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

48 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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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.",

author = "G. Wang and X. Marie and L. Bouet and M. Vidal and A. Balocchi and T. Amand and D. Lagarde and B. Urbaszek",

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AU - Wang, G.

AU - Marie, X.

AU - Bouet, L.

AU - Vidal, M.

AU - Balocchi, A.

AU - Amand, T.

AU - Lagarde, D.

AU - Urbaszek, B.

PY - 2014/11/3

Y1 - 2014/11/3

N2 - 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.

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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SN - 0003-6951

VL - 105

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 18

M1 - 182105

ER -

Exciton dynamics in WSe2 bilayers

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Exciton dynamics in WSe₂ bilayers