IR spectromicroscopy and imaging with six decades of dynamic range

  • Date: –14:00
  • Location: Ångströmlaboratoriet, Lägerhyddsvägen 1 Ång 80127
  • Lecturer: Ferenc Borondics, Synchrotron SOLEIL, Paris
  • Contact person: Olle Björneholm
  • Seminarium

The Centre for Photon Science invites you to a seminar by Ferenc Borondics on IR spectromicroscopy and imaging.


Infrared spectroscopy has been in scientists' toolbox for more than a century to obtain information about vibrational properties and low energy electrodynamics of materials. The beginning of the 80s brought the first commercial infrared microscopes to look into fine details. Far-field infrared spectromicroscopy had been pushed to its limits in the 90s at synchrotron facilities by exploiting the unrivaled quality of synchrotron radiation, i.e., low angular divergence and extremely high bandwidth. Synchrotron infrared spectromicroscopy beamlines provide diffraction-limited spatial resolution covering the whole IR range and enable experiments impossible otherwise. Later, the implementation of two-dimensional IR detectors allowed hyperspectral imaging of large samples with high spatial resolution. The turn of the century brought the advent of near-field IR techniques breaking through the diffraction limit. Combining high-brightness IR sources with atomic force microscopes to detect photothermal expansion or near-field scattering allows measurements hundreds of times below the diffraction limit reaching as high as ten-nanometer spatial resolution. Optically sampled photothermal spectromicroscopy has recently become available to bridge the resolution gap between the nanometer and micrometer range. We combine these techniques at the SMIS beamline to enable six orders of magnitude spatial dynamic range in infrared spectromicroscopy and support scientific discovery by exploiting the synchrotron source through commercial and custom instrumentation. In this talk, I will highlight discoveries made by SMIS staff and users enabled by the beamline's capability and comment on the benefits of emerging, alternative sources.

Last modified: 2021-02-14