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OPTICAL CHARACTERIZATION & MODELLING

Dr. Tobias A. F. König

Group Leader Optical Characterization & Modelling
at the Leibniz-Institut für Polymerforschung Dresden e.V.

Hohe Strasse 6
01069 Dresden
Phone: +49 (0)351 4658-676
Fax: +49 (0)351 4658-281
Email: koenig@ipfdd.de

 

 

Group Members

Research topics

Our research aim is to control the effective optical properties of mesostructured assemblies by using self-assembly methods in combination with tailored building blocks. Optical metamaterials are artificially structured materials which have a controlled heterogeneity on a length scale less than the wavelength of light. By using a smart design we can control the interaction of light with the nanostructured material which leads to novel optical properties (see Figure below). The tailored optical properties are of interest for a broad academic and industrial community for possible applications in the field of energy production (light harvesting, light concentrators), information technology (manipulation of light flow and storage, logic photonic circuits), stealth (optical cloaking, negative refractive index), and life sciences (physical and chemical sensing). There are well-established approaches for guiding the flow of light and tailoring its reflection using optical metamaterials. However, this material class is limited by its elaborated top-down fabrication methods such as e-beam lithography or ion-beam milling (losses due to polycrystallinity, lack in resolution and scalability). Building up on those, we are using template-assisted self-assembly methods (bottom-up techniques) to obtain scalable mesostructured materials. Our research is dedicated to modelling, fabrication and characterization of novel functional system materials based on a unique combination of organic and inorganic materials. We aim the creation of tailored system materials, by employing the interaction of different components, such as nanoparticles, nanostructures and functional polymers.

Equipment

  • Electromagnetic modelling by Mie theory and numerical finite-difference time-domain (FDRD) methode
  • Template fabrication by laser interference lithography
  • Mesostructured assembly by capillary-assisted particle-assembly
  • Nikon Eclipse Ti-U inverted microscope and New Technologies & Consulting for dark field microscopy and black focal plane imaging (BFPI)
  • Agilent Cary 5000 UV-Vis-NIR including universal measurement accesory (UMA) and integrating sphere
  • PicoQuant MicroTime200 for time and space resolved spectroscopy
  • J.A. Woollam Co. dual rotating compensator (RC2) ellipsometer

Projects

  • Cluster of Excellence: Center for Advancing Electronics Dresden (cfaed), Biomolecular-Assembled Circuits (BAC) path

5 most important publications

  • Strongly coupled plasmonic modes on macroscopic areas via template assisted colloidal self-assembly, C. Hanske, M. Tebbe, C. Kuttner, V. Bieber, V.V. Tsukruk, M. Chanana, T.A.F. König,* A. Fery*, Nano Lett., 2014, 14, 6863. DOI: 10.1021/nl502776s
  • Template-assisted colloidal self-assembly of macroscopic magnetic metasurfaces, M. Mayer, M. Tebbe, C. Kuttner, M.J. Schnepf, T.A.F. König,* A. Fery*, Faraday Discuss., 2016, 191, 159. DOI: 10.1039/C6FD00013D
  • Electrically tunable plasmonic behaviour of nanocube-polymer nanomaterials induced by a redox-active electrochromic polymer, T.A.F. König, P.A. Ledin, J. Kerszulis, M.A. Mahmoud, M.A. El-Sayed, J.R. Reynolds, V.V. Tsukruk*, ACS Nano, 2014, 6, 6182. DOI: 10.1021/nn501601e
  • Silver nanocube aggregates in cylindrical pores for higher refractive index plasmonic sensing, T.A.F. König, R. Kodiyath, Z.A. Combs, M.A. Mahmoud, M.A. El-Sayed, V.V. Tsukruk*, Part. Part. Syst. Charact., 2014, 2, 274. DOI: 10.1002/ppsc.201300217
  • Reversible structuring of photosensitive polymer films by surface plasmon near field radiation, T.A.F. König, L.M. Goldenberg, O. Kulikovska, L. Kulikovsky, J. Stumpe, S. Santer*, Soft Matter, 2011, 7, 4174.