The Impact of the Substrate Material on the Optical Properties of 2D WSe2 Monolayers
- Authors: Schneider L.M.1, Lippert S.1, Kuhnert J.1, Renaud D.1, Kang K.N.2, Ajayi O.2, Halbich M.1, Abdulmunem O.M.1, Lin X.1, Hassoon K.1, Edalati-Boostan S.1, Kim Y.D.2, Heimbrodt W.1, Yang E.H.2, Hone J.C.2, Rahimi-Iman A.1
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Affiliations:
- Department of Physics and Materials Sciences Center
- Department of Mechanical Engineering
- Issue: Vol 52, No 5 (2018)
- Pages: 565-571
- Section: XXV International Symposium “Nanostructures: Physics and Technology”, Saint Petersburg, Russia, June 26–30, 2017. Excitons in Nanostructures
- URL: https://journals.rcsi.science/1063-7826/article/view/203030
- DOI: https://doi.org/10.1134/S1063782618050275
- ID: 203030
Cite item
Abstract
2D-materials, especially transition metal dichalcogenides (TMDs) have drawn a lot of attention due to their remarkable characteristics rendering them a promising candidate for optical applications. While the basic properties are understood up to now, the influence of the environment has not been studied in detail, yet. Here we highlight a systematic comparison of the optical properties of tungsten diselenide monolayers on different substrates. Subtle changes in the emission spectrum and Raman signature have been found as well as surprisingly pronounced differences in the pump-power-dependent and time-resolved output at higher excitation densities. For all samples, exciton–exciton annihilation can be obtained. Nevertheless an analysis of different pump-dependent decay rates suggests substrate-dependent changes in the diffusion constant as well as exciton Bohr radius.
About the authors
L. M. Schneider
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
S. Lippert
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
J. Kuhnert
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
D. Renaud
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
K. N. Kang
Department of Mechanical Engineering
Email: a.r-i@physik.uni-marburg.de
United States, Hoboken, New Jersey, 07030
O. Ajayi
Department of Mechanical Engineering
Email: a.r-i@physik.uni-marburg.de
United States, New York, 10027
M.-U. Halbich
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
O. M. Abdulmunem
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
X. Lin
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
K. Hassoon
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
S. Edalati-Boostan
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
Y. D. Kim
Department of Mechanical Engineering
Email: a.r-i@physik.uni-marburg.de
United States, New York, 10027
W. Heimbrodt
Department of Physics and Materials Sciences Center
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032
E. H. Yang
Department of Mechanical Engineering
Email: a.r-i@physik.uni-marburg.de
United States, Hoboken, New Jersey, 07030
J. C. Hone
Department of Mechanical Engineering
Email: a.r-i@physik.uni-marburg.de
United States, New York, 10027
A. Rahimi-Iman
Department of Physics and Materials Sciences Center
Author for correspondence.
Email: a.r-i@physik.uni-marburg.de
Germany, Marburg, 35032