@article{7311, author = {{Soldat, Henning and Li, Mingyuan and Gerhardt, Nils C. and Hofmann, Martin R. and Ludwig, Arne and Ebbing, Astrid and Reuter, Dirk and Wieck, Andreas D. and Stromberg, Frank and Keune, Werner and Wende, Heiko}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, number = {{5}}, publisher = {{AIP Publishing}}, title = {{{Room temperature spin relaxation length in spin light-emitting diodes}}}, doi = {{10.1063/1.3622662}}, volume = {{99}}, year = {{2011}}, } @article{7335, author = {{Krenner, Hubert J. and Völk, Stefan and Schülein, Florian J. R. and Knall, Florian and Wixforth, Achim and Reuter, Dirk and Wieck, Andreas D. and Kim, Hyochul and Truong, Tuan A. and Petroff, Pierre M.}}, issn = {{1862-6351}}, journal = {{physica status solidi (c)}}, number = {{2}}, pages = {{407--410}}, publisher = {{Wiley}}, title = {{{Surface acoustic wave controlled carrier injection into self-assembled quantum dots and quantum posts}}}, doi = {{10.1002/pssc.201100236}}, volume = {{9}}, year = {{2011}}, } @article{4377, abstract = {{Confocal Raman spectroscopy was performed as an archetype imaging method to study the ferroelectric domain structure of periodically poled lithium niobate. More precisely, the linkage out of spatial resolution and spectral information proved itself as very useful. Here a specific modulation of the Raman lines by the local variation of polarity and a non-symmetric measuring-signal across the domain structure were found, which allows for imaging of domain boundaries as well as oppositely orientated domains. The high potential of this method is demonstrated by the visualization of the ferroelectric domain structures based on various phonon modes.}}, author = {{Berth, Gerhard and Hahn, Wjatscheslaw and Wiedemeier, Volker and Zrenner, Artur and Sanna, Simone and Schmidt, Wolf Gero}}, issn = {{0015-0193}}, journal = {{Ferroelectrics}}, keywords = {{Raman spectroscopy, ferroelectric domains, LiNbO3, confocal imaging}}, number = {{1}}, pages = {{44--48}}, publisher = {{Informa UK Limited}}, title = {{{Imaging of the Ferroelectric Domain Structures by Confocal Raman Spectroscopy}}}, doi = {{10.1080/00150193.2011.594774}}, volume = {{420}}, year = {{2011}}, } @article{4378, abstract = {{Using a combined all-ultra-high-vacuum process employing lateral patterning with focused ion beams and molecular beam epitaxy, site-selective growth of single (In,Ga)As quantum dots is achieved. We have embedded such a layer of intentionally positioned quantum dots in the intrinsic region of a p-i-n junction so that the quantum dots can be driven electrically. In this contribution, we will present our results on the morphological properties of the ion-beam modified surface on which the quantum dot nucleation occurs together with a characterization of the electrical and optoelectronic properties. We will demonstrate that a single, individual quantum dot can directly be electrically addressed.}}, author = {{Mehta, Minisha and Reuter, Dirk and Wieck, Andreas D. and Michaelis de Vasconcellos, Steffen and Zrenner, Artur and Meier, Cedrik}}, issn = {{1862-6351}}, journal = {{physica status solidi (c)}}, keywords = {{molecular beam epitaxy, quantum dot, site control, electroluminescence}}, number = {{4}}, pages = {{1182--1185}}, publisher = {{Wiley}}, title = {{{Electrically driven intentionally positioned single quantum dot}}}, doi = {{10.1002/pssc.201000828}}, volume = {{8}}, year = {{2011}}, } @article{4379, abstract = {{Uniform mesoporous Si double layers are formed on 4 inch p-type < 100> wafers with an off orientation of 6º towards < 111> by means of electrochemical etching in ethanoic-based HF electrolytes. These substrates are of interest for the epitaxial growth of III–V compound semiconductor stacks on their top for the production of multi-junction solar cells and very thin electronic devices. We demonstrate transfer of porous layers after an annealing process in hydrogen atmosphere. Electron Back-Scatter Diffraction analysis confirms that the substrate orientation is conserved during the etching and annealing steps. Confocal μ-Raman spectroscopy analysis shows a decrease in the Raman signal intensity after etching and a subsequent increase after annealing while no shift is observed. By means of Atomic Force Microscopy, analysis the surface appearance after the etching and annealing steps can be visualized. The mean surface roughness varies during the process from 0.55 nm for the unprocessed wafers to 0.27 nm after etching and 0.78 nm after annealing. The decrease of average roughness after etching is caused by an electropolishing step prior to porous formation. Despite of slight increase of mean surface roughness after annealing the samples are still appropriate for high quality epitaxial growth and subsequent lift-off.}}, author = {{Garralaga Rojas, E. and Terheiden, B. and Plagwitz, H. and Hensen, J. and Wiedemeier, V. and Berth, Gerhard and Zrenner, Artur and Brendel, R.}}, issn = {{0040-6090}}, journal = {{Thin Solid Films}}, keywords = {{Porous Si, Layer transfer, Thin-film, Photovoltaics}}, number = {{1}}, pages = {{606--609}}, publisher = {{Elsevier BV}}, title = {{{Lift-off of mesoporous layers by electrochemical etching on Si (100) substrates with miscut of 6° off towards (111)}}}, doi = {{10.1016/j.tsf.2011.07.063}}, volume = {{520}}, year = {{2011}}, } @article{1723, author = {{Utikal, Tobias and Zentgraf, Thomas and Tikhodeev, Sergei G. and Lippitz, Markus and Giessen, Harald}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{7}}, publisher = {{American Physical Society (APS)}}, title = {{{Tailoring the photonic band splitting in metallodielectric photonic crystal superlattices}}}, doi = {{10.1103/physrevb.84.075101}}, volume = {{84}}, year = {{2011}}, } @article{1724, author = {{Gharghi, Majid and Gladden, Christopher and Zentgraf, Thomas and Liu, Yongmin and Yin, Xiaobo and Valentine, Jason and Zhang, Xiang}}, issn = {{1530-6984}}, journal = {{Nano Letters}}, number = {{7}}, pages = {{2825--2828}}, publisher = {{American Chemical Society (ACS)}}, title = {{{A Carpet Cloak for Visible Light}}}, doi = {{10.1021/nl201189z}}, volume = {{11}}, year = {{2011}}, } @article{7495, author = {{Urbanski, Martin and Piegdon, Karoline A. and Meier, Cedrik and Kitzerow, Heinz-Siegfried}}, issn = {{0267-8292}}, journal = {{Liquid Crystals}}, number = {{4}}, pages = {{475--482}}, publisher = {{Informa UK Limited}}, title = {{{Investigations on the director field around microdisc resonators}}}, doi = {{10.1080/02678292.2011.552742}}, volume = {{38}}, year = {{2011}}, } @article{39733, author = {{Redler, Andreas and Hoischen, Andreas and Kitzerow, Heinz-Siegfried}}, issn = {{1542-1406}}, journal = {{Molecular Crystals and Liquid Crystals}}, keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}}, number = {{1}}, pages = {{97/[1787]--107/[1797]}}, publisher = {{Informa UK Limited}}, title = {{{Liquid Crystal/Polymer Composites: Kinetic Study of the Grating Formation in Holographic Polymer-Dispersed Liquid Crystals}}}, doi = {{10.1080/15421406.2011.572798}}, volume = {{547}}, year = {{2011}}, } @article{39730, author = {{Mirzaei, Javad and Urbanski, Martin and Yu, Kui and Kitzerow, Heinz-Siegfried and Hegmann, Torsten}}, issn = {{0959-9428}}, journal = {{Journal of Materials Chemistry}}, keywords = {{Materials Chemistry, General Chemistry}}, number = {{34}}, publisher = {{Royal Society of Chemistry (RSC)}}, title = {{{Nanocomposites of a nematic liquid crystal doped with magic-sized CdSe quantum dots}}}, doi = {{10.1039/c1jm11832c}}, volume = {{21}}, year = {{2011}}, } @article{39732, author = {{Wahle, Markus and Kasdorf, Olga and Kitzerow, Heinz-Siegfried and Liang, Yanyu and Feng, Xinliang and Müllen, Klaus}}, issn = {{1542-1406}}, journal = {{Molecular Crystals and Liquid Crystals}}, keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}}, number = {{1}}, pages = {{187/[953]--193/[959]}}, publisher = {{Informa UK Limited}}, title = {{{Electrooptic Switching in Graphene-Based Liquid Crystal Cells}}}, doi = {{10.1080/15421406.2011.569524}}, volume = {{543}}, year = {{2011}}, } @article{39735, author = {{Lorenz, Alexander and Kitzerow, Heinz-Siegfried}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{24}}, publisher = {{AIP Publishing}}, title = {{{Efficient electro-optic switching in a photonic liquid crystal fiber}}}, doi = {{10.1063/1.3599848}}, volume = {{98}}, year = {{2011}}, } @inproceedings{4312, abstract = {{The intensity dependence of optically-induced injection currents in semiconductor quantum wells is investigated numerically. Oscillatory behavior of the electron charge current transients as function of intensity and time is predicted and explained.}}, author = {{Pochwala, Michal and Duc, Huynh Thanh and Förstner, Jens and Meier, Torsten}}, booktitle = {{CLEO:2011 - Laser Applications to Photonic Applications}}, isbn = {{9781557529107}}, issn = {{2160-8989 }}, keywords = {{tet_topic_qw}}, location = {{Baltimore, Maryland (USA)}}, publisher = {{Optical Society of America}}, title = {{{Intensity dependence of optically-induced injection currents in semiconductor quantum wells}}}, doi = {{10.1364/qels.2011.qmk4}}, year = {{2011}}, } @inproceedings{4048, abstract = {{We present an ab-initio method for calculating nonlinear and nonlocal optical effects in metallic slabs with sub-wavelength thickness. We find a strong localization of the second-harmonic current at the metal-vacuum interface.}}, author = {{Wand, Mathias and Schindlmayr, Arno and Meier, Torsten and Förstner, Jens}}, booktitle = {{CLEO:2011 - Laser Applications to Photonic Applications }}, isbn = {{978-1-4577-1223-4}}, issn = {{2160-8989}}, keywords = {{tet_topic_shg}}, location = {{Baltimore, Maryland, United States}}, publisher = {{Optical Society of America}}, title = {{{Theoretical approach to the ultrafast nonlinear optical response of metal slabs}}}, doi = {{10.1364/CLEO_AT.2011.JTuI59}}, year = {{2011}}, } @inproceedings{4042, abstract = {{A simulation environment for metallic nanostructures based on the Discontinuous Galerkin Time Domain method is presented. It is used to model optical transmission by silver bi‐chiral plasmonic crystals. The results of simulations qualitatively and quantitavely agree with experimental measurements of transmitted circular polarization.}}, author = {{Grynko, Yevgen and Förstner, Jens and Meier, Torsten and Radke, André and Gissibl, Timo and Braun, Paul V. and Giessen, Harald}}, editor = {{Chigrin, Dmitry N.}}, keywords = {{tet_topic_meta}}, number = {{1}}, pages = {{76--78}}, publisher = {{AIP}}, title = {{{Application of the Discontinuous Galerkin Time Domain Method to the Optics of Bi-Chiral Plasmonic Crystals}}}, doi = {{10.1063/1.3644217}}, volume = {{1398}}, year = {{2011}}, } @article{13565, author = {{Müllegger, Stefan and Schöfberger, Wolfgang and Rashidi, Mohammad and Lengauer, Thomas and Klappenberger, Florian and Diller, Katharina and Kara, Kamuran and Barth, Johannes V. and Rauls, Eva and Schmidt, Wolf Gero and Koch, Reinhold}}, issn = {{1936-0851}}, journal = {{ACS Nano}}, number = {{8}}, pages = {{6480--6486}}, title = {{{Preserving Charge and Oxidation State of Au(III) Ions in an Agent-Functionalized Nanocrystal Model System}}}, doi = {{10.1021/nn201708c}}, volume = {{5}}, year = {{2011}}, } @article{13566, author = {{Hoehne, Felix and Lu, Jinming and Stegner, Andre R. and Stutzmann, Martin and Brandt, Martin S. and Rohrmüller, Martin and Schmidt, Wolf Gero and Gerstmann, Uwe}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{19}}, title = {{{Electrically Detected Electron-Spin-Echo Envelope Modulation: A Highly Sensitive Technique for Resolving Complex Interface Structures}}}, doi = {{10.1103/physrevlett.106.196101}}, volume = {{106}}, year = {{2011}}, } @article{13568, author = {{Mietze, C. and Landmann, M. and Rauls, E. and Machhadani, H. and Sakr, S. and Tchernycheva, M. and Julien, F. H. and Schmidt, Wolf Gero and Lischka, K. and As, Donat Josef}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{19}}, title = {{{Band offsets in cubic GaN/AlN superlattices}}}, doi = {{10.1103/physrevb.83.195301}}, volume = {{83}}, year = {{2011}}, } @article{13570, author = {{Müllegger, S. and Rashidi, M. and Lengauer, T. and Rauls, E. and Schmidt, Wolf Gero and Knör, G. and Schöfberger, W. and Koch, R.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{16}}, title = {{{Asymmetric saddling of single porphyrin molecules on Au(111)}}}, doi = {{10.1103/physrevb.83.165416}}, volume = {{83}}, year = {{2011}}, } @article{13567, author = {{Konopka, A. and Greulich-Weber, S. and Dierolf, V. and Jiang, H.X. and Gerstmann, Uwe and Rauls, E. and Sanna, S. and Schmidt, Wolf Gero}}, issn = {{0925-3467}}, journal = {{Optical Materials}}, pages = {{1041--1044}}, title = {{{Microscopic structure and energy transfer of vacancy-related defect pairs with Erbium in wide-gap semiconductors}}}, doi = {{10.1016/j.optmat.2010.12.005}}, volume = {{33}}, year = {{2011}}, }