@inproceedings{WagnerOstendorfGrahmannetal., author = {Wagner, J. and Ostendorf, Ralf and Grahmann, Jan and Merten, A. and Hugger, S. and Jarvis, J.-P. and Fuchs, F. and Boscovic, D. and Schenk, Harald}, title = {Widely tunable quantum cascade lasers for spectroscopic sensing}, series = {Quantum sensing and nanophotonic devices XII, 8 - 12 February 2015, San Francisco, California, United States}, booktitle = {Quantum sensing and nanophotonic devices XII, 8 - 12 February 2015, San Francisco, California, United States}, editor = {Razeghi, Manijeh}, publisher = {SPIE}, address = {Bellingham, Wash.}, isbn = {978-1-62841-460-8}, pages = {937012-1 -- 937012-6}, language = {en} } @misc{LehnenHeuserSağlametal., author = {Lehnen, Nadine and Heuser, Fabian and Sağlam, Murat and Schulz, Christian M. and Wagner, Klaus J. and Taki, Masakatsu and Kochs, Eberhard F. and Jahn, Klaus and Schneider, Erich}, title = {Opioid-induced nausea involves a vestibular problem preventable by head-rest}, series = {PLoS one}, volume = {10}, journal = {PLoS one}, number = {8}, issn = {1932-6203}, doi = {10.1371/journal.pone.0135263}, pages = {e0135263}, language = {en} } @misc{HeuserSchulzSağlametal., author = {Heuser, Fabian and Schulz, Christian and Sağlam, Murat and Ramaioli, Cecilia and Heuberger, Maria and Wagner, Klaus J. and Jahn, Klaus and Schneider, Erich and Brandt, Thomas and Glasauer, Stefan and Lehnen, Nadine}, title = {Preventing opioid-induced nausea and vomiting: Rest your head and close your eyes?}, series = {PloS one}, volume = {12}, journal = {PloS one}, number = {3}, issn = {1932-6203}, doi = {10.1371/journal.pone.0173925}, pages = {e0173925}, language = {en} } @techreport{MuellerDieterBauhusetal., author = {M{\"u}ller, J{\"o}rg and Dieter, M. and Bauhus, J. and Spellmann, H. and M{\"o}hring, B. and Wagner, S. and Wolf, Heino and Niekisch, M. and Weiger, H. and Feindt, Peter H. and Hamm, Ulrich and W{\"a}tzold, Frank and Wolters, Volkmar and Engels, Eve-Marie and Schraml, U. and Lang, F. and Pr{\"o}bstl-Haider, U. and Richter, K.}, title = {Wege zu einem effizienten Waldnaturschutz in Deutschland. Stellungnahme}, publisher = {Wissenschaftlicher Beirat Waldpolitik und Wissenschaftlicher Beirat Biodiversit{\"a}t und Genetische Ressourcen beim BMEL}, pages = {62}, language = {de} } @misc{SteuerLiedkeButterlingetal., author = {Steuer, O. and Liedke, Maciej O. and Butterling, M. and Schwarz, D. and Schulze, J. and Li, Z. and Wagner, A. and Fischer, Inga Anita and H{\"u}bner, R. and Zhou, S.}, title = {Evolution of point defects in pulsed-laser-melted Ge1-xSnx probed by positron annihilation lifetime spectroscopy}, series = {Journal of Physics: Condensed Matter}, volume = {36}, journal = {Journal of Physics: Condensed Matter}, number = {8}, issn = {0953-8984}, doi = {10.1088/1361-648X/ad0a10}, pages = {1 -- 11}, abstract = {Direct-band-gap Germanium-Tin alloys (Ge1-xSnx) with high carrier mobilities are promising materials for nano- and optoelectronics. The concentration of open volume defects in the alloy, such as Sn and Ge vacancies, influences the final device performance. In this article, we present an evaluation of the point defects in molecular-beam-epitaxy grown Ge1-xSnx films treated by post-growth nanosecond-range pulsed laser melting (PLM). Doppler broadening - variable energy positron annihilation spectroscopy and variable energy positron annihilation lifetime spectroscopy are used to investigate the defect nanostructure in the Ge1-xSnx films exposed to increasing laser energy density. The experimental results, supported with ATomic SUPerposition calculations, evidence that after PLM, the average size of the open volume defects increases, which represents a raise in concentration of vacancy agglomerations, but the overall defect density is reduced as a function of the PLM fluence. At the same time, the positron annihilation spectroscopy analysis provides information about dislocations and Ge vacancies decorated by Sn atoms. Moreover, it is shown that the PLM reduces the strain in the layer, while dislocations are responsible for trapping of Sn and formation of small Sn-rich-clusters.}, language = {en} } @inproceedings{BlehOstendorfMertenetal., author = {Bleh, D. and Ostendorf, Ralf and Merten, A. and Grahmann, Jan and Schenk, Harald and Kunzer, M. and Schmidt, R. and Wagner, J.}, title = {Miniaturization of a fast tunable external cavity QCL with customized gratings and MOEMS components}, series = {International Quantum Cascade Lasers School \& Workshop (IQCLSW), Policoro, Italy}, booktitle = {International Quantum Cascade Lasers School \& Workshop (IQCLSW), Policoro, Italy}, pages = {1 -- 2}, language = {en} }