@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{15869, author = {{Wiebeler, Christian and Tautz, Raphael and Feldmann, Jochen and von Hauff, Elizabeth and Da Como, Enrico and Schumacher, Stefan}}, issn = {{1520-6106}}, journal = {{The Journal of Physical Chemistry B}}, pages = {{4454--4460}}, title = {{{Spectral Signatures of Polarons in Conjugated Co-polymers}}}, doi = {{10.1021/jp3084869}}, year = {{2012}}, } @article{15872, author = {{Montgomery, Neil A. and Hedley, Gordon J. and Ruseckas, Arvydas and Denis, Jean-Christophe and Schumacher, Stefan and Kanibolotsky, Alexander L. and Skabara, Peter J. and Galbraith, Ian and Turnbull, Graham A. and Samuel, Ifor D. W.}}, issn = {{1463-9076}}, journal = {{Physical Chemistry Chemical Physics}}, title = {{{Dynamics of fluorescence depolarisation in star-shaped oligofluorene-truxene molecules}}}, doi = {{10.1039/c2cp24141b}}, year = {{2012}}, } @article{16109, author = {{Bartley, Tim and Donati, Gaia and Spring, Justin B. and Jin, Xian-Min and Barbieri, Marco and Datta, Animesh and Smith, Brian J. and Walmsley, Ian A.}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, title = {{{Multiphoton state engineering by heralded interference between single photons and coherent states}}}, doi = {{10.1103/physreva.86.043820}}, year = {{2012}}, } @article{13531, author = {{Schmidt, Christian and Breuer, Tobias and Wippermann, Stefan and Schmidt, Wolf Gero and Witte, Gregor}}, issn = {{1932-7447}}, journal = {{The Journal of Physical Chemistry C}}, pages = {{24098--24106}}, title = {{{Substrate Induced Thermal Decomposition of Perfluoro-Pentacene Thin Films on the Coinage Metals}}}, doi = {{10.1021/jp307316r}}, volume = {{116}}, year = {{2012}}, } @article{13534, author = {{Wall, Simone and Krenzer, Boris and Wippermann, Stefan and Sanna, Simone and Klasing, Friedrich and Hanisch-Blicharski, Anja and Kammler, Martin and Schmidt, Wolf Gero and Horn-von Hoegen, Michael}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, number = {{18}}, title = {{{Atomistic Picture of Charge Density Wave Formation at Surfaces}}}, doi = {{10.1103/physrevlett.109.186101}}, volume = {{109}}, year = {{2012}}, } @article{13535, author = {{Sanna, S. and Schmidt, Wolf Gero}}, issn = {{0885-3010}}, journal = {{IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control}}, number = {{9}}, pages = {{1925--1928}}, title = {{{Ferroelectric phase transition in LiNbO3: Insights from molecular dynamics}}}, doi = {{10.1109/tuffc.2012.2408}}, volume = {{59}}, year = {{2012}}, } @article{13536, author = {{Riefer, Arthur and Sanna, Simone and Gavrilenko, Alexander V. and Schmidt, Wolf Gero}}, issn = {{0885-3010}}, journal = {{IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control}}, number = {{9}}, pages = {{1929--1933}}, title = {{{Linear and nonlinear optical response of LiNbO3 calculated from first principles}}}, doi = {{10.1109/tuffc.2012.2409}}, volume = {{59}}, year = {{2012}}, } @article{13538, author = {{Riefer, A. and Sanna, S. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{12}}, title = {{{Polarization-dependent methanol adsorption on lithium niobate Z-cut surfaces}}}, doi = {{10.1103/physrevb.86.125410}}, volume = {{86}}, year = {{2012}}, } @article{13539, author = {{Rode, S. and Hölscher, R. and Sanna, S. and Klassen, S. and Kobayashi, K. and Yamada, H. and Schmidt, Wolf Gero and Kühnle, A.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{7}}, title = {{{Atomic-resolution imaging of the polar (0001¯) surface of LiNbO3in aqueous solution by frequency modulation atomic force microscopy}}}, doi = {{10.1103/physrevb.86.075468}}, volume = {{86}}, year = {{2012}}, } @article{13541, author = {{Landmann, M. and Köhler, T. and Köppen, S. and Rauls, E. and Frauenheim, T. and Schmidt, Wolf Gero}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{6}}, title = {{{Fingerprints of order and disorder in the electronic and optical properties of crystalline and amorphous TiO2}}}, doi = {{10.1103/physrevb.86.064201}}, volume = {{86}}, year = {{2012}}, } @article{13542, author = {{Thissen, Peter and Peixoto, Tatiana and Longo, Roberto C. and Peng, Weina and Schmidt, Wolf Gero and Cho, Kyeongjae and Chabal, Yves J.}}, issn = {{0002-7863}}, journal = {{Journal of the American Chemical Society}}, pages = {{8869--8874}}, title = {{{Activation of Surface Hydroxyl Groups by Modification of H-Terminated Si(111) Surfaces}}}, doi = {{10.1021/ja300270w}}, volume = {{134}}, year = {{2012}}, } @article{13543, author = {{Rauls, E. and Schmidt, Wolf Gero and Pertram, T. and Wandelt, K.}}, issn = {{0039-6028}}, journal = {{Surface Science}}, pages = {{1120--1125}}, title = {{{Interplay between metal-free phthalocyanine molecules and Au(110) substrates}}}, doi = {{10.1016/j.susc.2012.03.010}}, volume = {{606}}, year = {{2012}}, } @article{13545, author = {{Landmann, M and Rauls, E and Schmidt, Wolf Gero}}, issn = {{0953-8984}}, journal = {{Journal of Physics: Condensed Matter}}, title = {{{The electronic structure and optical response of rutile, anatase and brookite TiO2}}}, doi = {{10.1088/0953-8984/24/19/195503}}, volume = {{24}}, year = {{2012}}, }