17:15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle
Faculty of Physics, Soft Condensed Matter Group, Ludwig-Maximilians-Universität, München
Infrared near-field microscopy
Abstract:
Infrared illumination of an AFM tip can produce infrared images ontop of topography at, surprisingly, identical super-resolution of 20 nm. In my talk I explain how and why this is possible (hint: surface waves), and describe applications.
The technique called scattering-type optical near-field microscopy (s-SNOM) enables quantitative chemical recognition of nanoscale inhomogeneities, e.g., during insulator-metal phase transitions, in polymer mixtures, or in cometary matter. It has allowed to study the nanoscale architecture of biominerals and, recently, electron correlation on twisted bilayer graphene even at LHe temperature.
