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  Probing the Fluctuations of Optical Properties in Time-Resolved Spectroscopy

Randi, F., Esposito, M., Giusti, F., Misochko, O., Parmigiani, F., Fausti, D., et al. (2017). Probing the Fluctuations of Optical Properties in Time-Resolved Spectroscopy. Physical Review Letters, 119(18): 187403. doi:10.1103/PhysRevLett.119.187403.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-1587-E Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8FE3-B
Genre: Journal Article

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PhysRevLett.119.187403.pdf (Publisher version), 333KB
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2017
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© American Physical Society
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supplemental.pdf (Supplementary material), 262KB
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https://arxiv.org/abs/1705.08523 (Preprint)
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 Creators:
Randi, F.1, Author
Esposito, M.1, Author
Giusti, F.1, Author
Misochko, O.2, 3, Author
Parmigiani, F.1, 4, 5, Author
Fausti, D.1, 4, Author
Eckstein, M.6, 7, Author              
Affiliations:
1Department of Physics, Università degli Studi di Trieste, ou_persistent22              
2Institute of Solid State Physics, Russian Academy of Sciences, ou_persistent22              
3Moscow Institute of Physics and Technology (State University), ou_persistent22              
4Sincrotrone Trieste SCpA, ou_persistent22              
5International Faculty, Universität zu Köln, ou_persistent22              
6Theory of Correlated Systems out of Equilibrium, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938296              
7Department of Physics, University of Erlangen-Nürnberg, ou_persistent22              

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 Abstract: We show that, in optical pump-probe experiments on bulk samples, the statistical distribution of the intensity of ultrashort light pulses after interaction with a nonequilibrium complex material can be used to measure the time-dependent noise of the current in the system. We illustrate the general arguments for a photoexcited Peierls material. The transient noise spectroscopy allows us to measure to what extent electronic degrees of freedom dynamically obey the fluctuation-dissipation theorem, and how well they thermalize during the coherent lattice vibrations. The proposed statistical measurement developed here provides a new general framework to retrieve dynamical information on the excited distributions in nonequilibrium experiments, which could be extended to other degrees of freedom of magnetic or vibrational origin.

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Language(s): eng - English
 Dates: 2017-05-232017-11-032017-11-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.119.187403
arXiv: 1705.08523
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 119 (18) Sequence Number: 187403 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1