Polarization and time-resolved photoluminescence spectroscopy of excitons in MoSe 2 monolayers - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles Applied Physics Letters Year : 2015

Polarization and time-resolved photoluminescence spectroscopy of excitons in MoSe 2 monolayers

Abstract

We investigate valley exciton dynamics in MoSe2 monolayers in polarization- and time-resolved photoluminescence (PL) spectroscopy at 4 K. Following circularly polarized laser excitation, we record a low circular polarization degree of the PL of typically ≤5%. This is about 10 times lower than the polarization induced under comparable conditions in MoS2 and WSe2 monolayers. The evolution of the exciton polarization as a function of excitation laser energy and power is monitored in PL excitation experiments. Fast PL emission times are recorded for both the neutral exciton of ≤3 ps and for the charged exciton (trion) of 12 ps.
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Dates and versions

hal-02049146 , version 1 (26-02-2019)

Identifiers

  • HAL Id : hal-02049146 , version 1

Cite

Gang Wang, Etienne Palleau, Thierry Amand, S. Tongay, Xavier Marie, et al.. Polarization and time-resolved photoluminescence spectroscopy of excitons in MoSe 2 monolayers. Applied Physics Letters, 2015, 106 (11), pp.112101. ⟨hal-02049146⟩
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