@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{15969, author = {{Lauter, Christian and Sarrazin, M. and Tröster, Thomas}}, journal = {{Adhäsion – Kleben und Dichten}}, pages = {{39--43}}, publisher = {{Springer Vieweg}}, title = {{{Multimaterialsysteme höchstfest verbunden}}}, volume = {{3/2011}}, year = {{2011}}, } @inproceedings{15971, author = {{Frantz, Meike and Stübbe, O. and Lauter, Christian and Schrange, J. and Tröster, Thomas}}, location = {{Köln}}, title = {{{Mechatronisches System zur Bestimmung der Restlebensdauer von Faserverbund-Leichtbaustrukturen am Beispiel einer Lauffeder}}}, year = {{2011}}, } @inproceedings{15972, author = {{Thomas, D. and Block, H. and Tröster, Thomas and Krogmeier, J.}}, location = {{Köln}}, title = {{{Herstellung von belastungsgerechten Strukturbauteilen mittels partieller induktiver Härtung}}}, year = {{2011}}, } @article{15974, author = {{Marten, Thorsten and Lauter, Christian and Tröster, Thomas}}, journal = {{Ingenieurspiegel}}, pages = {{67--69}}, publisher = {{Public Verlagsgesellschaft und Anzeigenagentur}}, title = {{{Automobilleichtbau durch höchstfeste Multimaterialsysteme}}}, volume = {{2/2011}}, year = {{2011}}, } @article{15975, author = {{Lauter, Christian and Thomas, D. and Frantz, Meike and Niewel, J. and Tröster, Thomas}}, journal = {{Werkstoffe in der Fertigung – Die Fachzeitschrift für technische Führungskräfte}}, pages = {{6--7}}, publisher = {{HW-Verlag}}, title = {{{Belastungsangepasste Strukturbauteile für Automobile aus höchstfesten Werkstoffen und Hybridwerkstoffen}}}, volume = {{2}}, year = {{2011}}, } @article{15980, author = {{Lauter, Christian and Frantz, Meike and Siewers, Bernd and Tröster, Thomas}}, journal = {{JEC Composites Magazine}}, pages = {{35--37}}, publisher = {{JEC Composites}}, title = {{{Hybrid structures for tailored structural automotive components}}}, volume = {{69}}, year = {{2011}}, } @inproceedings{15990, author = {{Thomas, D. and Block, H. and Tröster, Thomas}}, location = {{Salzburg}}, title = {{{Production of load-adapted lightweight designs by partial hardening}}}, year = {{2011}}, } @article{15992, author = {{Gorny, B. and Niendorf, T. and Lackmann, J. and Thoene, M. and Tröster, Thomas and Maier, H.J.}}, issn = {{0921-5093}}, journal = {{Materials Science and Engineering: A}}, number = {{27}}, pages = {{7962--7967}}, title = {{{In situ characterization of the deformation and failure behavior of non-stochastic porous structures processed by selective laser melting}}}, doi = {{10.1016/j.msea.2011.07.026}}, volume = {{528}}, year = {{2011}}, } @article{15993, author = {{Lauter, Christian and Frantz, Meike and Tröster, Thomas}}, journal = {{Lightweight Design}}, pages = {{48--54}}, title = {{{Großserientaugliche Herstellung höchstfester Hybridwerkstoffe durch Prepregpressen}}}, volume = {{4}}, year = {{2011}}, } @inproceedings{15996, author = {{Frantz, Meike and Lauter, Christian and Tröster, Thomas}}, location = {{Ilmenau}}, title = {{{Advanced manufacturing technologies for automotive structures in multi-material design consisting of high-strength steels and CFRP}}}, year = {{2011}}, } @article{15997, author = {{Lauter, Christian and Frantz, Meike and Marten, Thorsten and Tröster, Thomas and Bach, G. and Seliger, G.}}, journal = {{Konstruktion: Zeitschrift für Produktentwicklung und Ingenieur-Werkstoffe}}, number = {{09/2011}}, publisher = {{Springer-VDI-Verlag}}, title = {{{Höchstfeste Hybridwerkstoffe aus Stahl und Faserverbundkunststoffen}}}, year = {{2011}}, } @article{15998, author = {{Frantz, Meike and Lauter, Christian and Tröster, Thomas}}, journal = {{Konstruktion: Zeitschrift für Produktentwicklung und Ingenieur-Werkstoffe}}, number = {{10/2011}}, publisher = {{Springer-VDI-Verlag}}, title = {{{Schadensdetektion in hybriden Metall-Faserverbundkunststoff-Konstruktionen}}}, year = {{2011}}, } @inproceedings{16002, author = {{Tröster, Thomas and Lauter, Christian}}, location = {{Landshut}}, title = {{{Hybridstrukturen für den automobilen Leichtbau}}}, year = {{2011}}, } @article{16013, author = {{Lauter, Christian and Frantz, Meike and Tröster, Thomas}}, issn = {{1865-4819}}, journal = {{Lightweight Design}}, pages = {{48--54}}, title = {{{Großserientaugliche Herstellung von Hybridwerkstoffen durch Prepregpressen}}}, doi = {{10.1365/s35725-011-0044-5}}, volume = {{4}}, year = {{2011}}, } @article{16000, author = {{Marten, Thorsten and Niewel, J. and Tröster, Thomas}}, issn = {{1867-2493}}, journal = {{HTM Journal of Heat Treatment and Materials}}, pages = {{309--315}}, title = {{{Untersuchung alternativer Erwärmungsverfahren für den Presshärteprozess}}}, doi = {{10.3139/105.110119}}, year = {{2011}}, }