Berlin 2018 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 17: Poster Session I

DS 17.30: Poster

Dienstag, 13. März 2018, 18:15–20:15, Poster B

Utrafast dynamics in MoS2 probed by transient Raman spectroscopy — •Christoph Boguschewski, Jingyi Zhu, and Paul H.M. van Loosdrecht — II. Physikalisches Institut der Universität zu Köln

Mono-layer transition metal dichalcogenides (TMDs) form the most important materials platform for the emerging field of valleytronics. In order to further develop this field, it is crucial that one understands the dynamical aspects of valley excitations, including both population and polarization dynamics. Here we present a study of these dynamics in MoS2 using picosecond time resolved spontaneous Raman scattering. Apart from an insight into the phonon population dynamics, this technique yields a detailed insight in the population and polarization dynamics of valley excitations through the transient behavior of a doubly resonant Raman response in TMDs.