# Exciton dynamics in atomically thin MoS2: inter-excitonic interaction and broadening kinetics

Source: [Exciton dynamics in atomically thin MoS2: inter-excitonic interaction and broadening kinetics](<https://www.sota2.com/research/paper/68fa30fb1e209131ce87a7a7>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T18:33:39.150Z

Authors: Sangwan Sim, Jusang Park, Jeong-Gyu Song, Chihun In, Yun-Shik Lee, Hyungjun Kim, Hyunyong Choi

Published: 2013-08-09T02:48:15.000Z

## Abstract

We report ultrafast pump-probe spectroscopy examining exciton dynamics in atomically thin MoS2. Spectrally- and temporally-resolved measurements are performed to investigate the interaction dynamics of two important direct-gap excitons (A and B) and their associated broadening kinetics. The two excitons show strongly correlated inter-excitonic dynamic, in which the transient blue-shifted excitonic absorption originates from the internal A-B excitonic interaction. The observed complex spectral response is determined by the exciton collision-induced linewidth broadening; the broadening of the B exciton linewidth in turn lowers the peak spectral amplitude of the A exciton. Resonant excitation at the B exciton energy reveals that inter-excitonic scattering plays a more important role in determining the broadening kinetics than free-carrier scattering.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1308.2023>)

[PDF](<https://arxiv.org/pdf/1308.2023.pdf>)