@inproceedings{7333, author = {{Singh, R. and Moody, G. and Li, H. and Akimov, I. A. and Bayer, M. and Reuter, Dirk and Wieck, A. D. and Cundiff, S. T.}}, booktitle = {{Conference on Lasers and Electro-Optics 2012}}, isbn = {{9781557529435}}, publisher = {{OSA}}, title = {{{Coherence of Fine-Structure States of an InAs Quantum Dot Ensemble Studied with 2D Fourier-Transform Spectroscopy}}}, doi = {{10.1364/cleo_at.2012.jw2a.2}}, year = {{2013}}, } @article{7336, author = {{Komijani, Y. and Choi, T. and Nichele, F. and Ensslin, K. and Ihn, T. and Reuter, Dirk and Wieck, A. D.}}, issn = {{1098-0121}}, journal = {{Physical Review B}}, number = {{3}}, publisher = {{American Physical Society (APS)}}, title = {{{Counting statistics of hole transfer in ap-type GaAs quantum dot with dense excitation spectrum}}}, doi = {{10.1103/physrevb.88.035417}}, volume = {{88}}, year = {{2013}}, } @inproceedings{7337, author = {{Höpfner, Henning and Fritsche, Carola and Ludwig, Arne and Ludwig, Astrid and Stromberg, Frank and Wende, Heiko and Keune, Werner and Reuter, Dirk and Wieck, Andreas D. and Gerhardt, Nils C. and Hofmann, Martin R.}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XVII}}, editor = {{Betz, Markus and Elezzabi, Abdulhakem Y. and Song, Jin-Joo and Tsen, Kong-Thon}}, publisher = {{SPIE}}, title = {{{Spin relaxation in spin light-emitting diodes: effects of magnetic field and temperature}}}, doi = {{10.1117/12.2001511}}, year = {{2013}}, } @article{7488, author = {{Ruth, Marcel and Meier, Cedrik}}, issn = {{2158-3226}}, journal = {{AIP Advances}}, number = {{7}}, publisher = {{AIP Publishing}}, title = {{{Structural enhancement of ZnO on SiO2 for photonic applications}}}, doi = {{10.1063/1.4815974}}, volume = {{3}}, year = {{2013}}, } @inbook{8789, author = {{Reuter, Dirk and Gerth, Gerhard and Kirschner, J.}}, booktitle = {{Surface Diffusion}}, isbn = {{9781489902641}}, issn = {{0258-1221}}, title = {{{Surface Diffusion of 3d-Metals on W(110)}}}, doi = {{10.1007/978-1-4899-0262-7_43}}, year = {{2013}}, } @article{3963, abstract = {{Whispering gallery modes (WGMs) were observed in 60 nm thin cubic AlN microdisk resonators containing a single layer of non-polar cubic GaN quantum dots. Freestanding microdisks were patterned by means of electron beam lithography and a two step reactive ion etching process. Micro-photoluminescence spectroscopy investigations were performed for optical characterization. We analyzed the mode spacing for disk diameters ranging from 2-4 lm. Numerical investigations using three dimensional finite difference time domain calculations were in good agreement with the experimental data. Whispering gallery modes of the radial orders 1 and 2 were identified by means of simulated mode field distributions.}}, author = {{Bürger, M. and Ruth, M. and Declair, S. and Förstner, Jens and Meier, Cedrik and As, Donat Josef}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{tet_topic_qd, tet_topic_microdisk}}, number = {{8}}, pages = {{081105}}, publisher = {{AIP Publishing}}, title = {{{Whispering gallery modes in zinc-blende AlN microdisks containing non-polar GaN quantum dots}}}, doi = {{10.1063/1.4793653}}, volume = {{102}}, year = {{2013}}, } @article{4098, abstract = {{The selective deposition and self-assembly of nanospheres from a colloidal suspension in trenches on silicon surfaces is investigated using conventional light, confocal laser scanning and scanning electron microscopy. Trenches with widths of one to several nanosphere diameters are formed on silicon surfaces by photolithography and reactive ion etching. The spreading knife convective self-assembly technique is employed to distribute the nanosphere suspension on the pre-patterned surface. It is shown that this technique is particularly useful in combination with a functionalized surface where a selfassembled molecular monolayer changes the contact angle such that sphere deposition takes place almost exclusively in the trenches. By this, lines selectively filled with a chain of beads with a length of 0.5 mm have been achieved.}}, author = {{Brassat, Katharina and Assion, Fabian and Hilleringmann, Ulrich and Lindner, Jörg}}, issn = {{1862-6300}}, journal = {{physica status solidi (a)}}, location = {{Warsaw (Poland)}}, number = {{8}}, pages = {{1485--1489}}, publisher = {{Wiley}}, title = {{{Self-organization of nanospheres in trenches on silicon surfaces}}}, doi = {{10.1002/pssa.201200899}}, volume = {{210}}, year = {{2013}}, } @article{1705, author = {{Ruth, Marcel and Zentgraf, Thomas and Meier, Cedrik}}, issn = {{1094-4087}}, journal = {{Optics Express}}, number = {{21}}, publisher = {{The Optical Society}}, title = {{{Blue-green emitting microdisks using low-temperature-grown ZnO on patterned silicon substrates}}}, doi = {{10.1364/oe.21.025517}}, volume = {{21}}, year = {{2013}}, } @article{1706, author = {{Zhang, Shuang and Liu, Fu and Zentgraf, Thomas and Li, Jensen}}, issn = {{1050-2947}}, journal = {{Physical Review A}}, number = {{2}}, publisher = {{American Physical Society (APS)}}, title = {{{Interference-induced asymmetric transmission through a monolayer of anisotropic chiral metamolecules}}}, doi = {{10.1103/physreva.88.023823}}, volume = {{88}}, year = {{2013}}, } @article{1707, author = {{Huang, Lingling and Chen, Xianzhong and Mühlenbernd, Holger and Zhang, Hao and Chen, Shumei and Bai, Benfeng and Tan, Qiaofeng and Jin, Guofan and Cheah, Kok-Wai and Qiu, Cheng-Wei and Li, Jensen and Zentgraf, Thomas and Zhang, Shuang}}, issn = {{2041-1723}}, journal = {{Nature Communications}}, publisher = {{Springer Nature}}, title = {{{Three-dimensional optical holography using a plasmonic metasurface}}}, doi = {{10.1038/ncomms3808}}, volume = {{4}}, year = {{2013}}, } @article{1708, author = {{Chen, Xianzhong and Huang, Lingling and Mühlenbernd, Holger and Li, Guixin and Bai, Benfeng and Tan, Qiaofeng and Jin, Guofan and Qiu, Cheng-Wei and Zentgraf, Thomas and Zhang, Shuang}}, issn = {{2195-1071}}, journal = {{Advanced Optical Materials}}, number = {{7}}, pages = {{517--521}}, publisher = {{Wiley-Blackwell}}, title = {{{Reversible Three-Dimensional Focusing of Visible Light with Ultrathin Plasmonic Flat Lens}}}, doi = {{10.1002/adom.201300102}}, volume = {{1}}, year = {{2013}}, } @article{1709, author = {{Zhang, Shuang and Chen, Xianzhong and Huang, Lingling and Bai, Benfeng and Tan, Qiaofeng and Jin, Guofan and Mühlenbernd, Holger and Zentgraf, Thomas and Li, Guixin and Qiu, Cheng-Wei}}, issn = {{1818-2259}}, journal = {{SPIE Newsroom}}, publisher = {{SPIE-Intl Soc Optical Eng}}, title = {{{Metalens with convex and concave functionality}}}, doi = {{10.1117/2.1201304.004812}}, year = {{2013}}, } @article{1710, author = {{Huang, Lingling and Chen, Xianzhong and Bai, Benfeng and Tan, Qiaofeng and Jin, Guofan and Zentgraf, Thomas and Zhang, Shuang}}, issn = {{2047-7538}}, journal = {{Light: Science & Applications}}, number = {{3}}, pages = {{e70--e70}}, publisher = {{Springer Nature}}, title = {{{Helicity dependent directional surface plasmon polariton excitation using a metasurface with interfacial phase discontinuity}}}, doi = {{10.1038/lsa.2013.26}}, volume = {{2}}, year = {{2013}}, } @article{13520, abstract = {{Atomistic simulations in the framework of the density functional theory have been used to model morphologic and vibrational properties of lithium niobate–lithium tantalate mixed crystals as a function of the [Nb]/[Ta] ratio. Structural parameters such as the crystal volume and the lattice parameters a and c vary roughly linearly from LiTaO3 to LiNbO3, showing only minor deviations from the Vegard behavior. Our ab initio calculations demonstrate that the TO1, TO2 and TO4 vibrational modes become harder with increasing Nb concentration. TO3 becomes softer with increasing Nb content, instead. Furthermore, the investigated zone center A1 -TO phonon modes are characterized by a pronounced stoichiometry dependence. Frequency shifts as large as 30 cm−1 are expected as the [Nb]/[Ta] ratio grows from 0 to 1. Therefore, spectroscopic techniques sensitive to the A1 modes (such as Raman spectroscopy), can be employed for a direct and non-destructive determination of the crystal composition.}}, author = {{Sanna, Simone and Riefer, A. and Neufeld, Sergej and Schmidt, Wolf Gero and Berth, Gerhard and Rüsing, Michael and Widhalm, A. and Zrenner, Artur}}, issn = {{0015-0193}}, journal = {{Ferroelectrics}}, keywords = {{Ferroelectrics, vibrational properties, LiNbO3, LiTaO3, mixed crystals}}, number = {{1}}, pages = {{63--68}}, title = {{{Vibrational Fingerprints of LiNbO3-LiTaO3Mixed Crystals}}}, doi = {{10.1080/00150193.2013.821893}}, volume = {{447}}, year = {{2013}}, } @article{39717, author = {{Lorenz, Alexander and Zimmermann, Natalie and Kumar, Satyendra and Evans, Dean R. and Cook, Gary and Martínez, Manuel Fernández and Kitzerow, Heinz-Siegfried}}, issn = {{1559-128X}}, journal = {{Applied Optics}}, keywords = {{Atomic and Molecular Physics, and Optics, Engineering (miscellaneous), Electrical and Electronic Engineering}}, number = {{22}}, publisher = {{The Optical Society}}, title = {{{X-ray scattering of nematic liquid crystal nanodispersion with negative dielectric anisotropy [Invited]}}}, doi = {{10.1364/ao.52.0000e1}}, volume = {{52}}, year = {{2013}}, } @article{39715, author = {{Nordendorf, Gaby and Lorenz, Alexander and Hoischen, Andreas and Schmidtke, Jürgen and Kitzerow, Heinz-Siegfried and Wilkes, David and Wittek, Michael}}, issn = {{0021-8979}}, journal = {{Journal of Applied Physics}}, keywords = {{General Physics and Astronomy}}, number = {{17}}, publisher = {{AIP Publishing}}, title = {{{Hysteresis and memory factor of the Kerr effect in blue phases}}}, doi = {{10.1063/1.4828477}}, volume = {{114}}, year = {{2013}}, } @inproceedings{39712, author = {{Schmidtke, Juergen and Lu, Lu and Kitzerow, Heinz-Siegfried and Terentjev, Eugene M.}}, booktitle = {{SPIE Proceedings}}, editor = {{Chien, Liang-Chy and Broer, Dick J. and Chigrinov, Vladimir and Yoon, Tae-Hoon}}, issn = {{0277-786X}}, publisher = {{SPIE}}, title = {{{Liquid crystal lasers: recent advances}}}, doi = {{10.1117/12.2008373}}, year = {{2013}}, } @article{39720, abstract = {{ We examine for the first time how chemically and thermally stable gold nanoparticles (NPs), prepared by a silane conjugation approach, affect both the thermal and the electro-optical properties of a nematic liquid crystal (LC), when doped at concentrations ranging from 0.25 to 7.5 wt%. We find that the octadecylsilane-conjugated gold NPs stabilize both the enantiotropic nematic and the monotropic smectic-A phases of the LC host with a maximum stabilization of 2 ° C for the nematic and 3.5 ° C for the smectic-A phases for the mixture containing 1 wt% of the silanized particles. The same mixture shows the lowest values for the Fréedericksz transition threshold voltage and the highest value for the dielectric anisotropy. Generally, all NP-containing mixtures, except mixtures with NP concentrations exceeding 5 wt%, reduce the threshold voltage, increase the dielectric anisotropy and reduce both rise and decay time; the latter particularly at temperatures at least 10 ° C below the isotropic–nematic phase transition on cooling. }}, author = {{Mirzaei, Javad and Urbanski, Martin and Kitzerow, Heinz-Siegfried and Hegmann, Torsten}}, issn = {{1364-503X}}, journal = {{Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences}}, keywords = {{General Physics and Astronomy, General Engineering, General Mathematics}}, number = {{1988}}, publisher = {{The Royal Society}}, title = {{{Hydrophobic gold nanoparticles via silane conjugation: chemically and thermally robust nanoparticles as dopants for nematic liquid crystals}}}, doi = {{10.1098/rsta.2012.0256}}, volume = {{371}}, year = {{2013}}, } @article{39719, author = {{Vollbrecht, Joachim and Kasdorf, Olga and Quiring, Viktor and Suche, Hubertus and Bock, Harald and Kitzerow, Heinz-Siegfried}}, issn = {{0003-6951}}, journal = {{Applied Physics Letters}}, keywords = {{Physics and Astronomy (miscellaneous)}}, number = {{4}}, publisher = {{AIP Publishing}}, title = {{{Microresonator-enhanced electroluminescence of an organic light emitting diode based on a columnar liquid crystal}}}, doi = {{10.1063/1.4816425}}, volume = {{103}}, year = {{2013}}, } @inproceedings{4039, abstract = {{We perform experiments on resonant second-harmonic generation from planar gold split-ring-resonator arrays under normal incidence of light as a function of the lattice constant. Optimum nonlinear conversion occurs at intermediate lattice constants.}}, author = {{Niesler, Fabian B. and Linden, Stefan and Förstner, Jens and Grynko, Yevgen and Meier, Torsten and Wegener, Martin}}, booktitle = {{Conference on Lasers and Electro-Optics 2012}}, isbn = {{9781557529435}}, keywords = {{tet_topic_shg, tet_topic_meta}}, location = {{San Jose, California United States}}, number = {{1}}, publisher = {{OSA}}, title = {{{Collective effects in second-harmonic generation from split-ring-resonator arrays}}}, doi = {{10.1364/qels.2012.qth3e.2}}, volume = {{109}}, year = {{2013}}, }