@article{SchaalRutlohWeidenfeldetal.2018,
  author    = {Schaal, Frederik and Rutloh, Michael and Weidenfeld, Susanne and Stumpe, Joachim and Michler, Peter and Pruss, Christof and Osten, Wolfgang},
  title     = {Optically addressed modulator for tunable spatial polarization control},
  series = {Optics express : the international electronic journal of optics},
  volume    = {26},
  journal   = {Optics express : the international electronic journal of optics},
  number    = {21},
  publisher = {Optical Society of America},
  address   = {Washington},
  issn      = {1094-4087},
  doi       = {10.1364/OE.26.028119},
  pages     = {28119 -- 28130},
  year      = {2018},
  abstract  = {We present an optically addressed non-pixelated spatial light modulator. The system is based on reversible photoalignment of a LC cell using a red light sensitive novel azobenzene photoalignment layer. It is an electrode-free device that manipulates the liquid crystal orientation and consequently the polarization via light without artifacts caused by electrodes. The capability to miniaturize the spatial light modulator allows the integration into a microscope objective. This includes a miniaturized 200 channel optical addressing system based on a VCSEL array and hybrid refractive-diffractive beam shapers. As an application example, the utilization as a microscope objective integrated analog phase contrast modulator is shown. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement},
  language  = {en}
}
@misc{SchaalRutlohWeidenfeldetal.2018,
  author    = {Schaal, Frederik and Rutloh, Michael and Weidenfeld, Susanne and Stumpe, Joachim and Michler, Peter and Pruss, Christof and Osten, Wolfgang},
  title     = {Optically addressed modulator for tunable spatial polarization control},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {1001},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-44626},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-446263},
  pages     = {28119 -- 28130},
  year      = {2018},
  abstract  = {We present an optically addressed non-pixelated spatial light modulator. The system is based on reversible photoalignment of a LC cell using a red light sensitive novel azobenzene photoalignment layer. It is an electrode-free device that manipulates the liquid crystal orientation and consequently the polarization via light without artifacts caused by electrodes. The capability to miniaturize the spatial light modulator allows the integration into a microscope objective. This includes a miniaturized 200 channel optical addressing system based on a VCSEL array and hybrid refractive-diffractive beam shapers. As an application example, the utilization as a microscope objective integrated analog phase contrast modulator is shown. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement},
  language  = {en}
}
@article{StumpeSakhnoGritsaietal.2014,
  author    = {Stumpe, Joachim and Sakhno, O. and Gritsai, Y. and Rosenhauer, R. and Fischer, Th. and Rutloh, Michael and Schaal, F. and Weidenfeld, S. and Jetter, M. and Michler, P. and Pruss, C. and Osten, W.},
  title     = {Active and passive LC based polarization elements},
  series = {Molecular crystals and liquid crystals},
  volume    = {594},
  journal   = {Molecular crystals and liquid crystals},
  number    = {1},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {1542-1406},
  doi       = {10.1080/15421406.2014.917503},
  pages     = {140 -- 149},
  year      = {2014},
  abstract  = {Passive and active polarization elements were created by surface and bulk photo-alignment of LCs, reactive LCs, photo-sensitive LCP and photo-curable monomer/LC composites. The use of different photo-sensitive liquid crystalline materials for the development of highly anisotropic elements with high spatial resolution and stability or, alternatively, fast switch ability will be discussed. Photo-active and voltage tunable polarization and diffraction elements are presented. For active micro-optic application a photo-addressed patterned retarder was created. Electrically switchable diffraction gratings were generated by interference exposure of photo-curable LC composites at room temperature characterized by droplet free morphology. These polarization sensitive diffraction elements are characterized be excellent optical properties and low switching times.},
  language  = {en}
}
@article{ShubchynskyyBonieckaSchweighoferetal.2017,
  author    = {Shubchynskyy, Volodymyr and Boniecka, Justyna and Schweighofer, Alois and Simulis, Justinas and Kvederaviciute, Kotryna and Stumpe, Michael and Mauch, Felix and Balazadeh, Salma and M{\"u}ller-R{\"o}ber, Bernd and Boutrot, Freddy and Zipfel, Cyril and Meskiene, Irute},
  title     = {Protein phosphatase AP2C1 negatively regulates basal resistance and defense responses to Pseudomonas syringae},
  series = {Journal of experimental botany},
  volume    = {68},
  journal   = {Journal of experimental botany},
  number    = {5},
  publisher = {Oxford Univ. Press},
  address   = {Oxford},
  issn      = {0022-0957},
  doi       = {10.1093/jxb/erw485},
  pages     = {1169 -- 1183},
  year      = {2017},
  abstract  = {Mitogen-activated protein kinases (MAPKs) mediate plant immune responses to pathogenic bacteria. However, less is known about the cell autonomous negative regulatory mechanism controlling basal plant immunity. We report the biological role of Arabidopsis thaliana MAPK phosphatase AP2C1 as a negative regulator of plant basal resistance and defense responses to Pseudomonas syringae. AP2C2, a closely related MAPK phosphatase, also negatively controls plant resistance. Loss of AP2C1 leads to enhanced pathogen-induced MAPK activities, increased callose deposition in response to pathogen-associated molecular patterns or to P. syringae pv. tomato (Pto) DC3000, and enhanced resistance to bacterial infection with Pto. We also reveal the impact of AP2C1 on the global transcriptional reprogramming of transcription factors during Pto infection. Importantly, ap2c1 plants show salicylic acid-independent transcriptional reprogramming of several defense genes and enhanced ethylene production in response to Pto. This study pinpoints the specificity of MAPK regulation by the different MAPK phosphatases AP2C1 and MKP1, which control the same MAPK substrates, nevertheless leading to different downstream events. We suggest that precise and specific control of defined MAPKs by MAPK phosphatases during plant challenge with pathogenic bacteria can strongly influence plant resistance.},
  language  = {en}
}