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  Reconstruction of ultrafast exciton dynamics with a phase-retrieval algorithm

Dolso, G. L., Moio, B., Inzani, G., Di Palo, N., Sato, S., Borrego-Varillas, R., et al. (2022). Reconstruction of ultrafast exciton dynamics with a phase-retrieval algorithm. Optics Express, 30(8), 12248-12267. doi:10.1364/OE.451759.

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Genre: Journal Article

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oe-30-8-12248.pdf (Publisher version), 5MB
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Copyright Date:
2022
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© Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

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https://doi.org/10.1364/OE.451759 (Publisher version)
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https://arxiv.org/abs/2107.08202 (Preprint)
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 Creators:
Dolso, G. L.1, Author
Moio, B.1, 2, Author
Inzani, Giacomo1, Author
Di Palo, N.1, 2, Author
Sato, S.3, 4, Author              
Borrego-Varillas, R.2, Author
Nisoli, M.1, 2, Author
Lucchini, M.1, 2, Author
Affiliations:
1Department of Physics, Politecnico di Milano, ou_persistent22              
2Institute for Photonics and Nanotechnologies, IFN-CN, ou_persistent22              
3Center for Computational Sciences, University of Tsukuba, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              

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 Abstract: The first step to gain optical control over the ultrafast processes initiated by light in solids is a correct identification of the physical mechanisms at play. Among them, exciton formation has been identified as a crucial phenomenon which deeply affects the electro-optical properties of most semiconductors and insulators of technological interest. While recent experiments based on attosecond spectroscopy techniques have demonstrated the possibility to observe the early-stage exciton dynamics, the description of the underlying exciton properties remains non-trivial. In this work we propose a new method called extended Ptychographic Iterative engine for eXcitons (ePIX), capable of reconstructing the main physical properties which determine the evolution of the quasi-particle with no prior knowledge of the exact relaxation dynamics or the pump temporal characteristics. By demonstrating its accuracy even when the exciton dynamics is comparable to the pump pulse duration, ePIX is established as a powerful approach to widen our knowledge of solid-state physics.

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Language(s): eng - English
 Dates: 2022-03-042022-01-142022-03-042022-03-282022-04-11
 Publication Status: Published in print
 Pages: 20
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1364/OE.451759
arXiv: 2107.08202
 Degree: -

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Project name : -
Grant ID : 848411
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

Source 1

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Title: Optics Express
  Abbreviation : Opt. Express
Source Genre: Journal
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Publ. Info: Washington, DC : Optical Society of America
Pages: - Volume / Issue: 30 (8) Sequence Number: - Start / End Page: 12248 - 12267 Identifier: ISSN: 1094-4087
CoNE: https://pure.mpg.de/cone/journals/resource/954925609918