Nonlocal exciton dynamics in monolayer WS_2

Hans D. Hallen; Landon Hernandez; Da Zhou; Mauricio Terrones; Zhiwen Liu

doi:10.1117/12.2635671

3 October 2022 Nonlocal exciton dynamics in monolayer WS₂

Hans D. Hallen, Landon Hernandez, Da Zhou, Mauricio Terrones, Zhiwen Liu

Proceedings Volume PC12228, Ultrafast Nonlinear Imaging and Spectroscopy X; PC1222803 (2022) https://doi.org/10.1117/12.2635671
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Nonlocal exciton emission in the two-dimensional material WS2 is an important indicator of dynamics of the system. Spectral shift of the emission is also important, as it indicates regions with different bandgaps, and a smaller bandgap region can 'trap' excitons. We observe both at once using a CCD readout on a spectrometer in which 1D spectral together with 1D spatial measurements are performed. Back-propagation of the slit to the sample indicates the Photo Luminescent (PL) emission region around the excitation spot. A dove prism allows effective rotation of the slit. Quantitative analysis of the spectral and spatial dynamics is discussed.

Conference Presentation

Citation Download Citation

Hans D. Hallen, Landon Hernandez, Da Zhou, Mauricio Terrones, and Zhiwen Liu "Nonlocal exciton dynamics in monolayer WS₂", Proc. SPIE PC12228, Ultrafast Nonlinear Imaging and Spectroscopy X, PC1222803 (3 October 2022); https://doi.org/10.1117/12.2635671

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