@article{4131, abstract = {{We report an anisotropic formation of defects in cubic GaN grown on nano-patterned 3C-SiC/Si (001) by molecular beam epitaxy. Nano-patterning of 3C-SiC/Si (001) is achieved by nanosphere lithography and a reactive ion etching process. Atomic force microscopy and scanning electron microscopy show that the selectivearea- grown cubic GaN nucleates in two structurally different domains, which most probably originate from the substrate. In adjacent domains the formation of defects, especially hexagonal inclusions, is different and leads to two different surface morphologies. The dominant phase within these domains was measured by electron backscatter diffraction. Optical properties were investigated by micro-photoluminescence and cathodoluminescence spectroscopy.}}, author = {{Kemper, R. M. and Häberlen, M. and Schupp, T. and Weinl, M. and Bürger, M. and Ruth, M. and Meier, Cedrik and Niendorf, T. and Maier, H. J. and Lischka, K. and As, D. J. and Lindner, Jörg}}, issn = {{1862-6351}}, journal = {{physica status solidi (c)}}, number = {{3-4}}, pages = {{1028--1031}}, publisher = {{Wiley}}, title = {{{Formation of defects in cubic GaN grown on nano-patterned 3C-SiC (001)}}}, doi = {{10.1002/pssc.201100174}}, volume = {{9}}, year = {{2012}}, } @inproceedings{4380, abstract = {{The structural and vibrational properties of lithium niobate (LN) – lithium tantalate (LT) mixed crystals (LNT, LiNb1-xTaxO3) are investigated over the whole composition range by first-principles simulations. The crystal volume grows roughly linearly from LT to LN, whereby the lattice parameters a and c show minor deviations from the Vegard behavior between the end compounds, LiNbO3 and LiTaO3. Our calculations in the framework of the density functional theory show the TO1, TO2 and TO4-modes to become harder with increasing Nb concentration. TO3 becomes softer with increasing Nb content, instead. The frequency shifts of the zone center A1-TO phonon modes for crystals with different compositions are found to be as large as 30 cm-1. Raman spectroscopy, which is sensitive to the A1 modes, can be therefore employed to determine the crystal composition.}}, author = {{Sanna, Simone and Riefer, Arthur and Neufeld, Sergej and Schmidt, Wolf Gero and Berth, Gerhard and Widhalm, Alex and Zrenner, Artur}}, booktitle = {{Proceedings of ISAF-ECAPD-PFM 2012}}, keywords = {{Ferroelectrics, Vibrational properties, LiNbO3, LiTaO3, Mixed Crystals}}, location = {{Aveiro, Portugal}}, title = {{{Vibrational fingerprints of LiNbO3-LiTaO3 mixed crystals}}}, year = {{2012}}, } @inbook{4381, abstract = {{Coherent physics and applications of exciton qubits in electric fi eld tunable quantum dot structures are our focus. Excitations with picosecond (ps) laser pulses result in qubit rotations. Using state projection by tunnelling the readout can be performed in quantitative way. As a function of electric fi eld induced detuning Ramsey fringes of a single exciton qubit can be observed and controlled for double pulse excitation. Therefore it is possible to demonstrate voltage controlled qubit manipulations within a wide range of pulse delays. Using fast electric signals, phase-locked to ps-laser pulses, the coherent control of an exciton qubit can be obtained by electric interaction. Such voltage controlled qubit manipulations seem to be essential for new types of optoelectronic quantum gates and novel applications in the fi eld of coherent optoelectronics.}}, author = {{Michaelis de Vasconcellos, Steffen and Gordon, Simon and Mantei, Dirk and Leier, Yves Alexander and Al-Hmoud, M. and Quiring, Wadim and Zrenner, Artur}}, booktitle = {{QUANTUM OPTICS WITH SEMICONDUCTOR NANOSTRUCTURES}}, editor = {{Jahnke, Frank}}, isbn = {{9780857092328 0857092324}}, keywords = {{excitons, quantum bits, coherent manipulation, Ramsey interference, quantum gate}}, pages = {{528--559}}, publisher = {{Woodhead Publishing}}, title = {{{Coherent optoelectronics with quantum dots}}}, year = {{2012}}, } @article{1711, author = {{Huang, Lingling and Chen, Xianzhong and Mühlenbernd, Holger and Li, Guixin and Bai, Benfeng and Tan, Qiaofeng and Jin, Guofan and Zentgraf, Thomas and Zhang, Shuang}}, issn = {{1530-6984}}, journal = {{Nano Letters}}, number = {{11}}, pages = {{5750--5755}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Dispersionless Phase Discontinuities for Controlling Light Propagation}}}, doi = {{10.1021/nl303031j}}, volume = {{12}}, year = {{2012}}, } @article{1712, author = {{Ye, Ziliang and Zhang, Shuang and Wang, Yuan and Park, Yong-Shik and Zentgraf, Thomas and Bartal, Guy and Yin, Xiaobo and Zhang, Xiang}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{15}}, publisher = {{American Physical Society (APS)}}, title = {{{Mapping the near-field dynamics in plasmon-induced transparency}}}, doi = {{10.1103/physrevb.86.155148}}, volume = {{86}}, year = {{2012}}, } @article{1713, author = {{Liu, Yongmin and Palomba, Stefano and Park, Yongshik and Zentgraf, Thomas and Yin, Xiaobo and Zhang, Xiang}}, issn = {{1530-6984}}, journal = {{Nano Letters}}, number = {{9}}, pages = {{4853--4858}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Compact Magnetic Antennas for Directional Excitation of Surface Plasmons}}}, doi = {{10.1021/nl302339z}}, volume = {{12}}, year = {{2012}}, } @article{1714, author = {{Lanzillotti-Kimura, N. D. and Zentgraf, Thomas and Zhang, X.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{4}}, publisher = {{American Physical Society (APS)}}, title = {{{Control of plasmon dynamics in coupled plasmonic hybrid mode microcavities}}}, doi = {{10.1103/physrevb.86.045309}}, volume = {{86}}, year = {{2012}}, } @article{1715, author = {{Ishikawa, Atsushi and Oulton, Rupert F. and Zentgraf, Thomas and Zhang, Xiang}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{15}}, publisher = {{American Physical Society (APS)}}, title = {{{Slow-light dispersion by transparent waveguide plasmon polaritons}}}, doi = {{10.1103/physrevb.85.155108}}, volume = {{85}}, year = {{2012}}, } @article{7493, author = {{Piegdon, K. A. and Lexow, M. and Grundmeier, G. and Kitzerow, Heinz-Siegfried and Pärschke, K. and Mergel, D. and Reuter, Dirk and Wieck, A. D. and Meier, Cedrik}}, issn = {{1094-4087}}, journal = {{Optics Express}}, number = {{6}}, publisher = {{The Optical Society}}, title = {{{All-optical tunability of microdisk lasers via photo-adressable polyelectrolyte functionalization}}}, doi = {{10.1364/oe.20.006060}}, volume = {{20}}, year = {{2012}}, } @article{7328, author = {{Piegdon, K. A. and Lexow, M. and Grundmeier, G. and Kitzerow, Heinz-Siegfried and Pärschke, K. and Mergel, D. and Reuter, Dirk and Wieck, A. D. and Meier, C.}}, issn = {{1094-4087}}, journal = {{Optics Express}}, number = {{6}}, publisher = {{The Optical Society}}, title = {{{All-optical tunability of microdisk lasers via photo-adressable polyelectrolyte functionalization}}}, doi = {{10.1364/oe.20.006060}}, volume = {{20}}, year = {{2012}}, } @article{35338, author = {{Tang, Mingxue and Redler, Andreas and Topgaard, Daniel and Schmidt, Claudia and Kitzerow, Heinz-Siegfried}}, issn = {{0303-402X}}, journal = {{Colloid and Polymer Science}}, keywords = {{Materials Chemistry, Colloid and Surface Chemistry, Polymers and Plastics, Physical and Theoretical Chemistry}}, number = {{8}}, pages = {{751--755}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Kinetics of the grating formation in holographic polymer-dispersed liquid crystals: NMR measurement of diffusion coefficients}}}, doi = {{10.1007/s00396-012-2623-0}}, volume = {{290}}, year = {{2012}}, } @article{39727, author = {{Lorenz, Alexander and Zimmermann, Natalie and Kumar, Satyendra and Evans, Dean R. and Cook, Gary and Kitzerow, Heinz-Siegfried}}, issn = {{1539-3755}}, journal = {{Physical Review E}}, keywords = {{Industrial and Manufacturing Engineering, Metals and Alloys, Strategy and Management, Mechanical Engineering}}, number = {{5}}, publisher = {{American Physical Society (APS)}}, title = {{{Doping the nematic liquid crystal 5CB with milled BaTiO3nanoparticles}}}, doi = {{10.1103/physreve.86.051704}}, volume = {{86}}, year = {{2012}}, } @article{39729, author = {{Atorf, B. and Hoischen, A. and Ros, M. B. and Gimeno, N. and Tschierske, C. and Dantlgraber, G. and Kitzerow, Heinz-Siegfried}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{22}}, publisher = {{AIP Publishing}}, title = {{{Switching performance of a polymer-stabilized antiferroelectric liquid crystal based on bent-core molecules}}}, doi = {{10.1063/1.4722794}}, volume = {{100}}, year = {{2012}}, } @article{39728, author = {{Schmidtke, Jürgen and Jünnemann, Gisela and Keuker-Baumann, Susanne and Kitzerow, Heinz-Siegfried}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{5}}, publisher = {{AIP Publishing}}, title = {{{Electrical fine tuning of liquid crystal lasers}}}, doi = {{10.1063/1.4739840}}, volume = {{101}}, year = {{2012}}, } @article{39722, author = {{Lorenz, Alexander and Zimmermann, Natalie and Kumar, Satyendra and Evans, Dean R. and Cook, Gary and Fernández Martínez, Manuel and Kitzerow, Heinz-Siegfried}}, issn = {{1520-6106}}, journal = {{The Journal of Physical Chemistry B}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Physical and Theoretical Chemistry}}, number = {{3}}, pages = {{937--941}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Doping a Mixture of Two Smectogenic Liquid Crystals with Barium Titanate Nanoparticles}}}, doi = {{10.1021/jp310624c}}, volume = {{117}}, year = {{2012}}, } @article{39724, author = {{Redler, Andreas and Kitzerow, Heinz-Siegfried}}, issn = {{1042-7147}}, journal = {{Polymers for Advanced Technologies}}, keywords = {{Polymers and Plastics}}, number = {{1}}, pages = {{7--9}}, publisher = {{Wiley}}, title = {{{Three-dimensional structure in holographic polymer-dispersed liquid crystals}}}, doi = {{10.1002/pat.3040}}, volume = {{24}}, year = {{2012}}, } @inproceedings{39725, author = {{Mirzaei, Javad and Sawatzky, Ryan and Sharma, Anshul and Urbanski, Martin and Yu, Kui and Kitzerow, Heinz-Siegfried and Hegmann, Torsten}}, booktitle = {{SPIE Proceedings}}, editor = {{Chien, Liang-Chy}}, issn = {{0277-786X}}, publisher = {{SPIE}}, title = {{{New developments in nanoparticle-liquid crystal composites: from magic-sized semiconductor nanoclusters to alignment pattern formation via nanoparticle stenciling}}}, doi = {{10.1117/12.909022}}, year = {{2012}}, } @article{40165, 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 = {{24}}, publisher = {{The Optical Society}}, title = {{{High resolution time-to-space conversion of sub-picosecond pulses at 155µm by non-degenerate SFG in PPLN crystal}}}, doi = {{10.1364/oe.20.027388}}, volume = {{20}}, year = {{2012}}, } @article{40167, author = {{Laiho, Kaisa and Avenhaus, Malte and Silberhorn, Christine}}, issn = {{1367-2630}}, journal = {{New Journal of Physics}}, keywords = {{General Physics and Astronomy}}, number = {{10}}, publisher = {{IOP Publishing}}, title = {{{Characteristics of displaced single photons attained via higher order factorial moments}}}, doi = {{10.1088/1367-2630/14/10/105011}}, volume = {{14}}, year = {{2012}}, } @inproceedings{3980, abstract = {{Paper Abstract High harmonic generation is investigated for a two-band model of a semiconductor nanostructure. Similar to an atomic two-level system, the semiconductor emits high harmonic radiation. We show how one can specifically enhance the emission for a given frequency by applying a non-trivially shaped laser pulse. Therefore, the semiconductor Bloch equations including the interband and additionally the intraband dynamics are solved numerically and the spectral shape of the input pulse is computed via an optimization algorithm. It is demonstrated that desired emission frequencies can be favored even though the overall input power is kept constant. We also suggest special metallic nano geometries to achieve enhanced localized optical fields. They are found by geometric optimization.}}, author = {{Reichelt, Matthias and Hildebrandt, Andre and Walther, Andrea and Förstner, Jens and Meier, Torsten}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XVI}}, isbn = {{9780819489036 }}, keywords = {{tet_topic_shg}}, publisher = {{SPIE}}, title = {{{Engineering high harmonic generation in semiconductors via pulse shaping}}}, doi = {{10.1117/12.906338}}, volume = {{8260}}, year = {{2012}}, }