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Giant intrinsic circular dichroism of prolinol-derived squaraine thin films

Author

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  • Matthias Schulz

    (Rheinische-Friedrich-Wilhelms-University of Bonn)

  • Jennifer Zablocki

    (Rheinische-Friedrich-Wilhelms-University of Bonn)

  • Oliya S. Abdullaeva

    (Carl-von-Ossietzky-University of Oldenburg)

  • Stefanie Brück

    (Rheinische-Friedrich-Wilhelms-University of Bonn)

  • Frank Balzer

    (Mads Clausen Institute, University of Southern Denmark)

  • Arne Lützen

    (Rheinische-Friedrich-Wilhelms-University of Bonn)

  • Oriol Arteaga

    (University of Barcelona)

  • Manuela Schiek

    (Carl-von-Ossietzky-University of Oldenburg)

Abstract

Molecular chirality and the inherently connected differential absorption of circular polarized light (CD) combined with semiconducting properties offers great potential for chiral opto-electronics. Here we discuss the temperature-controlled assembly of enantiopure prolinol functionalized squaraines with opposite handedness into intrinsically circular dichroic, molecular J-aggregates in spincasted thin films. By Mueller matrix spectroscopy we accurately probe an extraordinary high excitonic circular dichroism, which is not amplified by mesoscopic ordering effects. At maximum, CD values of 1000 mdeg/nm are reached and, after accounting for reflection losses related to the thin film nature, we obtain a film thickness independent dissymmetry factor g = 0.75. The large oscillator strength of the corresponding absorption within the deep-red spectral range translates into a negative real part of the dielectric function in the spectral vicinity of the exciton resonance. Thereby, we provide a new small molecular benchmark material for the development of organic thin film based chiroptics.

Suggested Citation

  • Matthias Schulz & Jennifer Zablocki & Oliya S. Abdullaeva & Stefanie Brück & Frank Balzer & Arne Lützen & Oriol Arteaga & Manuela Schiek, 2018. "Giant intrinsic circular dichroism of prolinol-derived squaraine thin films," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04811-7
    DOI: 10.1038/s41467-018-04811-7
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    Cited by:

    1. Daniel Timmer & Moritz Gittinger & Thomas Quenzel & Sven Stephan & Yu Zhang & Marvin F. Schumacher & Arne Lützen & Martin Silies & Sergei Tretiak & Jin-Hui Zhong & Antonietta De Sio & Christoph Lienau, 2023. "Plasmon mediated coherent population oscillations in molecular aggregates," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Ufuk Kilic & Matthew Hilfiker & Shawn Wimer & Alexander Ruder & Eva Schubert & Mathias Schubert & Christos Argyropoulos, 2024. "Controlling the broadband enhanced light chirality with L-shaped dielectric metamaterials," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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