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Center for Nonlinear Studies |
Low dimensional semiconductors, such as layered perovskites and transition metal dichalcogenides, have unusual optical electronic properties and have attracted considerable recent attention various technological applications. Spectral line-shapes provide a window into the local environment surrounding the optical excitations, which may also in driven in concert with the optical signals. In my talk, I will discuss my recent work in developing stochastic models for describing non-stationary and non-equilibrium "dark" exciton processes in 2d materials and their signatures in 2D coherent spectral responses. Our model resolves a number of questions involving spectral shifts, line-shape narrowing, and phase-scrambling observed in lead and tin-based Ruddlesden-Popper metal halides.
Host: Andrei Piryatinski