Exciton dynamics in WSe2 bilayers

G. Wang; X. Marie; L. Bouet; M. Vidal; A. Balocchi; T. Amand; D. Lagarde; B. Urbaszek

doi:10.1063/1.4900945

Exciton dynamics in WSe₂ bilayers

G. Wang^*, X. Marie, L. Bouet, M. Vidal, A. Balocchi, T. Amand, D. Lagarde, B. Urbaszek

^*此作品的通讯作者

Université de Toulouse

科研成果: 期刊稿件 › 文章 › 同行评审

51 引用（Scopus）

摘要

We investigate exciton dynamics in WSe₂ bilayers in time-resolved photoluminescence (PL) spectroscopy. Fast PL emission times are recorded for both the direct exciton with τ _D ≲3 ps and the indirect optical transition with τ _I≈25 ps. For temperatures between 4 to 150 K τ _I remains constant. Following polarized laser excitation, we observe for the direct exciton transition at the K point of the Brillouin zone efficient optical orientation and alignment during the short emission time τ _D. The evolution of the direct exciton polarization and intensity as a function of excitation laser energy is monitored in PL excitation experiments.

源语言	英语
文章编号	182105
期刊	Applied Physics Letters
卷	105
期	18
DOI	https://doi.org/10.1063/1.4900945
出版状态	已出版 - 3 11月 2014
已对外发布	是

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Wang, G., Marie, X., Bouet, L., Vidal, M., Balocchi, A., Amand, T., Lagarde, D., & Urbaszek, B. (2014). Exciton dynamics in WSe₂ bilayers. Applied Physics Letters, 105(18), 文章 182105. https://doi.org/10.1063/1.4900945

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abstract = "We investigate exciton dynamics in WSe2 bilayers in time-resolved photoluminescence (PL) spectroscopy. Fast PL emission times are recorded for both the direct exciton with τ D ≲3 ps and the indirect optical transition with τ I≈25 ps. For temperatures between 4 to 150 K τ I remains constant. Following polarized laser excitation, we observe for the direct exciton transition at the K point of the Brillouin zone efficient optical orientation and alignment during the short emission time τ D. The evolution of the direct exciton polarization and intensity as a function of excitation laser energy is monitored in PL excitation experiments.",

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AU - Wang, G.

AU - Marie, X.

AU - Bouet, L.

AU - Vidal, M.

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AU - Amand, T.

AU - Lagarde, D.

AU - Urbaszek, B.

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AB - We investigate exciton dynamics in WSe2 bilayers in time-resolved photoluminescence (PL) spectroscopy. Fast PL emission times are recorded for both the direct exciton with τ D ≲3 ps and the indirect optical transition with τ I≈25 ps. For temperatures between 4 to 150 K τ I remains constant. Following polarized laser excitation, we observe for the direct exciton transition at the K point of the Brillouin zone efficient optical orientation and alignment during the short emission time τ D. The evolution of the direct exciton polarization and intensity as a function of excitation laser energy is monitored in PL excitation experiments.

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Exciton dynamics in WSe2 bilayers

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Exciton dynamics in WSe₂ bilayers