@article{39997,
author = {{Benning, S. and Kitzerow, Heinz-Siegfried and Bock, H. and Achard, M.-F.}},
issn = {{0267-8292}},
journal = {{Liquid Crystals}},
keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}},
number = {{7}},
pages = {{901--906}},
publisher = {{Informa UK Limited}},
title = {{{Fluorescent columnar liquid crystalline 3,4,9,10-tetra-(n-alkoxycarbonyl)-perylenes}}},
doi = {{10.1080/02678290050043842}},
volume = {{27}},
year = {{2002}},
}
@article{39992,
author = {{Popova, Elena L. and Rozenberg, Valeria I. and Starikova, Zoya A. and Keuker-Baumann, Susanne and Kitzerow, Heinz-Siegfried and Hopf, Henning}},
issn = {{1433-7851}},
journal = {{Angewandte Chemie International Edition}},
keywords = {{General Chemistry, Catalysis}},
number = {{18}},
pages = {{3411--3414}},
publisher = {{Wiley}},
title = {{{Thermotropic Liquid Crystals from Planar Chiral Compounds: Optically Active Mesogenic [2.2]Paracyclophane Derivatives}}},
doi = {{10.1002/1521-3773(20020916)41:18<3411::aid-anie3411>3.0.co;2-a}},
volume = {{41}},
year = {{2002}},
}
@article{39996,
author = {{Keuker-Baumann, Susanne and Bock, Harald and Sala, Fabio Della and Benning, Stephan A. and Haßheider, Thomas and Frauenheim, Thomas and Kitzerow, Heinz-Siegfried}},
issn = {{0267-8292}},
journal = {{Liquid Crystals}},
keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}},
number = {{7}},
pages = {{1105--1113}},
publisher = {{Informa UK Limited}},
title = {{{Absorption and luminescence spectra of electroluminescent liquid crystals with triphenylene, pyrene and perylene units}}},
doi = {{10.1080/02678290110048732}},
volume = {{28}},
year = {{2002}},
}
@article{38021,
author = {{Christoffers, Jens and Werner, Thomas}},
issn = {{0936-5214}},
journal = {{Synlett}},
keywords = {{Organic Chemistry}},
number = {{01}},
pages = {{0119--0121}},
publisher = {{Georg Thieme Verlag KG}},
title = {{{Cerium-catalyzed α-Oxidation of β-Dicarbonyl Compounds with Molecular Oxygen}}},
doi = {{10.1055/s-2002-19331}},
volume = {{2002}},
year = {{2002}},
}
@inproceedings{39991,
author = {{Kitzerow, Heinz-Siegfried and Hoischen, A. and Merstens, G. and Paelke, L. and Röder, T. and Stich, N. and Strauß, J.}},
location = {{Boston, MA, USA}},
number = {{2}},
pages = {{534--535}},
publisher = {{American Chemical Society}},
title = {{{Liquid Crystal / Polymer Composites: From Polymer-Dispersed Liquid Crystals to Tunable Photonic Crystals}}},
volume = {{43}},
year = {{2002}},
}
@article{41307,
abstract = {{We have applied nuclear inelastic absorption (NIA) to the molecular glass former dibutylphthalate/ferrocene, both in bulk and in nanoporous matrices having pore sizes of 50 and 25 A, respectively. The quantity g(E)/E2, where g(E) is the vibrational phonon density of states (VDOS) of the resonant nuclei, exhibits a pronounced maximum at low energies. Confinement in pores leads to a suppression of the VDOS below 1.5 meV, independent of the pore size. Also in the scaled heat capacity C(T)/T3, we observe a decrease of the peak maximum for low temperatures. Our observations are discussed in the light of experimental and theoretical results on nanocrystals and a recent theoretical model for the boson peak.}},
author = {{Asthalter, T. and Bauer, Matthias and van Buerck, U. and Sergueev, I. and Franz, H. and Chumakov, A. I.}},
journal = {{Hyperfine Interactions}},
number = {{12}},
pages = {{77--83}},
title = {{{Phonons in Confinement and the Boson Peak Using Nuclear Inelastic Absorption}}},
doi = {{10.1023/A:1025434512268}},
volume = {{43}},
year = {{2002}},
}
@article{37680,
author = {{Silberhorn, Ch. and Korolkova, N. and Leuchs, G.}},
issn = {{0031-9007}},
journal = {{Physical Review Letters}},
keywords = {{General Physics and Astronomy}},
number = {{16}},
publisher = {{American Physical Society (APS)}},
title = {{{Quantum Key Distribution with Bright Entangled Beams}}},
doi = {{10.1103/physrevlett.88.167902}},
volume = {{88}},
year = {{2002}},
}
@article{42039,
author = {{Schweins, R. and Huber, Klaus}},
issn = {{1292-8941}},
journal = {{The European Physical Journal E}},
keywords = {{Surfaces and Interfaces, General Materials Science, General Chemistry, Biophysics, Biotechnology}},
number = {{1}},
pages = {{117--126}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Collapse of sodium polyacrylate chains in calcium salt solutions}}},
doi = {{10.1007/s101890170093}},
volume = {{5}},
year = {{2002}},
}
@article{42040,
author = {{Neumann, Bernd and Huber, Klaus and Pollmann, Peter}},
issn = {{1463-9076}},
journal = {{Physical Chemistry Chemical Physics}},
keywords = {{Physical and Theoretical Chemistry, General Physics and Astronomy}},
number = {{16}},
pages = {{3687--3695}},
publisher = {{Royal Society of Chemistry (RSC)}},
title = {{{A comparative experimental study of the aggregation of Acid Red 266 in aqueous solution by use of 19F-NMR, UV/Vis spectroscopy and static light scattering}}},
doi = {{10.1039/b004172f}},
volume = {{2}},
year = {{2002}},
}
@article{42053,
author = {{Ikeda, Yuko and Beer, Michael and Schmidt, Manfred and Huber, Klaus}},
issn = {{0024-9297}},
journal = {{Macromolecules}},
keywords = {{Materials Chemistry, Inorganic Chemistry, Polymers and Plastics, Organic Chemistry}},
number = {{3}},
pages = {{728--733}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Ca2+ and Cu2+ Induced Conformational Changes of Sodium Polymethacrylate in Dilute Aqueous Solution}}},
doi = {{10.1021/ma970540p}},
volume = {{31}},
year = {{2002}},
}
@article{42052,
author = {{Katzenstein, Armin and Huber, Klaus}},
issn = {{0743-7463}},
journal = {{Langmuir}},
keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}},
number = {{18}},
pages = {{7049--7056}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Model of Polydisperse Wormlike Stars and Its Application to Dyestuff Aggregates}}},
doi = {{10.1021/la020143u}},
volume = {{18}},
year = {{2002}},
}
@article{39778,
author = {{Mertens, Guido and Röder, Thorsten and Schweins, Ralf and Huber, Klaus and Kitzerow, Heinz-Siegfried}},
issn = {{0003-6951}},
journal = {{Applied Physics Letters}},
keywords = {{Physics and Astronomy (miscellaneous)}},
number = {{11}},
pages = {{1885--1887}},
publisher = {{AIP Publishing}},
title = {{{Shift of the photonic band gap in two photonic crystal/liquid crystal composites}}},
doi = {{10.1063/1.1461885}},
volume = {{80}},
year = {{2002}},
}
@article{43294,
abstract = {{The quantum dynamics of an ensemble of interacting electrons in an array of random scatterers is treated using a numerical approach for the calculation of average values of quantum operators and time correlation functions in the Wigner representation. The Fourier transform of the product of matrix elements of the dynamic propagators obeys an integral Wigner-Liouville-type equation. Initial conditions for this equation are given by the Fourier transform of the Wiener path-integral representation of the matrix elements of the propagators at the chosen initial times. This approach combines both molecular dynamics and Monte Carlo methods and computes numerical traces and spectra of the relevant dynamical quantities such as momentum-momentum correlation functions and spatial dispersions. Considering, as an application, a system with fixed scatterers, the results clearly demonstrate that the many-particle interaction between the electrons leads to an enhancement of the conductivity and spatial dispersion compared to the noninteracting case.}},
author = {{Meier, Torsten and Filinov, V. and Thomas, P. and Varga, I. and Bonitz, M. and Fortov, V. and Koch, S.W.}},
journal = {{Physical Review B}},
number = {{16}},
publisher = {{American Physical Society}},
title = {{{Interacting electrons in a one-dimensional random array of scatterers: A quantum dynamics and Monte Carlo study}}},
doi = {{10.1103/PhysRevB.65.165124}},
volume = {{65}},
year = {{2002}},
}
@article{43295,
abstract = {{The influence of coherent photoexcited excitons on the absorption spectra and the Four Wave Mixing response of ZnSe/ZnMgSSe quantum wells is investigated for various polarization configurations. For purely resonant excitation at the heavy-hole-exciton a blue shift and an increasing homogeneous line width of the exciton absorption peak is found. The clear and stable blue shift shows a linear dependence on excitation fluence both in experiment and theory with different slopes for the different pump and probe polarization configurations. The equivalence of pump and probe, and Four Wave Mixing results is shown experimentally.}},
author = {{Meier, Torsten and Wachter, S. and Maute, M. and Kalt, H. and Galbraith, I. and Sieh, C. and Koch, S.W.}},
journal = {{Physica B: Condensed Matter}},
number = {{1-4}},
pages = {{309--313}},
publisher = {{North-Holland}},
title = {{{Excitation induced shift and broadening of the exciton resonance}}},
doi = {{10.1016/S0921-4526(01)01400-4}},
volume = {{314}},
year = {{2002}},
}
@article{43292,
abstract = {{Physicists have realized during the last two decades that the physical properties of many condensed-matter systems are often best described in terms of lumps of charge, known as quasiparticles, rather than by electrons and ions. In a crystal under equlibrium conditions, for example, the mutual repulsion of the electrons leads to a cloud of positive charge surrounding each individual electron. This "dressing" of electrons leads to charge screening. In other words, a test charge placed far from an electron will feel the influence of a new entity with a smaller charge, rather than the charge on the "bare" electron.}},
author = {{Meier, Torsten and Koch, S.W.}},
journal = {{Physics World}},
number = {{2}},
pages = {{24--25}},
publisher = {{IOP Publishing}},
title = {{{Particles get all dressed up}}},
doi = {{10.1088/2058-7058/15/2/36}},
volume = {{15}},
year = {{2002}},
}
@article{43291,
abstract = {{On the basis of a tight-binding model for a strongly disordered semiconductor with correlated conduction- and valence-band disorder a coherent dynamical intraband effect is analyzed. For systems that are excited by two specially designed ultrashort light-pulse sequences delayed by
τ
relatively to each other echolike phenomena are predicted to occur. In addition to the interband photon echo which shows up at exactly t=2τ relative to the first pulse, the system responds with two spontaneous intraband current pulses preceding and following the appearance of the photon echo. The temporal splitting depends on the electron-hole mass ratio. Calculating the population relaxation rate due to Coulomb scattering, it is concluded that the predicted new dynamical effect should be experimentally observable in an interacting and strongly disordered system, such as the Quantum Coulomb Glass.}},
author = {{Meier, Torsten and Schlichenmaier, C. and Varga, I. and Thomas, P. and Koch, S.W.}},
journal = {{Physical Review B}},
number = {{8}},
publisher = {{American Physical Society}},
title = {{{Optically induced coherent intraband dynamics in disordered semiconductors}}},
doi = {{10.1103/PhysRevB.65.085306}},
volume = {{65}},
year = {{2002}},
}
@inproceedings{44127,
abstract = {{A microscopic theory for optical semiconductor nonlinearities systematically including Coulomb correlation effects is able to explain AC Stark shifts measured with all possible pump/probe circular polarizations and gives evidence for a 3-level-atom-like intervalence band coherence.}},
author = {{Meier, Torsten and Gibbs, H.M. and Khitrova, G. and Ell, C. and Binder, R. and Hoyer, W. and Kira, M. and Koch, S.W. and Sieh, C.}},
booktitle = {{Nonlinear Optics: Materials, Fundamentals and Applications}},
isbn = {{1-55752-721-0}},
location = {{Wailea, Maui, Hawaii United States}},
publisher = {{Optical Society of America}},
title = {{{Higher-Order Correlations and Semiconductor Optical Nonlinearities}}},
doi = {{10.1364/NLO.2002.WA1}},
year = {{2002}},
}
@article{43293,
abstract = {{We present a derivation of Förster coupling between two quantum dots by solving the equation of motion for the material excitation simultaneously with Maxwells equations. This allows us to identify the Förster process with the short-range contribution of the coupling that is mediated by the total electric field. The dependence of the coupling on the distance R of the dots is ∝ R—3, i.e. the rates follow the well-known R—6 behaviour. For distances between the sites longer than a quarter of the wavelength of light there is a cross-over to coupling due to the retarded light field, which is ∝ R—1, i.e. the rates are ∝ R—2.}},
author = {{Meier, Torsten and Thomas, P. and Möller, M. and Eichmann, R. and Stroucken, T. and Knorr, A.}},
journal = {{physica status solidi (b)}},
number = {{1}},
pages = {{25--29}},
publisher = {{WILEY‐VCH Verlag Berlin GmbH}},
title = {{{Microscopic Foundation of the Förster Excitonic Energy Transfer Process}}},
doi = {{10.1002/1521-3951(200203)230:1<25::AID-PSSB25>3.0.CO;2-8}},
volume = {{230}},
year = {{2002}},
}
@article{25998,
abstract = {{The formation of mesoscopically ordered silica/surfactant composites under acidic synthesis conditions is studied by time-resolved in-situ small-angle X-ray scattering (SAXS) using synchrotron radiation. Benzene is used a an additive which acts as a weak swelling agent although most of the benzene molecules are found to reside near the surfactant/silicate interface region rather than in the micelle cores. With increasing relative amounts of benzene, the curvature of the micellar aggregates decreases, which finally leads to a transition from (hexagonally) rodlike to lamellar; a mechanism for this change in curvature is suggested.}},
author = {{Tiemann, Michael and Goletto, Valérie and Blum, Raphaël and Babonneau, Florence and Amenitsch, Heinz and Lindén, Mika}},
issn = {{0743-7463}},
journal = {{Langmuir}},
pages = {{10053--10057}},
title = {{{In-Situ SAXS Studies on the Formation of Silicate/Surfactant Mesophases with Solubilized Benzene under Acidic Conditions}}},
doi = {{10.1021/la026473w}},
year = {{2002}},
}
@article{26001,
abstract = {{Mesoporous aluminophosphates with a strict ratio of Al∶P = 1∶1 have been synthesised from a single-source molecular precursor.}},
author = {{Tiemann, Michael and Fröba, Michael}},
issn = {{1359-7345}},
journal = {{Chemical Communications}},
pages = {{406--407}},
title = {{{Mesoporous aluminophosphates from a single-source precursor}}},
doi = {{10.1039/b110662g}},
year = {{2002}},
}