Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium

Evaluating the optical properties of matter under the action of ultrafast light is crucial in modeling laser–surface interaction and interpreting laser processing experiments. We report optimized coefficients for the Drude-Lorentz model describing the permittivity of several transition metals (Cr, W...

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Autores principales:	Elena Silaeva, Louis Saddier, Jean-Philippe Colombier
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Drude-Lorentz model ab initio optical properties ultrafast-laser excitation transition metals nanostructuring Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/bd4af8c531a448239154b3be6884d030
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spelling	oai:doaj.org-article:bd4af8c531a448239154b3be6884d0302021-11-11T15:00:17ZDrude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium10.3390/app112199022076-3417https://doaj.org/article/bd4af8c531a448239154b3be6884d0302021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/9902https://doaj.org/toc/2076-3417Evaluating the optical properties of matter under the action of ultrafast light is crucial in modeling laser–surface interaction and interpreting laser processing experiments. We report optimized coefficients for the Drude-Lorentz model describing the permittivity of several transition metals (Cr, W, Ti, Fe, Au, and Ni) under electron-phonon nonequilibrium, with electrons heated up to 30,000 K and the lattice staying cold at 300 K. A Basin-hopping algorithm is used to fit the Drude-Lorentz model to the nonequilibrium permittivity calculated using ab initio methods. The fitting coefficients are provided and can be easily inserted into any calculation requiring the optical response of the metals during ultrafast irradiation. Moreover, our results shed light on the electronic structure modifications and the relative contributions of intraband and interband optical transitions at high electron temperatures corresponding to the laser excitation fluence used for surface nanostructuring.Elena SilaevaLouis SaddierJean-Philippe ColombierMDPI AGarticleDrude-Lorentz modelab initiooptical propertiesultrafast-laser excitationtransition metalsnanostructuringTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 9902, p 9902 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Drude-Lorentz model ab initio optical properties ultrafast-laser excitation transition metals nanostructuring Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	Drude-Lorentz model ab initio optical properties ultrafast-laser excitation transition metals nanostructuring Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Elena Silaeva Louis Saddier Jean-Philippe Colombier Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium
description	Evaluating the optical properties of matter under the action of ultrafast light is crucial in modeling laser–surface interaction and interpreting laser processing experiments. We report optimized coefficients for the Drude-Lorentz model describing the permittivity of several transition metals (Cr, W, Ti, Fe, Au, and Ni) under electron-phonon nonequilibrium, with electrons heated up to 30,000 K and the lattice staying cold at 300 K. A Basin-hopping algorithm is used to fit the Drude-Lorentz model to the nonequilibrium permittivity calculated using ab initio methods. The fitting coefficients are provided and can be easily inserted into any calculation requiring the optical response of the metals during ultrafast irradiation. Moreover, our results shed light on the electronic structure modifications and the relative contributions of intraband and interband optical transitions at high electron temperatures corresponding to the laser excitation fluence used for surface nanostructuring.
format	article
author	Elena Silaeva Louis Saddier Jean-Philippe Colombier
author_facet	Elena Silaeva Louis Saddier Jean-Philippe Colombier
author_sort	Elena Silaeva
title	Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium
title_short	Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium
title_full	Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium
title_fullStr	Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium
title_full_unstemmed	Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium
title_sort	drude-lorentz model for optical properties of photoexcited transition metals under electron-phonon nonequilibrium
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/bd4af8c531a448239154b3be6884d030
work_keys_str_mv	AT elenasilaeva drudelorentzmodelforopticalpropertiesofphotoexcitedtransitionmetalsunderelectronphononnonequilibrium AT louissaddier drudelorentzmodelforopticalpropertiesofphotoexcitedtransitionmetalsunderelectronphononnonequilibrium AT jeanphilippecolombier drudelorentzmodelforopticalpropertiesofphotoexcitedtransitionmetalsunderelectronphononnonequilibrium
_version_	1718437923320233984

Drude-Lorentz Model for Optical Properties of Photoexcited Transition Metals under Electron-Phonon Nonequilibrium

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