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ЖУРНАЛЫ // Физика и техника полупроводников // Архив

Физика и техника полупроводников, 2018, том 52, выпуск 5, страница 499 (Mi phts5825)

Эта публикация цитируется в 14 статьях

XXV International Symposium ''Nanostructures: Physics and Technology'', Saint Petersburg, June 26-30, 2017
Excitons in Nanostructures

The impact of the substrate material on the optical properties of 2D WSe$_{2}$ monolayers

L. M. Schneidera, S. Lipperta, J. Kuhnerta, D. Renauda, K. N. Kangb, O. Ajayic, M.-U. Halbicha, O. M. Abdulmunema, X. Lina, K. Hassoona, S. Edalati-Boostana, Y. D. Kimc, W. Heimbrodta, E.-H. Yangb, J. C. Honec, A. Rahimi-Imana

a Department of Physics and Materials Sciences Center, Philipps-Universität, 35032 Marburg, Germany
b Department of Mechanical Engineering, Stevens Institute of Technology, 07030 Hoboken, New Jersey, USA
c Department of Mechanical Engineering, Columbia University, New York, 10027 New York, USA

Аннотация: 2$D$-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.

Язык публикации: английский


 Англоязычная версия: Semiconductors, 2018, 52:5, 565–571

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