@inbook{57013,
  author       = {{Frischemeier, Daniel and Biehler, Rolf}},
  booktitle    = {{Proceedings of the Ninth Congress of the European Society for Research in Mathematics Education (CERME9)}},
  editor       = {{Krainer, K. and Vondrova, N.}},
  pages        = {{643–650}},
  publisher    = {{Charles University in Prague, Faculty of Education and ERME}},
  title        = {{{Preservice teachers’ statistical reasoning when comparing groups facilitated by software}}},
  year         = {{2015}},
}

@inbook{57052,
  author       = {{Kuzle, Ana and Biehler, Rolf}},
  booktitle    = {{Proceedings of the Ninth Conference of the European Society for Research in Mathematics Education (CERME9, 4-8 February 2015)}},
  editor       = {{Krainer, K. and Vondrová, N.}},
  pages        = {{2847–2853}},
  publisher    = {{Charles University in Prague, Faculty of Education and ERME}},
  title        = {{{A protocol for analysing mathematics teacher educators’ practices}}},
  year         = {{2015}},
}

@inbook{57054,
  author       = {{Lünne, Steffen and Biehler, Rolf and Schüler, Sven and Rösken-Winter, Bettina}},
  booktitle    = {{Beiträge zum Mathematikunterricht 2015, Band 2}},
  editor       = {{Calouri, F. and Linneweber-Lammerskitten, H. and Streit, C.}},
  pages        = {{604--607}},
  publisher    = {{WTM-Verlag}},
  title        = {{{Mathematikbezogene Beliefs fachfremd unterrichtender Lehrerinnen und Lehrer zu Beginn einer Qualifizierungsmaßnahme}}},
  year         = {{2015}},
}

@inbook{57053,
  author       = {{Lünne, Steffen and Biehler, Rolf}},
  booktitle    = {{Beiträge zum Mathematikunterricht 2015, Band 2}},
  editor       = {{Calouri, F. and Linneweber-Lammerskitten, H. and Streit, C.}},
  pages        = {{608--611}},
  publisher    = {{WTM-Verlag}},
  title        = {{{FfuntOWL: Qualifizierung fachfremd Mathematik unterrichtender Lehrerinnen und Lehrer im Regierungsbezirk Detmold (NRW)}}},
  year         = {{2015}},
}

@inbook{57055,
  author       = {{Mai, Tobias and Biehler, Rolf}},
  booktitle    = {{Beiträge zum Mathematikunterricht 2015, Band 2}},
  editor       = {{Calouri, F. and Linneweber-Lammerskitten, H. and Streit, C.}},
  pages        = {{612--615}},
  publisher    = {{WTM-Verlag}},
  title        = {{{eVEMINT-Eine multimediale Unterstützung zum Einstieg in selbstreguliertes Lernen mit digitalen Vorkursmaterialien}}},
  year         = {{2015}},
}

@article{59691,
  abstract     = {{Injecting spin-polarized carriers into semiconductor lasers provides important opportunities to extend what is known about spintronic devices, as well as to overcome many limitations of conventional (spin-unpolarized) lasers. By developing a microscopic model of spin-dependent optical gain derived from an accurate electronic structure in a quantum-well-based laser, we study how its operation properties can be modified by spin-polarized carriers, carrier density, and resonant cavity design. We reveal that by applying a uniaxial strain, it is possible to attain a large birefringence. While such birefringence is viewed as detrimental in conventional lasers, it could enable fast polarization oscillations of the emitted light in spin lasers, which can be exploited for optical communication and high-performance interconnects. The resulting oscillation frequency (>200 GHz) would significantly exceed the frequency range possible in conventional lasers.}},
  author       = {{Faria Junior, Paulo E. and Xu, Gaofeng and Lee, Jeongsu and Gerhardt, Nils Christopher and Sipahi, Guilherme M. and Žutić, Igor}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  number       = {{7}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Toward high-frequency operation of spin lasers}}},
  doi          = {{10.1103/physrevb.92.075311}},
  volume       = {{92}},
  year         = {{2015}},
}

@misc{13896,
  author       = {{Olfert, Sergei and Henning, Bernd}},
  isbn         = {{978-3-939296-08-9}},
  pages        = {{1560--1561}},
  publisher    = {{Deutsche Gesellschaft für Akustik e.V}},
  title        = {{{Schallfeldcharakterisierung mittels Schlierentechnik}}},
  year         = {{2015}},
}

@article{59693,
  abstract     = {{Injecting spin-polarized carriers into semiconductor lasers provides important opportunities to extend what is known about spintronic devices, as well as to overcome many limitations of conventional (spin-unpolarized) lasers. By developing a microscopic model of spin-dependent optical gain derived from an accurate electronic structure in a quantum-well-based laser, we study how its operation properties can be modified by spin-polarized carriers, carrier density, and resonant cavity design. We reveal that by applying a uniaxial strain, it is possible to attain a large birefringence. While such birefringence is viewed as detrimental in conventional lasers, it could enable fast polarization oscillations of the emitted light in spin lasers, which can be exploited for optical communication and high-performance interconnects. The resulting oscillation frequency (>200 GHz) would significantly exceed the frequency range possible in conventional lasers.}},
  author       = {{Faria Junior, Paulo E. and Xu, Gaofeng and Lee, Jeongsu and Gerhardt, Nils Christopher and Sipahi, Guilherme M. and Žutić, Igor}},
  issn         = {{1098-0121}},
  journal      = {{Physical Review B}},
  number       = {{7}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Toward high-frequency operation of spin lasers}}},
  doi          = {{10.1103/physrevb.92.075311}},
  volume       = {{92}},
  year         = {{2015}},
}

@inproceedings{64444,
  author       = {{Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin and Pusch, Tobias and Michalzik, Rainer}},
  booktitle    = {{The European Conference on Lasers and Electro-Optics 2015}},
  title        = {{{Tu­ning the fre­quen­cy of po­la­riza­t­i­on oscil­la­ti­ons in spin VC­SELs by me­cha­ni­cal strain in­duc­tion in GHz-ran­ge}}},
  year         = {{2015}},
}

@inproceedings{64441,
  author       = {{Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin and Pusch, T. and Michalzik, Rainer}},
  booktitle    = {{The European Conference on Lasers and Electro-Optics 2015}},
  title        = {{{Increasing the birefringence of VCSELs beyond 250 GHz}}},
  year         = {{2015}},
}

@unpublished{64442,
  author       = {{Schellenberg, Falk and Finkeldey, Markus and Richter, Bastian and Gerhardt, Nils Christopher and Hofmann, Martin R. and Paar, Christof and Schäpers, Maximilian}},
  title        = {{{On the complexity reduction of laser fault injection campaigns using OBIC measurements}}},
  year         = {{2015}},
}

@article{64430,
  author       = {{Ad­in­da-Oug­ba, Adamou and Koukourakis, Nektarios and Gerhardt, Nils Christopher and Hofmann, Martin}},
  journal      = {{Current directions in biomedical engineering}},
  number       = {{1}},
  pages        = {{261 -- 264}},
  title        = {{{Simple concept for a wide-field lensless digital holographic microscope using a laser diode}}},
  doi          = {{10.1515/cdbme-2015-0065}},
  volume       = {{1}},
  year         = {{2015}},
}

@inproceedings{64432,
  author       = {{Cherkashin, Maxim N. and Brenner, Carsten and Schnitzler, Lena and Döpke, Benjamin and Gerhardt, Nils Christopher and Hofmann, Martin}},
  booktitle    = {{Opto-acoustic methods and applications in biophotonics II}},
  title        = {{{Laser-diode-based photoacoustic setup to analyze Grüneisen relaxation-effect induced signal enhancement}}},
  doi          = {{10.1117/12.2183957}},
  year         = {{2015}},
}

@inproceedings{64436,
  author       = {{Lindemann, Markus and Höpfner, Henning and Gerhardt, Nils Christopher and Hofmann, Martin R. and Pusch, Tobias and Michalzik, Rainer}},
  booktitle    = {{Vertical-cavity surface-emitting lasers XIX}},
  pages        = {{1 -- 7}},
  title        = {{{Ultrafast polarization dynamics with controlled polarization oscillations in vertical-cavity surface-emitting lasers}}},
  doi          = {{10.1117/12.2076920}},
  year         = {{2015}},
}

@inproceedings{64443,
  author       = {{Lindemann, Markus and Höpfner, Henning and Gerhardt, Nils Christopher and Hofmann, Martin R. and Pusch, Tobias and Michalzik, Rainer}},
  booktitle    = {{Spintronics VIII}},
  title        = {{{Towards high frequency operation of polarization oscillations in spin vertical-cavity surface-emitting lasers}}},
  doi          = {{10.1117/12.2197969}},
  year         = {{2015}},
}

@article{64435,
  author       = {{Lindemann, Markus and Höpfner, Henning and Gerhardt, Nils Christopher and Hofmann, Martin and Pusch, Tobias and Michalzik, Rainer}},
  journal      = {{79. Jahrestagung der DPG und DPG-Frühjahrstagung}},
  title        = {{{Controlling the frequency of ultra-fast polarization oscillations in Spin-VCSELs}}},
  year         = {{2015}},
}

@inproceedings{64440,
  author       = {{Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin R. and Pusch, T. and Michalzik, R.}},
  title        = {{{Tuning the frequency of polarization oscillations in spin-VCSELs by mechanical strain induction}}},
  year         = {{2015}},
}

@inproceedings{64437,
  author       = {{Lindemann, Markus and Gerhardt, Nils Christopher and Hofmann, Martin R. and Pusch, T. and Michalzik, R.}},
  title        = {{{Increasing the birefringence of VCSELs beyond 250 GHz}}},
  year         = {{2015}},
}

@inproceedings{64429,
  author       = {{Ad­in­da-Oug­ba, Adamou and Koukourakis, Nektarios and Mitschker, Felix and Gerhardt, Nils Christopher and Hofmann, Martin and Kabir, Behzad}},
  booktitle    = {{Optical systems design 2015}},
  pages        = {{1 -- 8}},
  title        = {{{Compact low-cost lensless digital holographic microscope for topographic measurements of microstructures in reflection geometry}}},
  doi          = {{10.1117/12.2191073}},
  year         = {{2015}},
}

@inproceedings{64433,
  author       = {{Ad­in­da-Oug­ba, Adamou and Koukourakis, Nektarios and Essaidi, Aissam and Gerhardt, Nils Christopher and Hofmann, Martin}},
  booktitle    = {{Optical methods for inspection, characterization, and imaging of biomaterials II}},
  pages        = {{952903}},
  title        = {{{Quantitative phase imaging by wide field lensless digital holographic microscope}}},
  doi          = {{10.1117/12.2184471}},
  year         = {{2015}},
}