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Physical Institute

Spectroscopy of soft Matter group- Prof. Dr. Jürgen Köhler

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Photochromic Switches

Photochromic molecules can be interconverted between two bistable forms by light. These systems are a promising class of materials for developing molecular devices where electrons have been replaced by photons as signal carriers.
In our group we demonstrated an optical transistor, i.e. a transistor that runs on photons rather than electrons, and investigate molecules for optical gating in logic circuits.

read more:

  • M. Pärs, C.C. Hofmann, K. Willinger, P. Bauer, M. Thelakkat, J. Köhler
    An Organic Optical Transistor Operated under Ambient Conditions
    Ang. Chem. Int. Ed. 50 (2011) 11405-11408, DOI: 10.1002/anie.201104193
  • M. Pärs, K. Gräf, P. Bauer, M. Thelakkat, J. Köhler
    Optical Gating of Perylene Bisimide Fluorescence Using Dithienylcyclopentene Photochromic Switches
    Applied Physics Letters 103 (2013) 221115-1 – 221115-4; DOI: 10.1063/1.4837355
    classified as „Research Highlight“, Nature Photonics 8 (2014) 84
  • M. Pärs, M. Gradmann, K. Gräf, P. Bauer, M. Thelakkat, J. Köhler
    Optical Gating with Organic Building Blocks. A Quantitative Model for the Fluorescence Modulation of Photochromic Perylene Bisimide Dithienylcyclopentene Triads
    Scientific Reports 4 (2014) 4316-1 – 4316-6, DOI: 10.1038/srep04316
  • J. Maier, M. Pärs, T. Weller, M. Thelakkat, J. Köhler
    Deliberate Switching of Single Photochromic Triads
    Scientific Reports 7 (2017) 41739-1 – 41739-8, DOI: 10.1038/srep41739

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