PD Dr Juergen Schmidtke

Juergen Schmidtke is a researcher in the Chemistry Department at the University of Paderborn.
He is in the group of Prof. Heinz Kitzerow, investigating photonic properties of chiral liquid crystals.

Contact Information

• Department Address
  Universität Paderborn
  Fakultät für Naturwissenschaften
  Physikalische Chemie
  Warburger Str. 100
  D-33098 Paderborn
• E-mail: juergen.schmidtke@upb.de
• Phone: +49 (0)5251 60 2132
• Fax: +44 (0)5251 60 4208

Research

• Liquid crystals in general
  
  
• Photonic properties of cholesteric liquid crystals
  - fluorescence and laser emission of dye doped CLCs
  - CLC elastomers with tunable photonic bandgaps
  - photonic defect modes in CLCs
  A bibliography on photonic properties of chiral LCs can be found here (latest update: October 10, 2012).
  
  
• Liquid crystalline polymers and elastomers
  - molecular order
  - viscous and elastic properties
  
  

Previous Affiliations

• Postdoc (Supervisor: Eugene M. Terentjev): Sector of Biological and soft Systems, Cavendish Laboratory, University of Cambridge (UK)
• Postdoc (Supervisor: Harry J. Coles): Centre of Molecular Materials for Photonics and Electronics, Electrical Engineering Division, University of Cambridge (UK)
• Postdoc (Supervisor: Heino Finkelmann) : Institute for Macromolecular Chemistry, Albert-Ludwigs University, Freiburg (Germany)
• Diploma and PhD in Physics; Postdoc (Supervisor: Gert Strobl): Physics Department, Albert-Ludwigs University, Freiburg (Germany)

Publications

• A. M. Risse. J. Schmidtke, and H.-S. Kitzerow
  Dynamics of a liquid crystal-based modulator with germanium substrates for mid-infrared radiation
  Liquid Crystals 48, 1025 (2021)
  
  
• B. Zhang, K. Martens, L. Kneer, T. Funck, L. Nguyen, R. Berger, M. Dass, S. Kempter, J. Schmidtke, T. Liedl, and H.-S. Kitzerow
  DNA Origami Nano-Sheets and Nano-Rods Alter the Orientational Order in a Lyotropic Chromonic Liquid Crystal
  Nanomaterials 10, 1695 (2020)
  
  
• B. Zhang, J. Schmidtke, and H.-S. Kitzerow
  Fabrication of Lyotropic Alignment Layers for Thermotropic Liquid Crystals Facilitated by a Polymer Template
  Advanced Optical Materials 7, 1801766 (2019)
  
  
• A. M. Risse and J. Schmidtke
  Angular-Dependent Spontaneous Emission in Cholesteric Liquid-Crystal Films
  Journal of Physical Chemistry C 123, 2428 (2019)
  
  
• J. Vollbrecht, P. Oechsle, A. Stepen, F. Hoffmann, J. Paradies, T. Meyers, U. Hilleringmann, J. Schmidtke, and H. Kitzerow
  Liquid crystalline dithienothiophene derivatives for organic electronics
  Organic Electronics 61, 266 (2018)
  
  
• G. Nordendorf, J. Schmidtke, D. Wilkes, and H. Kitzerow
  Temperature-insensitive electro-optic response of polymer-stabilized blue phases
  Journal of Materials Chemistry C 5, 518 (2017)
  
  
• G. Nordendorf, A. Hoischen, J. Schmidtke, D. Wilkes, and H.-S. Kitzerow
  Polymer-stabilized blue phases: Promising mesophases for a new generation of liquid crystal displays
  Polymers for Advanced Technologies 25, 1195 (2014)
  
  
• G. Nordendorf, A. Lorenz, A. Hoischen, J. Schmidtke, H. Kitzerow, D. Wilkes, and M. Wittek
  Hysteresis and memory factor of the Kerr effect in blue phases
  Journal of Applied Physics 114, 173104 (2013)
  
  
• J. Schmidtke
  Liquid Crystal Lasers
  Proeedings of SPIE 8828, 882806 (2013)
  
  
• J. Schmidtke, L. Lu, H.-S. Kitzerow, and E. M. Terentjev
  Liquid Crystal Lasers: Recent Advances
  Proeedings of SPIE 8642, 864209 (2013)
  
  
• J. Schmidtke, G. Jünnemann, S. Keuker-Baumann, and H.-S. Kitzerow
  Electrical fine tuning of liquid crystal lasers
  Applied Physics Letters 101, 051117 (2012)
  
  
• J. Schmidtke and E. M. Terentjev
  Polydimethylsiloxane-enclosed liquid crystal lasers for lab-on-chip applications
  Applied Physics Letters 96, 151111 (2010)
  
  
• J. Schmidtke and H. J. Coles
  Elasticity-driven partial demixing in cholesteric liquid crystal films
  Phys. Rev. E 80, 011702 (2009)
  [PDF: copyright (2009) American Physical Society]
  
  
• W. Stille and J. Schmidtke
  The role of Frank elasticity in cholesteric elastomers
  Eur. Phys. J. E  22, 117 (2007)
  
  
• F. Fleischhaker, A. C. Arsenault, J. Schmidtke , R. Zentel , and G. A. Ozin
  Spin-coating of designed functional planar defects in opal film: Generalized synthesis
  Chemistry of Materials  18(24), 5640 (2006)
  
  
• C. Bourgerette, B. Chen, H. Finkelmann, M. Mitov, J. Schmidtke, and W. Stille
  Variation of the Network Anisotropy of Cholesteric Side Chain Elastomers
  Macromolecules  39, 8163, (2006)
  
  
• J. Schmidtke, S. Kniesel, and H. Finkelmann
  Probing the photonic properties of a cholesteric elastomer under biaxial stress
  Macromolecules  38, 1357, (2005)
  
  
• J. Schmidtke and W. Stille
  Photonic defect modes in cholesteric liquid crystal films
  Eur. Phys. J. E  12, 553-564 (2003)
  
  
• J. Schmidtke, W.Stille, and H. Finkelmann
  Defect Mode Emission of a Dye Doped Cholesteric Polymer Network
  Phys. Rev. Lett.  90, 083902 (2003)
  [PDF: copyright (2003) American Physical Society]
  doi:10.1103/PhysRevLett.90.083902
  
  
• J. Schmidtke and W. Stille
  Fluorescence of a dye-doped cholesteric liquid crystal film in the region of the stop band:
  theory and experiment
  Eur. Phys. J. B  31, 179-194 (2003)
  
  
• J. Schmidtke, W. Stille, H. Finkelmann, and S. T. Kim
  Laser Emission in a Dye Doped Cholesteric Polymer Network
  Adv. Mater.  14, 746-749 (2002)
  
  
• J. Schmidtke, W. Stille, and G. Strobl
  Static and Dynamic Light Scattering of a Nematic Side Group Polysiloxane
  Macromolecules  33, 2922-2928 (2000)
  
  
• G. Hauser, J. Schmidtke, G. Strobl, and T. Thurn-Albrecht
  Investigating the Mechanisms of Polymer Crystallization by SAXS Experiments
  ACS Symposium Series   739, 140-151 (2000)
  
  
• G. Hauser, J. Schmidtke, and G. Strobl
  The Role of Co-Units in Polymer Crystallization and Melting:
  New Insights from Studies on Syndiotactic Poly(propene-co-octene)
  Macromolecules  31, 6250-6258 (1998)
  
  
• J. Schmidtke, G. Strobl and T. Thurn-Albrecht
  A Four-State Scheme for Treating Polymer Crystallization and Melting Suggested by Calorimetric
  and Small Angle X-ray Scattering Experiments on Syndiotactic Polypropylene
  Macromolecules  30, 5804-5821 (1997)
  
  

Talks

• J. Schmidtke and A. M. Risse
  Angular dependent spontaneous emission in cholesteric liquid-crystal films
  SPIE Photonics West, San Francisco (February 5, 2019)
  (Invited talk)
  
  
• J. Schmidtke
  Angular dependent spontaneous emission in cholesteric liquid-crystal films
  7th Workshop on Liquid Crystals for Photonics, Jastrzebia Gora, Poland (September 21, 2018)
  
  
• J. Schmidtke
  Spontaneous Emission in Cholesteric Films: Temperature and Angular Dependence
  27th International Liquid Crystal Conference, Kyoto (July 24, 2018)
  
  
• J. Schmidtke
  Light Emission in Cholesteric Films: Temperature and Angular Dependence
  14th European Conference on Liquid Crystals, Moscow (June 27, 2017)
  
  
• J. Schmidtke
  Light Emission in Cholesteric Films: Temperature and Angular Dependence
  2nd Joint Conference of the British and German Liquid Crystal Societies, Wuerzburg (April 4, 2017)
  
  
• J. Schmidtke
  Using absorption bands for photonic band gap engineering in cholesteric liquid crystals
  6th Workshop on Liquid Crystals for Photonics, Ljubljana, Slovenia (September 14, 2016)
  
  
• J. Schmidtke
  Using absorption bands for photonic band gap engineering in cholesteric liquid crystals
  Joint Conference of the British and German Liquid Crystal Societies, Edinburgh (March 22, 2016)
  
  
• J. Schmidtke and H.-S. Kitzerow
  Field-Induced Helix Distortions in Cholesteric Liquid Crystal Films
  16th Topical Meeting on the Optics of Liquid Crystals, Sopot, Poland (September 14, 2015)
  
  
• J. Schmidtke and H.-S. Kitzerow
  Field-Induced Helix Distortions in Cholesteric Liquid Crystal Films
  13th European Conference on Liquid Crystals, Manchester (September 8, 2015)
  
  
• J. Schmidtke
  Liquid Crystal Lasers
  AG Makromolekulare Chemie und Molekulare Materialien, University of Kassel (July 10, 2015)
  
  
• J. Schmidtke and H.-S. Kitzerow
  Field-Induced Helix Distortions in Cholesteric Liquid Crystal Films
  German Liquid Crystal Conference, Stuttgart (March 5, 2015)
  
  
• J. Schmidtke and H.-S. Kitzerow
  Light-Emitting Cholesteric Films: Dye Diffusion, Dye Depletion and Helix Distortion
  5th Workshop on Liquid Crystals for Photonics, Erice, Italy (September 3, 2014)
  
  
• J. Schmidtke and H.-S. Kitzerow
  Emissive Cholesteric Films: Dye Diffusion, Dye Depletion and Helix Distortion
  25th International Liquid Crystal Conference, Dublin (July 3, 2014)
  
  
• J. Schmidtke
  Liquid Crystal Lasers
  SPIE Optics + Photonics, San Diego (Aug 25, 2013)
  (Invited talk)
  
  
• J. Schmidtke, L. Lu, and H.-S. Kitzerow
  Using Electric Fields for Fine Tuning and Performance Improvement of Liquid Crystal Lasers
  British Liquid Crystal Society Annual Meeting, Selwyn College, Cambridge (Mar 25, 2013)
  
  
• J. Schmidtke, L. Lu, H.-S. Kitzerow, and E. M. Terentjev
  Liquid Crystal Lasers: Recent Advances
  SPIE Photonics West, San Francisco (Feb 5, 2013)
  (Invited talk)
  
  
• J. Schmidtke, L. Lu, H.-S. Kitzerow, and E. M. Terentjev
  Liquid Crystal Lasers: Recent Advances
  4th Workshop on Liquid Crystals for Photonics, Hong Kong University of Science and Technology (Dec 10, 2012)
  (Invited talk)
  
  
• J. Schmidtke, L. Lu, G. Jünnemann, S. Keuker-Baumann, and H.-S. Kitzerow
  Using Electric Fields for Fine Tuning and Performance Improvement of Liquid Crystal Lasers
  13th International Symposium on Colloidal and Molecular Electrooptics (ELOPTO), Gent, Belgium (Sept 5, 2012)
  
  
• J. Schmidtke, L. Lu, G. Jünnemann, S. Keuker-Baumann, and H.-S. Kitzerow
  Using Electric Fields for Fine Tuning and Performance Improvement of Liquid Crystal Lasers
  24th International Liquid Crystal Conference, Mainz, Germany (Aug 23, 2012)
  
  
• J. Schmidtke
  Flüssigkristall-Laser
  Physikalisches Kolloqium, Universität Paderborn (Apr 14, 2011)
  
  
• J. Schmidtke, C. Mowatt, and H. J. Coles
  Beam Characteristics of Liquid Crystal Lasers
  German Liquid Crystal Conference, Hamburg (Mar 30, 2011)
  
  
• J. Schmidtke
  Liquid Crystal Lasers
  Center for Optoelectronics and Photonics, University of Paderborn (Apr 14, 2010)
  
  
• J. Schmidtke and E. M. Terentjev
  PDMS-Enclosed Liquid Crystal Lasers for Lab-On-Chip Applications
  Spring Meeting of the German Physical Society, Regensburg (Mar 22, 2010)
  
  
• J. Schmidtke, W. Stille, S. Kniesel, B. Chen, and H. Finkelmann
  Cholesteric elastomers as mechanically tunable photonic band gap materials
  International Workshop on Liquid Crystals for Photonics, Gent, Belgium (Apr 28, 2006)
  
  
• J. Schmidtke
  Photonic Properties of Cholesteric Liquid Crystals
  Takezoe Lab, Department of Organic and Polymeric Materials, Tokyo Institute of Technology (Nov 26, 2005)
  
  
• J. Schmidtke
  Photonic Properties of Cholesteric Liquid Crystals
  Ozaki Lab, Department of Electronic Engineering, Osaka University (Nov 21, 2005)
  
  
• J. Schmidtke, W. Stille, B. Chen, S. Kniesel, and H. Finkelmann
  Cholesteric elastomers as mechanically tunable photonic band gap materials
  International Liquid Crystal Elastomer Conference, Cambridge, UK (Sep 22, 2005)
  
  
• J. Schmidtke
  Photonic Properties of Cholesteric Liquid Crystals
  Center for Optoelectronics and Photonics, University of Paderborn (Jun 08, 2005)
  
  
• J. Schmidtke, W. Stille, S. Kniesel, and H. Finkelmann
  Cholesteric elastomers as mechanically tunable photonic band gap materials
  Spring Meeting of the German Physical Society, Berlin (Mar 05, 2005)
  
  
• J. Schmidtke, W. Stille, S. Kniesel, and H. Finkelmann
  Photonic properties of cholesteric polymer networks
  SPIE Photonics West, San Jose (Jan 26, 2005)
  (Invited talk)
  
  
• Entwicklung von Polymerlasern auf der Basis cholesterischer Flüssigkristalle
  University of Karlsruhe (Jul 16, 2004), laureate lecture:
  Otto-Lehmann-Award 2004 for outstanding achievements in applied liquid crystal research (together with Alexey Eremin)
  
  
• Photonic Properties of Cholesteric Liquid Crystals
  Liquid Crystal Institute, Kent State University (Apr 21, 2004)
  
  
• J. Schmidtke, W.Stille and H. Finkelmann
  Optical Microresonators Formed by Cholesteric Liquid Crystals
  Arbeitstagung Flüssigkristalle, Halle, Germany (2004)
  
  
• Entwicklung von Lasersystemen auf Basis cholesterischer Polymer-Flüssigkristalle
  45. Sitzung des DECHEMA-Arbeitsausschusses "Polyreaktionen"
  DECHEMA e.V., Frankfurt (Jan 20, 2004)
  
  
• J. Schmidtke, W.Stille and H. Finkelmann
  Cholesteric Films as Photonic Bandgap Materials and the Role of Crosslinking
  2nd International Workshop on Liquid Crystalline Elastomers, Bleibach im Elztal, Germany (2003)
  
  
• J. Schmidtke, W.Stille and H. Finkelmann
  Probing the Photonic Properties of Cholesteric Liquid Crystal Films by Fluorescent Guest Molecules
  10th International Topical Meeting on Optics of Liquid Crystals, Aussois (Modane), France (2003)
  (Invited talk)
  
  
• J. Schmidtke, W.Stille and H. Finkelmann
  Probing the Photonic Properties of Cholesteric Liquid Crystal Films by Fluorescent Guest Molecules
  Spring Meeting of the German Physical Society, Dresden (2003)
  
  
• J. Schmidtke, W.Stille and H. Finkelmann
  Probing the Photonic Properties of Cholesteric Liquid Crystal Films by Fluorescent Guest Molecules
  Topical Meeting on Luminescent Liquid Crystals, London (2003)
  
  
• J. Schmidtke, W.Stille and H. Finkelmann
  Probing the Photonic Properties of Cholesteric Liquid Crystal Films by Fluorescent Guest Molecules
  Optical Probes 2003, Venice, Italy (2003)
  
  
• Laser emission of cholesteric liquid crystal films
  Applied Optics Group, Institute of Microtechnology
  University of Neuchatel (May 7, 2002)
  
  
• Laser emission of cholesteric liquid crystal films
  Group of Polymers and Organic Chemistry
  Philips Research Laboratories, Eindhoven (Apr 18, 2002)
  
  
• J. Schmidtke, W.Stille, H. Finkelmann, and S. T. Kim
  Laser Emission in Cholesteric Polymer Networks
  Freiburger Arbeitstagung Flüssigkristalle, Freiburg, Germany (2002)
  
  
• J. Schmidtke, W.Stille, H. Finkelmann, and S. T. Kim
  Laser Emission of a Dye-Doped Cholesteric Polymer Network
  Spring Meeting of the German Physical Society, Regensburg (2002)
  
  
• J. Schmidtke, W. Stille, H. Finkelmann, and S. T. Kim
  Lasing in Cholesteric Networks
  International Workshop on Liquid Crystalline Elastomers, Ebernburg, Germany (2001)
  
  
• J. Schmidtke, M. Schönstein, W.Stille, and G. Strobl
  Statische und dynamische Lichtstreuung an vernetzten und unvernetzten LC-Polymeren
  Spring Meeting of the German Physical Society, Potsdam (2000)
  
  

Poster presentations

• J. Schmidtke
  Using absorption bands for photonic band gap engineering in cholesteric liquid crystals
  26th International Liquid Crystal Conference, Kent State University, USA (2016)
  
  
• J. Schmidtke and H.-S. Kitzerow
  Emissive cholesteric films: Dye diffusion, dye depletion and helix distortion
  40th Topical Meeting on Liquid Crystals, Paderborn, Germany (2014)
  
  
• J. Schmidtke, G. Nordendorf, A. Hoischen, H.-S. Kitzerow, D. Wilkes, and M. Wittek
  Exploring the phase diagram of UV-reflecting blue phase systems
  40th Topical Meeting on Liquid Crystals, Paderborn, Germany (2013)
  
  
• J. Schmidtke and H.-S. Kitzerow
  Electrical fine tuning of liquid crystal lasers
  Spring Meeting of the German Physical Society, Berlin (2012)
  
  
• J. Schmidtke, L. Lu, and H.-S. Kitzerow
  Improving the performance of liquid crystal lasers by electric fields
  Spring Meeting of the German Physical Society, Berlin (2012)
  
  
• J. Schmidtke, L. Lu, and H.-S. Kitzerow
  Improving Performance of Liquid Crystal Lasers by Electric Fields
  14th International Topical Meeting Optics of Liquid Crystals, Yerevan, Armenia (2011)
  
  
• J. Schmidtke and E. M. Terentjev
  PDMS-Enclosed Liquid Crystal Lasers for Lab-On-Chip Applications
  23d International Liquid Crystal Conference, Krakow, Poland (2010)
  
  
• J. Schmidtke and E. M. Terentjev
  PDMS-Enclosed Liquid Crystal Lasers for Lab-On-Chip Applications
  38th Topical Meeting on Liquid Crystals, Mainz (Germany) (2010)
  
  
• J. Schmidtke, C. Gillespie, and H. J. Coles
  Towards high performance LC lasers: Monitoring dye depletion, dye diffusion and helix distortion by transient fluorescence measurements
  International Workshop on Liquid Crystals for Photonics, Cambridge, UK (2008)
  
  
• J. Schmidtke, W. Stille, B. Chen, S. Kniesel, and H. Finkelmann
  Cholesteric elastomers as mechanically tunable photonic band gap materials
  21st International Liquid Crystal Conference, Keystone (Colorado, US) (2006)
  
  
• J. Schmidtke, W. Stille, S. Kniesel, and H. Finkelmann
  Mechanically Tunable Photonic Properties of Cholesteric Elastomers
  32. Arbeitstagung Flüssigkristalle, Paderborn, Germany (2005)
  
  
• J. Schmidtke, W. Stille, S. Kniesel, and H. Finkelmann
  Laseremission in cholesterischen Flüssigkristallen
  Makromolekulares Kolloquium, Freiburg, Germany (2005)
  
  
• J. Schmidtke, W. Stille and H. Finkelmann
  Optical Microresonators Formed by Cholesteric Liquid Crystals
  20th International Liquid Crystal Conference, Ljubljana, Slovenia (2004)
  
  
• J. Schmidtke, W. Stille and H. Finkelmann
  Optical Microresonators Formed by Cholesteric Liquid Crystals
  Spring Meeting of the German Physical Society, Regensburg (2004)
  
  
• J. Schmidtke, W. Stille and H. Finkelmann
  Probing the Photonic Properties of Cholesteric Liquid Crystal Films by Fluorescent Guest Molecules
  31. Arbeitstagung Flüssigkristalle, Mainz, Germany (2003)
  
  
• J. Schmidtke, W. Stille, S. Kniesel, and H. Finkelmann
  Mirrorless Lasing in Cholesteric Polymer Networks
  19th International Liquid Crystal Conference, Edinburgh (2002)
  
  
• J. Schmidtke, M. Schönstein, W. Stille, and G. Strobl
  Static and Dynamic Light Scattering of Crosslinked and Non-Crosslinked LC-Polymers
  Freiburger Arbeitstagung Flüssigkristalle, Freiburg, Germany (1999)
  
  
• J. Schmidtke, M. Schönstein, W. Stille, and G. Strobl
  Static and Dynamic Light Scattering of Crosslinked and Non-Crosslinked LC-Polymers
  LS '99: Data Evaluation in Light Scattering of Polymers, Bad Schandau/Elbe, Germany (1999)
  
  

Updated: October 28, 2021