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Attend a research seminar exploring optical spectroscopy of heterostructures with MoSe2 and WSe2 monolayers, presented by Dr. Grygoriy Golyshkov from the Institute of Solid State Physics of the Russian Academy of Sciences. Discover how microphotoluminescence and reflection-transmission spectroscopy techniques are used to investigate heterostructures based on MoSe2 and WSe2 monolayers across a wide temperature range. Learn about the observation of fundamental A- and B-exciton states and their excited states (A:2s, A:3s, B:2s) in reflection spectra, and understand how optimal structural parameters enable the detection of excited excitonic states in reflection spectra up to room temperature. Explore the methodology for determining exciton binding energy through numerical solution of the Schrödinger equation, and examine how comparison between experimental and calculated results allows for the determination of bandgap width and polarizability of two-dimensional layers. Gain insights into advanced spectroscopic characterization techniques for two-dimensional materials and their heterostructures, with particular focus on excitonic properties and their temperature dependence.
