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. 2018 May 29;8:8238. doi: 10.1038/s41598-018-25906-7

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© The Author(s) 2018

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Intra-excitonic relaxation cascade in MoSe₂. A pump pulse with an energy close to the single-particle band gap excites quasi-free electron-hole pairs at the scattering continuum (yellow arrow). The hot electron-hole pairs dissipate energy via a sequence of phonon emissions, performing a cascade-like relaxation through energetically lower lying exciton states (orange arrows) including indirect KΛ excitons.