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Institute Colloquium


Prof. Eckart Hasselbrink


Insights into the short life of vibrations from time-resolved spectroscopy

April 19, 2024

Start: 9:30 am

Conference Room at Leibniz IPHT


Contact persons at Leibniz IPHT: Benjamin Dietzek-Ivanšić 

  • PhD 1986 in Göttingen with Hans Pauly on molecular beam scattering for laser excited atoms
  • Post-doc with Richard N. Zare in Stanford. Work on gas phase photodissociation dynamics
  • Staff member with Gerhard Ertl in Berlin. Work on surface photochemistry and reaction dynamics
  • Lecturer in Physics in Odense, Denmark
  • Professor for Physical Chemistry in Essen since 1998

Molecular vibrations are the degrees of freedom into which often large proportions of the excess energy from chemical reactions are channeled. Vibrations are also a energy reservoir with large efficacy for activating reaction. However vibrational excitations in condensed matter are also short-lived. Time-resolved vibrational spectroscopy has seen great progress in the last decades largely due to the advent of powerful short pulsed mid-IR laser systems. Spectroscopy performed with these allow us to gain detailed insight into the energy flow between different degrees of freedom. In my lecture I will illustrate this research by studies from my laboratory: 1) The vibrational dynamics of simple adsorbates on semi-conductor surfaces, and 2) The vibrational dynamics of C-H stretching modes studied in layers of fatty acids.

The lecture will be given in English.