autor:
Stefan Schmitt-Rink
Publikováno v:
Festkörperprobleme 31 ISBN: 9783528080396
We discuss experimental and theoretical studies of the evolution of optical properties of semiconductor quantum wells, as the quasi-two-dimensional states are further confined into quasi-zero dimensions by a strong perpendicular magnetic field. We sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6dc38b159b8e5c38c4a1768a275ffbc
https://doi.org/10.1007/bfb0107870
https://doi.org/10.1007/bfb0107870
Publikováno v:
Physical Review B. 42:6850-6852
We reconsider the problem of a single spin flip in the saturated ferromagnetic state (the Nagaoka state) of the infinite-U Hubbard model for a small (but finite) hole concentration. By studying the ground-state energy and the spin-flip spectral funct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b016727980a925ee4b078fca95bd670
https://doi.org/10.1103/physrevb.42.6850
https://doi.org/10.1103/physrevb.42.6850
Publikováno v:
Physical review. B, Condensed matter. 48(15)
A self-consistent solution is presented, which takes into account the k dependence of the subband wave functions under the Hartree-Fock approximation in a modulation-doped quantum well. The solution is then used in a formulation, by solving numerical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2266a2b8fe1803425812d59790f1fdf4
https://pubmed.ncbi.nlm.nih.gov/10007415
https://pubmed.ncbi.nlm.nih.gov/10007415
Publikováno v:
Physical review. B, Condensed matter. 47(3)
We discuss the temporal evolution of transient four-wave-mixing signals in semiconductors. For near-resonant excitation with intense ultrashort optical pulses, we show that even in a homogeneously broadened system, there is no pure free decay of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5ca2bf669eab5cf7b81afc074dbd4a4
https://pubmed.ncbi.nlm.nih.gov/10006127
https://pubmed.ncbi.nlm.nih.gov/10006127
Autor:
Tawee Tanbun-Ek, A. F. J. Levi, James O'Gorman, Stefan Schmitt-Rink, Debbie L. Coblentz, Ralph A. Logan
Publikováno v:
SPIE Proceedings.
For many years it has been assumed that nonradiative recombination plays a dominant role in determining the high temperature performance of long wavelength laser diodes. We show that this view is inconsistent with the measured temperature dependence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9176944e409344e44a34e677629dfba1
https://doi.org/10.1117/12.60480
https://doi.org/10.1117/12.60480