Polarization and time-resolved photoluminescence spectroscopy of excitons in MoSe2 monolayers
By Gang Wang, É. Palleau, T. Amand, S. Tongay, Xavier Marie, Bernhard Urbaszek. 2015
158 citations recorded by the source corpus.
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.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/faa1124b8b4b38f9393070b4fa0912f8f4d0a902
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In Electrical and Electronic Engineering
In Materials Chemistry
Citations in the corpus
- Optical properties of atomically thin transition metal dichalcogenides: observations and puzzles (2016, background): “Whereas more or less efficient optical orientation is easily observed for WSe2, WS2, and MoS2 monolayers [20, 68, 69], the polarization memory effects are practically absent in MoSe2 and MoTe2 monolayers [112, 113].”