Oct 13, 2022

Title: Ultrafast nanoscopy: watching quantum dynamics in time and space

 

Speaker: Prof. Markus B. Raschke

                Department of Physics, University of Colorado Boulder

​

Abstract:

Understanding, and ultimately controlling the properties of matter, from molecular to quantum systems, requires imaging the elementary excitations on their natural time and length scales. To achieve that goal we developed scanning probe microscopies with ultrafast and shaped laser pulse excitation for multiscale spatio-spectral and spatio-temporal optical nano-imaging. In corresponding ultrafast movies we resolve the fundamental quantum dynamics from the few-femtosecond coherent to the thermal transport regime. I will discuss specific examples visualizing in space and time the nanoscale heterogeneity in competing structural and electronic processes that define, e.g., the performance in perovskite photovoltaics or coherence in 2D heterostructures. I will then extend the discussion to the control of new forms of photon-matter hybrid states of single emitters to new regimes of nonlocal and quantum nonlinear nano-optics.

​