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Time-resolved THz Stark spectroscopy of molecules in solution

Author

Listed:
  • Bong Joo Kang

    (University of Bern
    Korea Research Institute of Chemical Technology (KRICT))

  • Egmont J. Rohwer

    (University of Bern)

  • David Rohrbach

    (University of Bern)

  • Elnaz Zyaee

    (University of Bern)

  • Maryam Akbarimoosavi

    (University of Bern)

  • Zoltan Ollmann

    (University of Bern)

  • Gleb Sorohhov

    (University of Bern)

  • Alex Borgoo

    (University of Oslo)

  • Michele Cascella

    (University of Oslo)

  • Andrea Cannizzo

    (University of Bern)

  • Silvio Decurtins

    (University of Bern)

  • Robert J. Stanley

    (Temple University)

  • Shi-Xia Liu

    (University of Bern)

  • Thomas Feurer

    (University of Bern)

Abstract

For decades, it was considered all but impossible to perform Stark spectroscopy on molecules in a liquid solution, because their concomitant orientation to the applied electric field results in overwhelming background signals. A way out was to immobilize the solute molecules by freezing the solvent. While mitigating solute orientation, freezing removes the possibility to study molecules in liquid environments at ambient conditions. Here we demonstrate time-resolved THz Stark spectroscopy, utilizing intense single-cycle terahertz pulses as electric field source. At THz frequencies, solute molecules have no time to orient their dipole moments. Hence, dynamic Stark spectroscopy on the time scales of molecular vibrations or rotations in both non-polar and polar solvents at arbitrary temperatures is now possible. We verify THz Stark spectroscopy for two judiciously selected molecular systems and compare the results to conventional Stark spectroscopy and first principle calculations.

Suggested Citation

  • Bong Joo Kang & Egmont J. Rohwer & David Rohrbach & Elnaz Zyaee & Maryam Akbarimoosavi & Zoltan Ollmann & Gleb Sorohhov & Alex Borgoo & Michele Cascella & Andrea Cannizzo & Silvio Decurtins & Robert J, 2024. "Time-resolved THz Stark spectroscopy of molecules in solution," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48164-w
    DOI: 10.1038/s41467-024-48164-w
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    References listed on IDEAS

    as
    1. C. Schmidt & J. Bühler & A.-C. Heinrich & J. Allerbeck & R. Podzimski & D. Berghoff & T. Meier & W. G. Schmidt & C. Reichl & W. Wegscheider & D. Brida & A. Leitenstorfer, 2018. "Signatures of transient Wannier-Stark localization in bulk gallium arsenide," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
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