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Welcome to the Nonlinear Interfacial Spectroscopy Group
Our group focusses on the investigation molecular structures and dynamics at interfaces using ultrafast nonlinear spectroscopic techniques. Our goal is to better understand the unique physical properties of molecular interfaces and unravel the mechanisms of interfacial physico-chemical processes.
We therefore employ and develop novel spectroscopic tools based on second order nonlinear light-matter interactions where we combine vibrational information with spatial resolution. This includes phase-sensitive SFG/DFG spectroscopy and microscopy as well as time-resolved techniques such as vibrational pump-probe and multidimensional spectroscopies.
Latest news:
Focus Session at the DPG Spring-Meeting
Mar 2025
At the DPG Spring-Meeting in Regensburg Alex and I organized a Focus Session on Chemical Imaging. This was an exciting session with lots of interesting contributions.
Alex starts his own group
Jan 2025
After two very successful years as a Postdoc in our group Alex now started his own group (Nonlinear Chemical Imaging Group) at our institute. Congratulations!
The two groups will be working closely together on the nonlinear spectroscopy and microscopy projects.
The two groups will be working closely together on the nonlinear spectroscopy and microscopy projects.
New group member
Dec 2024
Nasim just joined our group. She is a Postdoc and will be working on the SFG microscopy project focussing on the implementation of super-resolution techniques in our microscope. Welcome!
New paper published on depth-resolved SFG spectroscopy
Nov 2024
This perspective by Alex and Alvaro is now published in JPC-C. In this work, the effect of depth dependent changes in molecular structures on nonlinear vibrational spectra is analyzed and various experimental strategies to obtain information on these structural properties are evaluated. This paper was selected as ACS editor’s choice highlighting its impact. Congratulations!
Link to publication
Link to publication
New paper published on phase-resolved SFG microscopy
Oct 2024
This work by Alex and Ben is now published in JPC Letters. The paper demonstrates the succsessful determination of the full 3D molecular orientation in phpospholipid monolayers by applying phase-resolved SFG microsocpy as function of sample rotation.
Link to publication
Link to publication
2nd poster prize for Alex
Aug 2024
Alex receives a poster prize for his work on water at the Vibrational GRC in Smithfield, Rhode Island. Congratulations again!
New paper published on anisotropc water structure
Aug 2024
This work by Alex, Alvaro, and Vasilis is now published in Langmuir. It detemines the length scale of the structural anisotropy decay at the air-water interface using our depth-resolved SFG/DFG spectroscopy. This work is the first direct experimental measurement thickness of the interfacial water layer.
Link to publication
Link to publication
Poster prize
Jul 2024
Alex receives a poster prize with his work on structural anisotropy at the air-water interface at the Water GRC in Holderness, New Hampshire. Congratulations!