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DS: Fachverband Dünne Schichten
DS 32: Poster: Optical Analysis of Thin Films
DS 32.2: Poster
Mittwoch, 18. März 2020, 15:00–18:00, P1A
Ultrafast pump-probe microscopy on MoSe2 — •Konrad Birkmeier1,2, Lucas Lange1, Edoardo Amarotti1, and Achim Hartschuh1 — 1Department of Chemistry and CeNS, LMU Munich, Germany — 2Toptica Photonics AG, Graefelfing, Germany
We investigate single and few layer MoSe2 by ultrafast pump-probe spectroscopy and microscopy giving insight to the decay dynamics in the 2D material. The excitation of different excitonic states by the pump pulse causes changes in the transient reflectivity and can be probed and spectrally resolved by broadband whitelight pulses rangig from the visible to the near infrared. By the subsequent use of ultra short, wavelength tunable probe pulses the decay dynamics of the excited states can be investigated further with a high signal to noise ratio. In combination with the high spatial resolution of confocal microscopy the carrier dynamics at boundaries, wrinkels and other inhomogeneities will be discussed.