@article{ŠopikLipavskyMaenneletal.2011, author = {Šop{\´i}k, B. and Lipavsky, P. and M{\"a}nnel, M. and Morawetz, K.}, title = {Conserving T-matrix theory of superconductivity}, series = {arXiv:0906.3677}, journal = {arXiv:0906.3677}, pages = {14}, year = {2011}, language = {en} } @article{ZylaSurkampGurevichetal.2020, author = {Zyla, Gordon and Surkamp, Nils and Gurevich, Evgeny L and Esen, Cemal and Klehr, Andreas and Knigge, Andrea and Hofmann, Matin R and Ostendorf, Andreas}, title = {Two-photon polymerization with diode lasers emitting ultrashort pulses with high repetition rate}, series = {Optics Letters}, volume = {45}, journal = {Optics Letters}, number = {17}, doi = {10.1364/OL.401738}, pages = {4827 -- 4830}, year = {2020}, abstract = {In this Letter, we investigate the resolution of two-photon polymerization (2PP) with an amplified mode-locked external cavity diode laser with adjustable pulse length and a high repetition rate. The experimental results are analyzed with a newly developed 2PP model. Even with low pulse peak intensity, the produced structural dimensions are comparable to those generated by traditional 2PP laser sources. Thus, we show that a compact monolithic picosecond laser diode without amplification and with a repetition rate in the GHz regime can also be applied for 2PP. These results show the high application potential of compact mode-locked diode lasers for low-cost and compact 2PP systems.}, language = {en} } @article{ZylaKovalevHeisterkampetal.2019, author = {Zyla, Gordon and Kovalev, Alexander and Heisterkamp, Silas and Esen, Cemal and Gurevich, Evgeny L. and Gorb, Stanislav and Ostendorf, Andreas}, title = {Biomimetic structural coloration with tunable degree of angle-independence generated by two-photon polymerization}, series = {Opt. Materials Express}, volume = {9}, journal = {Opt. Materials Express}, pages = {2630 -- 2639}, year = {2019}, language = {en} } @article{ZylaKovalevGurevichetal.2020, author = {Zyla, Gordon and Kovalev, Alexander and Gurevich, Evgeny L and Esen, Cemal and Liu, Ying and Lu, Yongfeng and Gorb, Stanislav and Ostendorf, Andreas}, title = {Structural colors with angle-insensitive optical properties generated by Morpho-inspired 2PP structures}, series = {Applied Physics A}, volume = {126}, journal = {Applied Physics A}, number = {9}, doi = {10.1007/s00339-020-03931-6}, pages = {740 -- 740}, year = {2020}, abstract = {This paper describes how two-photon polymerization was used to generate biomimetic nanostructures with angle-insensitive coloration inspired by the blue butterflies of Morpho. Less angle dependence was achieved by engineering the structures with a certain degree of disorder, which delimited them from classical photonic crystals. Variations in the processing parameters enabled the color hue to be controlled. In this context, blue, green, yellow, and brown structures were demonstrated. Reflection spectra of the structures were simulated and studied experimentally in a broad range of incident angles. Additionally, a molding technique was performed as a potential scale-up strategy. The application of such biomimetic structures is discussed.}, language = {en} } @article{ZylaKovalevGrafenetal.2017, author = {Zyla, Gordon and Kovalev, Alexander and Grafen, Markus and Gurevich, Evgeny L. and Esen, Cemal and Ostendorf, Andreas and Gorb, Stanislav}, title = {Generation of bioinspired structural colors via two-photon polymerization}, series = {Scientific Reports}, volume = {7}, journal = {Scientific Reports}, pages = {17622}, year = {2017}, language = {en} } @article{ZybinKuritsynGurevichetal.2010, author = {Zybin, A. and Kuritsyn, Yu. A. and Gurevich, E. L. and Temchura, V. V. and {\"U}eberla, K. and Niemax, K.}, title = {Real-time Detection of Single Immobilized Nanoparticles by Surface Plasmon Resonance Imaging}, series = {Plasmonics}, volume = {5}, journal = {Plasmonics}, issn = {1557-1955}, doi = {10.1007/s11468-009-9111-5}, pages = {31 -- 35}, year = {2010}, abstract = {In this manuscript, a new approach in surface plasmon resonance microscopy is presented. The method provides optical real-time detection of single nanoparticles on surfaces. The potential of the method is demonstrated recording spherical dielectric particles as small as 40 nm in diameter and single HIV virus-like particles having diameters of similar to 100 nm both immobilized on functionalized surfaces. The surface plasmon resonance signal in the binding spots was found to be almost linearly proportional to the size of the particles and, therefore, surpasses the intensity of Mie scattering on spherical particle (dependence similar to r(-6)) by orders of magnitude for small objects. The physical reason leading to this strong effect is discussed.}, language = {en} } @article{ZaninGurevichMoskalenkoetal.2004, author = {Zanin, A. L. and Gurevich, E. L. and Moskalenko, A. S. and Bodeker, H. U. and Purwins, H.-G.}, title = {Rotating hexagonal pattern in a dielectric barrier discharge system}, series = {Phys. Rev. E}, volume = {70}, journal = {Phys. Rev. E}, issn = {1063-651X}, doi = {10.1103/PhysRevE.70.036202}, pages = {036202}, year = {2004}, language = {en} } @article{ZaharkoOppeneerGrimmeretal.2002, author = {Zaharko, O. and Oppeneer, P. M. and Grimmer, H. and Horisberger, M. and Mertins\, H.-Ch. and Abramsohn, D. and Sch{\"a}fers, F. and Bill, A. and Braun, H.-B.}, title = {Exchange Coupling in Fe/NiO/Co Film Studied by Soft X--Ray Resonant Magnetic Reflectivity}, series = {Physical Review B}, volume = {66}, journal = {Physical Review B}, pages = {134406}, year = {2002}, language = {mul} } @misc{ZaharkoGrimmerMertinsetal.1999, author = {Zaharko, O. and Grimmer, H. and Mertins, H.-Ch. and Sch{\"a}fers, F.}, title = {Soft X--Ray Magnetic Dichroism in R{1-x}x Amorphous Films (R=Rare Earth, M=Co, Fe), 18. IUC Congress, 4.8. -- 13.8. 1999, Glasgow, Scottland}, year = {1999}, language = {mul} } @article{ZaharkoCervellinoMertinsetal.2001, author = {Zaharko, O. and Cervellino, A. and Mertins, H.-Ch. and Grimmer, H. and Sch{\"a}fers, F. and Arvanitis, D.}, title = {Soft X--Ray Magnetic Circular Dichroism in Fe and Fe{0.5}Co{0.48}Films: quantitative Analysis of Transmission}, series = {Euro. Phys. J. B}, volume = {23}, journal = {Euro. Phys. J. B}, pages = {441 -- - 448}, year = {2001}, language = {en} } @article{YingFischerHoelscher2009, author = {Ying, Y. and Fischer, D. and H{\"o}lscher, U.}, title = {Electromagnetic Interference with RFID Readers in Hospitals; Proceedings 43. Jahrestagung DGBMT, 2009}, series = {Biomedizinische Technik}, journal = {Biomedizinische Technik}, number = {54}, year = {2009}, language = {en} } @article{YangSeikatHoelscher2005, author = {Yang, Z. and Seikat, K. and H{\"o}lscher, U.}, title = {Development of a bipolar forceps prototype for electrosurgical ablation procedures in the cardiac atrium for the intraoperative treatment of atrial fibrillation}, series = {Biomedizinische Technik}, volume = {50}, journal = {Biomedizinische Technik}, number = {1}, pages = {1476 -- 1478}, year = {2005}, language = {en} } @article{XiaoGurevichOstendorf2012, author = {Xiao, S. and Gurevich, E. L. and Ostendorf, A.}, title = {Incubation effect and its influence on laser patterning of ITO thin film}, series = {Appl. Phys. A}, volume = {107}, journal = {Appl. Phys. A}, pages = {333 -- 338}, year = {2012}, language = {en} } @article{WollbrinkDobelSalvariaetal.2019, author = {Wollbrink, Andreas and Dobel, Christian and Salvaria, Vasiliki and Paraskevopoulosb, Evangelos and Kisker, Christian and Mittmann, Karin and Pantev, Christo}, title = {Choice of test stimulus matters for pitch matching performance:Comparison between pure tone and narrow band noise}, series = {Hearing Research}, volume = {381}, journal = {Hearing Research}, number = {107776}, doi = {10.1016/j.heares.2019.107776}, pages = {1 -- 11}, year = {2019}, language = {en} } @inproceedings{WittrockWelp2006, author = {Wittrock, Ulrich and Welp, Petra}, title = {Adaptive laser resonator control with deformable MOEMS mirrors}, series = {MEMS/MOEMS Components and Their Applications III, Proc. SPIE}, volume = {6113}, booktitle = {MEMS/MOEMS Components and Their Applications III, Proc. SPIE}, publisher = {SPIE}, doi = {10.25974/fhms-653}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-6537}, pages = {61130C}, year = {2006}, abstract = {Adaptive laser resonators with deformable MOEMS mirrors under closed-loop control are discussed and experimental results are presented. The requirements for deformable mirrors and for closed-loop control systems of these mirrors are analyzed. Several deformable mirrors have been characterized and the results are presented. Currently available membrane mirrors deform under laser load and need further development before they can be used for aberration correction of solid state lasers above some tens of Watts. Nevertheless, the results are encouraging and the requirements are within reach of currently available technology. Finally, we demonstrate an Nd.YVO4-laser with a closed-loop adaptive resonator and more than 6 W of output power. The closed-loop system was able to compensate artificially introduced aberrations from a phase plate.}, language = {de} } @article{WittrockVorholt2015, author = {Wittrock, Ulrich and Vorholt, Christian}, title = {Spatial hole burning in Yb:YAG thin-disk lasers}, series = {Appl. Phys. B}, volume = {120}, journal = {Appl. Phys. B}, doi = {10.25974/fhms-823}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-8234}, pages = {711 -- 721}, year = {2015}, abstract = {The spatially varying intensity in a standing wave resonator leads to spatial hole burning in the gain medium of a laser. The spatial hole burning changes the gain of different longitudinal modes and can thus determine the optical spectrum of the laser. We simulate this longitudinal mode competition in standing wave resonators of thin-disk lasers. The resulting optical spectra of the laser are compared to measured optical spectra. We examine two types of resonators: I-resonators and V-resonators with different angles of incidence. In V-resonators, the non-normal incidence of the laser beam on the disk lifts the degeneracy of the polarization. Experiments show that the slight gain advantage for the p-polarization does not lead to polarized emission. For both types of resonators, the measured spectra are in good agreement with the simulated ones. The simulations allow to study the influence of spectral intra-cavity losses on the optical spectrum of a thin-disk laser.}, language = {en} } @article{Wittrock2010, author = {Wittrock, Ulrich}, title = {Laryngeally echolocating bats (Brief Communication Arising)}, series = {Nature}, volume = {466}, journal = {Nature}, doi = {10.1038/nature09156}, pages = {E6}, year = {2010}, language = {mul} } @article{Wittrock2014, author = {Wittrock, Ulrich}, title = {Grenzen? Welche Grenzen? Prof. Ulrich Wittrock, Leiter des Labors f{\"u}r Photonik an der Fachhochschule M{\"u}nster, fragt nach den ultimativen Grenzen der Lasertechnik}, series = {Laser Community - das Lasermagazin von Trumpf}, volume = {02:14}, journal = {Laser Community - das Lasermagazin von Trumpf}, year = {2014}, language = {de} } @article{Wittrock2014, author = {Wittrock, Ulrich}, title = {Limitations? What Limitations? Prof. Ulrich Wittrock, head of the Photonics Laboratory at the M{\"u}nster University of Applied Sciences, seeks out the ultimate boundaries of laser technology}, series = {Laser Community - the laser magazine from Trumpf}, volume = {02:14}, journal = {Laser Community - the laser magazine from Trumpf}, year = {2014}, language = {en} } @inproceedings{WilmingRiedl2019, author = {Wilming, Heinrich and Riedl, Alexander}, title = {TA Luft - Chance zur regelwerks{\"u}bergreifenden Standardisierung dichter Flanschverbindungen}, series = {XXI. Dichtungskolloquium}, booktitle = {XXI. Dichtungskolloquium}, publisher = {FH M{\"u}nster}, address = {M{\"u}nster}, pages = {41 -- 48}, year = {2019}, language = {de} }