Transition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets

Abstract Relativistic laser interaction with micro- and nano-scale surface structures enhances energy transfer to solid targets and yields matter in extreme conditions. We report on the comparative study of laser-target interaction mechanisms with wire-structures of different size, revealing a trans...

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Autores principales:	G. Cristoforetti, P. Londrillo, P. K. Singh, F. Baffigi, G. D’Arrigo, Amit D. Lad, R. G. Milazzo, A. Adak, M. Shaikh, D. Sarkar, G. Chatterjee, J. Jha, M. Krishnamurthy, G. R. Kumar, L. A. Gizzi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/93652ad276254bd2bf8a3ffd8b5596b1
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spelling	oai:doaj.org-article:93652ad276254bd2bf8a3ffd8b5596b12021-12-02T16:06:18ZTransition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets10.1038/s41598-017-01677-52045-2322https://doaj.org/article/93652ad276254bd2bf8a3ffd8b5596b12017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01677-5https://doaj.org/toc/2045-2322Abstract Relativistic laser interaction with micro- and nano-scale surface structures enhances energy transfer to solid targets and yields matter in extreme conditions. We report on the comparative study of laser-target interaction mechanisms with wire-structures of different size, revealing a transition from a coherent particle heating to a stochastic plasma heating regime which occurs when migrating from micro-scale to nano-scale wires. Experiments and kinetic simulations show that large gaps between the wires favour the generation of high-energy electrons via laser acceleration into the channels while gaps smaller than the amplitude of electron quivering in the laser field lead to less energetic electrons and multi-keV plasma generation, in agreement with previously published experiments. Plasma filling of nano-sized gaps due to picosecond pedestal typical of ultrashort pulses strongly affects the interaction with this class of targets reducing the laser penetration depth to approximately one hundred nanometers. The two heating regimes appear potentially suitable for laser-driven ion/electron acceleration schemes and warm dense matter investigation respectively.G. CristoforettiP. LondrilloP. K. SinghF. BaffigiG. D’ArrigoAmit D. LadR. G. MilazzoA. AdakM. ShaikhD. SarkarG. ChatterjeeJ. JhaM. KrishnamurthyG. R. KumarL. A. GizziNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q G. Cristoforetti P. Londrillo P. K. Singh F. Baffigi G. D’Arrigo Amit D. Lad R. G. Milazzo A. Adak M. Shaikh D. Sarkar G. Chatterjee J. Jha M. Krishnamurthy G. R. Kumar L. A. Gizzi Transition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets
description	Abstract Relativistic laser interaction with micro- and nano-scale surface structures enhances energy transfer to solid targets and yields matter in extreme conditions. We report on the comparative study of laser-target interaction mechanisms with wire-structures of different size, revealing a transition from a coherent particle heating to a stochastic plasma heating regime which occurs when migrating from micro-scale to nano-scale wires. Experiments and kinetic simulations show that large gaps between the wires favour the generation of high-energy electrons via laser acceleration into the channels while gaps smaller than the amplitude of electron quivering in the laser field lead to less energetic electrons and multi-keV plasma generation, in agreement with previously published experiments. Plasma filling of nano-sized gaps due to picosecond pedestal typical of ultrashort pulses strongly affects the interaction with this class of targets reducing the laser penetration depth to approximately one hundred nanometers. The two heating regimes appear potentially suitable for laser-driven ion/electron acceleration schemes and warm dense matter investigation respectively.
format	article
author	G. Cristoforetti P. Londrillo P. K. Singh F. Baffigi G. D’Arrigo Amit D. Lad R. G. Milazzo A. Adak M. Shaikh D. Sarkar G. Chatterjee J. Jha M. Krishnamurthy G. R. Kumar L. A. Gizzi
author_facet	G. Cristoforetti P. Londrillo P. K. Singh F. Baffigi G. D’Arrigo Amit D. Lad R. G. Milazzo A. Adak M. Shaikh D. Sarkar G. Chatterjee J. Jha M. Krishnamurthy G. R. Kumar L. A. Gizzi
author_sort	G. Cristoforetti
title	Transition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets
title_short	Transition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets
title_full	Transition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets
title_fullStr	Transition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets
title_full_unstemmed	Transition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets
title_sort	transition from coherent to stochastic electron heating in ultrashort relativistic laser interaction with structured targets
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/93652ad276254bd2bf8a3ffd8b5596b1
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Transition from Coherent to Stochastic electron heating in ultrashort relativistic laser interaction with structured targets

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