Probing the Fluctuations of Optical Properties in Time-Resolved Spectroscopy

Randi F, Esposito M, Giusti F, Misochko O, Parmigiani F, Fausti D, Eckstein M (2017)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Physical Review Letters American Physical Society

Publisher: AMER PHYSICAL SOC

Book Volume: 119

Journal Issue: 18

DOI: 10.1103/PhysRevLett.119.187403

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.

Authors with CRIS profile

Daniele Fausti
Martin Eckstein Lehrstuhl für Theoretische Festkörperphysik

Involved external institutions

Università degli Studi di Trieste IT Italy (IT) Russian Academy of Sciences / Росси́йская акаде́мия нау́к (RAS) RU Russian Federation (RU)

How to cite

APA:

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

MLA:

Randi, Francesco, et al. "Probing the Fluctuations of Optical Properties in Time-Resolved Spectroscopy." Physical Review Letters 119.18 (2017).

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