@inproceedings{39917, author = {{Hilleringmann, Ulrich and Adams, S and Goser, K}}, booktitle = {{Proceedings ISSSE’92}}, pages = {{304–307}}, title = {{{A Silicon Technology for Monolithic Integration of Optical Waveguides, Photodetectors and VLSI CMOS Circuits}}}, year = {{1992}}, } @inproceedings{39918, author = {{Adams, S and Hilleringmann, Ulrich and Goser, K}}, booktitle = {{EFOC LAN}}, pages = {{92–92}}, title = {{{Electrooptical coupling of waveguides and VLSI circuits integrated on one silicon chip}}}, year = {{1992}}, } @article{43483, author = {{Schroeter-Wittke, Harald}}, journal = {{Der Evangelische Erzieher}}, pages = {{426--431}}, title = {{{Michel plays Petrucciani. Oder: "So wenig sind wir auf uns selbst gestellt." Oder: Praktisch-theologische Wahr-Nehmungen in dem "Spielraum von Schnitten"}}}, volume = {{44}}, year = {{1992}}, } @inproceedings{44291, abstract = {{Summary form only given. The numerical investigations are based on a microscopic many-body theory which allows one to compute the linear and nonlinear optical properties of semiconductor superlattices in the presence of homogeneous electric fields applied in the growth direction. The THz-emission due to the field-driven dynamics of photoexcited carriers is investigated for the combined action of static and alternating fields. For a driving field it was shown within a simple model that the equations governing the intraband dynamics in the field-driven superlattice should be analogous to the ones describing the superconducting Josephson junction. The transport properties in this regime can be described by the picture of multi-photon-assisted tunneling between Wannier-Stark states.}}, author = {{Meier, Torsten and Thomas, P. and Koch, S.W.}}, booktitle = {{Technical Digest. Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference}}, isbn = {{1-55752-576-X}}, location = {{Baltimore, MD, USA}}, pages = {{218--219}}, publisher = {{IEEE}}, title = {{{THz-emission from photoexcited semiconductor superlattices with applied ac and dc electric fields}}}, doi = {{10.1109/QELS.1999.807564}}, year = {{1992}}, } @inproceedings{44292, abstract = {{Summary form only given. Partly non-degenerate four-wave mixing is able to detect coherent coupling between excitonic resonances like e.g. light-hole and heavy-hole excitons or between an exciton and its continuum states. We apply an extension of this method, which we call selective coherent spectroscopy (SCS), to symmetrically strained (GaIn)As/Ga(PAs) multiple quantum-wells. The samples are excited simultaneously by a picosecond pulse with wavevector k/sub 1/ and a 100 fs pulse with wavevector k/sub 2/. The central wavelength of the picosecond pulse is scanned over the entire spectrum of the 100 fs pulse and the four-wave mixing signal in the direction 2k/sub 2/-k/sub 1/ is detected at a fixed energy. This scan provides an SCS spectrum.}}, author = {{Meier, Torsten and Euteneuer, A. and Finger, E. and Hofmann, M. and Stolz, W. and Thomas, P. and Koch, S.W. and Ruhle, W.W.}}, booktitle = {{Technical Digest. Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference}}, location = {{Baltimore, MD, USA}}, pages = {{204}}, publisher = {{IEEE}}, title = {{{Distribution of exciton binding-energies in disordered semiconductor quantum-wells}}}, doi = {{10.1109/QELS.1999.807538}}, year = {{1992}}, } @inproceedings{44290, abstract = {{Summary form only given. For a proper understanding of nonlinear optical experiments in semiconductors even the low-density limit Coulomb-induced many body correlations beyond the Hartree-Fock decoupling scheme need to be considered. In the coherent X(3) limit these correlations manifest themselves in the contributions of bound and unbound two-exciton states to the optical response. The understanding of nonlinear excitonic effects in the Stark effect of semiconductors including carrier-correlations is still of fundamental interest.}}, author = {{Meier, Torsten and Sieh, C. and Koch, S.W. and Brick, P. and Hubner, M. and Ell, C. and Prineas, J. and Khitrova, G. and Gibbs, H.M.}}, booktitle = {{Technical Digest. Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference}}, isbn = {{1-55752-576-X}}, location = {{Baltimore, MD, USA}}, pages = {{14--15}}, publisher = {{IEEE}}, title = {{{Influence of carrier-correlations on the optical Stark effect of semiconductors}}}, doi = {{10.1109/QELS.1999.807099}}, year = {{1992}}, } @inproceedings{44289, abstract = {{Recent experiments by Roskos et al. in ultrashort optical pulse excitation of biased coupled quantum wells have shown remarkable generation of terahertz electromagnetic radiation. Two different effects were identified: (i) an oscillatory field of frequency corresponding to the separation between the coupled levels in the quantum-well pair (~ 1.5 THz); and (ii) an “instantaneous” electromagnetic field pulse that appears to follow the time evolution of the exciting laser pulse. The oscillatory field is understood to be caused by the coherent oscillation of optically created electrons from one well to the other.[1] The “instantaneous” part we believe is caused by a new mechanism proposed in Ref. 2. The essence of this “instantaneous” mechanism is that electron-hole pairs are created in a biased semiconductor with a net polarization. The density of these pairs follows the light field, as does the induced polarization, hence, generating an electromagnetic source that follows the light pulse. Such mechanisms have been discussed before for photon energies below the optical bandgap energy,[3] although they have so far been difficult to observe. In our work, we have generalized and extended such effects to photon energies above the handgap energy. In this paper we will discuss both of these mechanisms as well as the fourwave-mixing (FWM) signal,[4] and show how they can be understood within one unified formalism. We will also show that the calculations agree well with the experimental results.}}, author = {{Meier, Torsten and Schulze, A. and Scmittrink, S. and Thomas, P. and Chuang, S.L.}}, booktitle = {{International Quantum Electronics Conference}}, location = {{Vienna, Austria}}, title = {{{Terahertz Electromagnetic Pulse Generation and Four-Wave Mixing in Coupled Quantum Wells}}}, year = {{1992}}, } @inproceedings{44288, abstract = {{In the presence of a homogeneous electric field, 𝐹→, each Bloch state in a crystal changes quasimomentum according to the so-called acceleration theorem Thus, in the absence of interband tunneling and scattering processes, each Bloch state moves at a constant velocity in k-space and executes a periodic motion in the reduced zone scheme by undergoing a Bragg reflection between each two traversals of the Brillouin zone.}}, author = {{Meier, Torsten and von Plessen, G. and Schulze, A. and Thomas, P.}}, booktitle = {{International Quantum Electronics Conference}}, location = {{Vienna, Austria}}, title = {{{On the Observability of Bloch Oscillations in Time-Resolved Four-Wave-Mixing}}}, year = {{1992}}, } @misc{45259, author = {{Herzig, Bardo}}, publisher = {{Universität Paderborn}}, title = {{{Entwurf einer Benutzeroberfläche für die Analyse von kontextfreien und DCG - Grammatiken und ihre didaktische Verwendung. Erste Staatsarbeit im Fach Informatik}}}, year = {{1992}}, } @inproceedings{47608, author = {{Jonas-Ahrend, Gabriela}}, location = {{San Francisco/USA}}, title = {{{Physics Education in East and West Germany}}}, year = {{1992}}, } @inbook{19432, author = {{Eke, Norbert Otto}}, booktitle = {{Die Fürstliche Bibliothek Corvey. Ihre Bedeutung für eine neue Sicht der Literatur des frühen 19. Jahrhunderts. Beiträge des 1. Internationalen Corvey-Symposions. 25.-27. Oktober 1990 in Paderborn}}, editor = {{Schöwerling, Rainer and Steinecke, Hartmut and Eke, Norbert Otto and Tiggesbäumker, Günter}}, pages = {{87--103}}, publisher = {{Fink}}, title = {{{„Wie wird künftig Meusel die hungrige Nachwelt hetzen und peinigen“. Deutsche Romane 1815-1830 in der Fürstlichen Bibliothek Corvey. Vorläufiges zum Forschungsprojekt „Der deutsche Roman 1815-1830"}}}, year = {{1992}}, } @inbook{19488, abstract = {{Angaben zur Herausgeberschaft: Hg. von Rainer Schöwerling und Hartmut Steinecke unter Mitarbeit von Norbert Otto Eke und Günter Tiggesbäumker}}, author = {{Eke, Norbert Otto}}, booktitle = {{Die Fürstliche Bibliothek Corvey. Ihre Bedeutung für eine neue Sicht der Literatur des frühen 19. Jahrhunderts. Beiträge des 1. Internationalen Corvey-Symposions. 25.-27. Oktober 1990 in Paderborn}}, editor = {{Schöwerling, Rainer and Steinecke, Hartmut and Eke, Norbert Otto and Tiggesbäumker, Günter}}, pages = {{174--181, 319--321, 398--404}}, title = {{{Diskussionsberichte zu den Sektionen 2 („Roman“) und 3 („Dramen“) sowie der Abschlußdiskussion des 1. Internationalen Corvey-Symposions}}}, year = {{1992}}, } @book{19091, abstract = {{Präzisierung der Herausgeberschaft: Hg. von Rainer Schöwerling und Hartmut Steinecke unter Mitarbeit von Norbert Otto Eke und Günter Tiggesbäumker}}, editor = {{Schöwerling, Rainer and Steinecke, Hartmut and Eke, Norbert Otto and Tiggesbäumker, Günter}}, pages = {{439}}, publisher = {{Fink}}, title = {{{Die Fürstliche Bibliothek Corvey. Ihre Bedeutung für eine neue Sicht der Literatur des frühen 19. Jahrhunderts. Beiträge des 1. Internationalen Corvey-Symposions. 25.-27. Oktober 1990 in Paderborn}}}, year = {{1992}}, } @misc{51585, author = {{Hilgert, Joachim}}, booktitle = {{JBer. DMV}}, title = {{{Fomenko, A.T. Symplectic Geometry (Gordon and Breach, 1988)}}}, volume = {{94}}, year = {{1992}}, } @article{51442, author = {{Hilgert, Joachim and Ólafsson, G.}}, journal = {{Japan. J. Math.}}, pages = {{213--290}}, title = {{{Analytic Extensions of Representations, the Solvable Case}}}, volume = {{18}}, year = {{1992}}, } @article{51443, author = {{Hilgert, Joachim}}, journal = {{Math. Zeitschrift}}, pages = {{463--466}}, title = {{{Controllability on Real Reductive Groups}}}, volume = {{209}}, year = {{1992}}, } @article{19814, author = {{Flögel, A. and Kleine Büning, H. and Lettmann, Theodor}}, issn = {{0988-3754}}, journal = {{RAIRO - Theoretical Informatics and Applications}}, pages = {{327--340}}, title = {{{On the restricted equivalence for subclasses of propositional logic}}}, doi = {{10.1051/ita/1993270403271}}, year = {{1993}}, } @techreport{2453, author = {{Simon, Jens}}, publisher = {{Paderborn Center for Parallel Computing}}, title = {{{Benutzung virtueller Topologien unter PARIX}}}, year = {{1993}}, } @techreport{2454, author = {{Röttger, Markus and Simon, Jens and Schroeder, Ulf-Peter}}, publisher = {{Paderborn Center for Parallel Computing}}, title = {{{Virtual Topology Library for PARIX}}}, year = {{1993}}, } @techreport{2455, author = {{Diekmann, Ralf and Lüling, Reinhard and Simon, Jens}}, publisher = {{Paderborn Center for Parallel Computing}}, title = {{{Problem Independent Distributed Simulated Annealing and its Applications}}}, year = {{1993}}, }