@article{39700, author = {{Mirzaei, Javad and Urbanski, Martin and Kitzerow, Heinz-Siegfried and Hegmann, Torsten}}, issn = {{1439-4235}}, journal = {{ChemPhysChem}}, keywords = {{Physical and Theoretical Chemistry, Atomic and Molecular Physics, and Optics}}, number = {{7}}, pages = {{1381--1394}}, publisher = {{Wiley}}, title = {{{Synthesis of Liquid Crystal Silane-Functionalized Gold Nanoparticles and Their Effects on the Optical and Electro-Optic Properties of a Structurally Related Nematic Liquid Crystal}}}, doi = {{10.1002/cphc.201301052}}, volume = {{15}}, year = {{2014}}, } @article{39699, author = {{Urbanski, Martin and Mirzaei, Javad and Hegmann, Torsten and Kitzerow, Heinz-Siegfried}}, issn = {{1439-4235}}, journal = {{ChemPhysChem}}, keywords = {{Physical and Theoretical Chemistry, Atomic and Molecular Physics, and Optics}}, number = {{7}}, pages = {{1395--1404}}, publisher = {{Wiley}}, title = {{{Nanoparticle Doping in Nematic Liquid Crystals: Distinction between Surface and Bulk Effects by Numerical Simulations}}}, doi = {{10.1002/cphc.201301054}}, volume = {{15}}, year = {{2014}}, } @article{39713, author = {{McGinn, Christine K. and Laderman, Laura I. and Zimmermann, Natalie and Kitzerow, Heinz-Siegfried and Collings, Peter J.}}, issn = {{1539-3755}}, journal = {{Physical Review E}}, keywords = {{Industrial and Manufacturing Engineering, Metals and Alloys, Strategy and Management, Mechanical Engineering}}, number = {{6}}, publisher = {{American Physical Society (APS)}}, title = {{{Planar anchoring strength and pitch measurements in achiral and chiral chromonic liquid crystals using 90-degree twist cells}}}, doi = {{10.1103/physreve.88.062513}}, volume = {{88}}, year = {{2014}}, } @article{39970, author = {{Kitzerow, Heinz-Siegfried}}, issn = {{1358-314X}}, journal = {{Liquid Crystals Today}}, keywords = {{Materials Chemistry, Inorganic Chemistry, Condensed Matter Physics}}, number = {{1}}, pages = {{25--27}}, publisher = {{Informa UK Limited}}, title = {{{Alfred Saupe Prize 2013 Laudatio for Prof. Dr Gerd Heppke*}}}, doi = {{10.1080/1358314x.2014.890797}}, volume = {{23}}, year = {{2014}}, } @article{39691, author = {{Wahle, Markus and Kitzerow, Heinz-Siegfried}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, keywords = {{Atomic and Molecular Physics, and Optics}}, number = {{16}}, publisher = {{The Optical Society}}, title = {{{Measurement of group velocity dispersion in a solid-core photonic crystal fiber filled with a nematic liquid crystal}}}, doi = {{10.1364/ol.39.004816}}, volume = {{39}}, year = {{2014}}, } @article{39705, author = {{Wahle, M. and Kitzerow, Heinz-Siegfried}}, issn = {{1094-4087}}, journal = {{Optics Express}}, keywords = {{Atomic and Molecular Physics, and Optics}}, number = {{1}}, publisher = {{The Optical Society}}, title = {{{Liquid crystal assisted optical fibres}}}, doi = {{10.1364/oe.22.000262}}, volume = {{22}}, year = {{2014}}, } @inproceedings{39709, author = {{Atorf, B. and Muhlenbernd, H. and Zentgraf, Thomas and Kitzerow, Heinz-Siegfried}}, booktitle = {{2013 7th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics}}, publisher = {{IEEE}}, title = {{{Tunable infrared resonance spectra of split ring resonators embedded in a liquid crystal}}}, doi = {{10.1109/metamaterials.2013.6808995}}, year = {{2014}}, } @inbook{39702, author = {{Kitzerow, Heinz-Siegfried}}, booktitle = {{Handbook of Liquid Crystals}}, editor = {{Goodby, J. W. and Collings, P. J. and Gleeson, H. and Kato, T. and Raynes, P. and Tschierske, C.}}, pages = {{373--426}}, publisher = {{Wiley-VCH}}, title = {{{Photonic Micro- and Nanostructures, Metamaterials}}}, volume = {{Vol. 8}}, year = {{2014}}, } @article{38088, author = {{Shayovitz, Dror and Herrmann, Harald and Sohler, Wolfgang and Ricken, Raimund and Silberhorn, Christine and Marom, Dan M.}}, issn = {{1094-4087}}, journal = {{Optics Express}}, keywords = {{Atomic and Molecular Physics, and Optics}}, number = {{25}}, publisher = {{The Optical Society}}, title = {{{Real-time coherent detection of phase modulated ultrashort pulses after time-to-space conversion and spatial demultiplexing}}}, doi = {{10.1364/oe.22.031138}}, volume = {{22}}, year = {{2014}}, } @article{22957, abstract = {{We show, by means of numerical and analytical methods, that media with a repulsive nonlinearity which grows from the center to the periphery support a remarkable variety of previously unknown complex stationary and dynamical three-dimensional (3D) solitary-wave states. Peanut-shaped modulation profiles give rise to vertically symmetric and antisymmetric vortex states, and novel stationary hybrid states, built of top and bottom vortices with opposite topological charges, as well as robust dynamical hybrids, which feature stable precession of a vortex on top of a zero-vorticity soliton. The analysis reveals stability regions for symmetric, antisymmetric, and hybrid states. In addition, bead-shaped modulation profiles give rise to the first example of exact analytical solutions for stable 3D vortex solitons. The predicted states may be realized in media with a controllable cubic nonlinearity, such as Bose–Einstein condensates.}}, author = {{Driben, Rodislav and Kartashov, Yaroslav V. and Malomed, Boris A. and Meier, Torsten and Torner, Lluis}}, issn = {{1367-2630}}, journal = {{New Journal of Physics}}, title = {{{Three-dimensional hybrid vortex solitons}}}, doi = {{10.1088/1367-2630/16/6/063035}}, volume = {{16}}, year = {{2014}}, } @article{22956, abstract = {{Parametric down-conversion (PDC) forms one of the basic building blocks for quantum optical experiments. However, the intrinsic multimode spectral-temporal structure of pulsed PDC often poses a severe hindrance for the direct implementation of the heralding of pure single-photon states or, for example, continuous-variable entanglement distillation experiments. To get rid of multimode effects narrowband frequency filtering is frequently applied to achieve a single-mode behavior. A rigorous theoretical description to accurately describe the effects of filtering on PDC, however, is still missing. To date, the theoretical models of filtered PDC are rooted in the discrete-variable domain and only account for filtering in the low-gain regime, where only a few photon pairs are emitted at any single point in time. In this paper we extend these theoretical descriptions and put forward a simple model, which is able to accurately describe the effects of filtering on PDC in the continuous-variable domain. This developed straightforward theoretical framework enables us to accurately quantify the tradeoff between suppression of higher-order modes, reduced purity, and lowered Einstein–Podolsky–Rosen entanglement, when narrowband filters are applied to multimode type-II PDC.}}, author = {{Christ, Andreas and Lupo, Cosmo and Reichelt, Matthias and Meier, Torsten and Silberhorn, Christine}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, number = {{2}}, title = {{{Theory of filtered type-II parametric down-conversion in the continuous-variable domain: Quantifying the impacts of filtering}}}, doi = {{10.1103/physreva.90.023823}}, volume = {{90}}, year = {{2014}}, } @article{22955, abstract = {{The dynamics of 3D Airy-vortex wave packets is studied under the action of strong self-focusing Kerr nonlinearity. Emissions of nonlinear 3D waves out of the main wave packets with the topological charges were demonstrated. Because of the conservation of the total angular momentum, charges of the emitted waves are equal to those carried by the parental light structure. The rapid collapse imposes a severe limitation on the propagation of multidimensional waves in Kerr media. However, the structure of the Airy beam carrier allows the coupling of light from the leading, most intense peak into neighboring peaks and consequently strongly postpones the collapse. The dependence of the critical input amplitude for the appearance of a fast collapse on the beam width is studied for wave packets with zero and nonzero topological charges. Wave packets carrying angular momentum are found to be much more resistant to the rapid collapse.}}, author = {{Driben, Rodislav and Meier, Torsten}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, number = {{19}}, pages = {{5539--5542}}, title = {{{Nonlinear dynamics of Airy-vortex 3D wave packets: emission of vortex light waves}}}, doi = {{10.1364/ol.39.005539}}, volume = {{39}}, year = {{2014}}, } @article{22954, abstract = {{The dynamics of two component-coupled vectorial Airy beams is investigated. In the linear propagation regime, a complete analytic solution describes the breather-like propagation of two components that feature nondiffracting self-accelerating Airy behavior. The superposition of two beams with different input properties opens the possibility of designing more complex nondiffracting propagation scenarios. In the strongly nonlinear regime, the dynamics remain qualitatively robust as is revealed by direct numerical simulations. Because of the Kerr effect, the two beams emit solitonic breathers whose coupling period is compatible with the remaining Airy-like beams. The results of this study are relevant for the description of photonic and plasmonic beams that propagate in coupled planar waveguides, as well as for birefrigent or multiwavelength beams.}}, author = {{Driben, R. and Konotop, V. V. and Meier, Torsten}}, issn = {{0146-9592}}, journal = {{Optics Letters}}, number = {{19}}, pages = {{5523--5526}}, title = {{{Coupled Airy breathers}}}, doi = {{10.1364/ol.39.005523}}, volume = {{39}}, year = {{2014}}, } @inproceedings{3939, abstract = {{Optical and infrared antennas provide a promising way to couple photons in and out of nanoscale structures. As counterpart to conventional radio antennas, they are able to increase optical felds in sub-wavelength volumes, to enhance excitation and emission of quantum emitters or to direct light, radiated by quantum emitters. The directed emission of these antennas has been mainly pursued by surface plasmon based devices, e.g. Yagi-Uda like antennas, which are rather complicated due to the coupling of several metallic particles. Also, like all metallic structures in optical or infrared regime, these devices are very sensitive to fabrication tolerances and are affected by strong losses. It has been shown recently, that such directed emission can be accomplished by dielectric materials as well. In this paper we present an optimization of nanoscopic antennas in the near infrared regime starting from a metallic Yagi-Uda structure. The optimization is done via a particle-swarm algorithm, using full time domain finite integration simulations to obtain the characteristics of the investigated structure, also taking into account substrates. Furthermore we present a dielectric antenna, which performs even better, due to the lack of losses by an appropriate choice of the dielectric material. These antennas are robust concerning fabrication tolerances and can be realized with different materials for both the antenna and the substrate, without using high index materials.}}, author = {{Hildebrandt, Andre and Reichelt, Matthias and Meier, Torsten and Förstner, Jens}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XVIII}}, editor = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Song, Jin-Joo and Tsen, Kong-Thon}}, keywords = {{tet_topic_opticalantenna}}, pages = {{89841G--8941G--6}}, publisher = {{SPIE}}, title = {{{Engineering plasmonic and dielectric directional nanoantennas}}}, doi = {{10.1117/12.2036588}}, volume = {{8984}}, year = {{2014}}, } @article{22958, abstract = {{Dispersion management of periodically alternating fiber sections with opposite signs of two leading dispersion terms is applied for the regeneration of self-accelerating truncated Airy pulses. It is demonstrated that for such a dispersion management scheme, the direction of the acceleration of the pulse is reversed twice within each period. In this scheme the system features light hot spots in the center of each fiber section, where the energy of the light pulse is tightly focused in a short temporal slot. Comprehensive numerical studies demonstrate a long-lasting propagation also under the influence of a strong fiber Kerr nonlinearity.}}, author = {{Driben, R. and Meier, Torsten}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, number = {{4}}, title = {{{Regeneration of Airy pulses in fiber-optic links with dispersion management of the two leading dispersion terms of opposite signs}}}, doi = {{10.1103/physreva.89.043817}}, volume = {{89}}, year = {{2014}}, } @article{13510, author = {{Hoffmann, Alexander and Rohrmüller, Martin and Jesser, Anton and dos Santos Vieira, Ines and Schmidt, Wolf Gero and Herres-Pawlis, Sonja}}, issn = {{0192-8651}}, journal = {{Journal of Computational Chemistry}}, number = {{29-30}}, pages = {{2146--2161}}, title = {{{Geometrical and optical benchmarking of copper(II) guanidine-quinoline complexes: Insights from TD-DFT and many-body perturbation theory (part II)}}}, doi = {{10.1002/jcc.23740}}, volume = {{35}}, year = {{2014}}, } @article{13509, author = {{Oh, Deok Mahn and Wippermann, S. and Schmidt, Wolf Gero and Yeom, Han Woong}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{15}}, title = {{{Oxygen adsorbates on the Si(111)4×1-In metallic atomic wire: Scanning tunneling microscopy and density-functional theory calculations}}}, doi = {{10.1103/physrevb.90.155432}}, volume = {{90}}, year = {{2014}}, } @article{13511, author = {{Landmann, M and Köhler, T and Rauls, E and Frauenheim, T and Schmidt, Wolf Gero}}, issn = {{0953-8984}}, journal = {{Journal of Physics: Condensed Matter}}, title = {{{The atomic structure of ternary amorphous TixSi1−xO2hybrid oxides}}}, doi = {{10.1088/0953-8984/26/25/253201}}, volume = {{26}}, year = {{2014}}, } @article{13513, author = {{Gerstmann, Uwe and Vollmers, N. J. and Lücke, A. and Babilon, M. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{16}}, title = {{{Rashba splitting and relativistic energy shifts in In/Si(111) nanowires}}}, doi = {{10.1103/physrevb.89.165431}}, volume = {{89}}, year = {{2014}}, } @article{13516, author = {{Sanna, S. and Schmidt, Wolf Gero and Rode, S. and Klassen, S. and Kühnle, A.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{7}}, title = {{{Unraveling theLiNbO3X-cut surface by atomic force microscopy and density functional theory}}}, doi = {{10.1103/physrevb.89.075403}}, volume = {{89}}, year = {{2014}}, }