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Article Dans Une Revue Advanced Science Année : 2022

Destructive photon echo formation in six-wave mixing signals of a MoSe 2 monolayer

Résumé

Monolayers of transition metal dichalcogenides display a strong excitonic optical response. Additionally encapsulating the monolayer with hexagonal boron nitride allows to reach the limit of a purely homogeneously broadened exciton system. On such a MoSe 2-based system we perform ultrafast six-wave mixing spectroscopy and find a novel destructive photon echo effect. This process manifests as a characteristic depression of the nonlinear signal dynamics when scanning the delay between the applied laser pulses. By theoretically describing the process within a local field model we reach an excellent agreement with the experiment. We develop an effective Bloch vector representation and thereby demonstrate that the destructive photon echo stems from a destructive interference of successive repetitions of the heterodyning experiment.
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Dates et versions

hal-03381714 , version 1 (17-10-2021)

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Thilo Hahn, Diana Vaclavkova, Miroslav Bartos, Karol Nogajewski, Marek Potemski, et al.. Destructive photon echo formation in six-wave mixing signals of a MoSe 2 monolayer. Advanced Science, 2022, 9 (1), pp.2103813. ⟨10.1002/advs.202103813⟩. ⟨hal-03381714⟩
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