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Proceedings Paper

Electric field induced variations of excited state lifetimes and photoluminescence spectra in 2D heterostructures
Author(s): Michael Engel; Mathias Steiner
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Paper Abstract

Here we present electric field-controlled, two-dimensional (2D) exciton dynamics in transition metal dichalcogenide monolayers. We have experimentally investigated the spectral and temporal properties of the A-exciton in a molybdenum diselenide (MoSe2) monolayer under controlled variation of a vertical, electric dc field at room temperature. By using steady-state and timeresolved photoluminescence spectroscopies, we have observed dc field-induced spectral shifts and linewidth broadenings that are consistent with the shortening of the exciton’s non-radiative lifetime due to field-induced dissociation. We discuss the implications of the results for future developments in nanoscale metrology and exploratory, optoelectronics technologies based on layered, 2D semiconductors.

Paper Details

Date Published: 9 September 2019
PDF: 12 pages
Proc. SPIE 11085, Low-Dimensional Materials and Devices 2019, 110850W (9 September 2019); doi: 10.1117/12.2529461
Show Author Affiliations
Michael Engel, IBM Research - Brazil (Brazil)
Mathias Steiner, IBM Research - Brazil (Brazil)
IBM TJ Watson Research Ctr. (United States)

Published in SPIE Proceedings Vol. 11085:
Low-Dimensional Materials and Devices 2019
Nobuhiko P. Kobayashi; A. Alec Talin; Albert V. Davydov, Editor(s)

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