Nano-plasmonic near field phase matching of attosecond pulses

Abstract Nano-structures excited by light can enhance locally the electric field when tuned to plasmonic resonances. This phenomenon can be used to boost non-linear processes such as harmonic generation in crystals or in gases, Raman excitation, and four wave mixing. Here we present a theoretical in...

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Autores principales:	Tahir Shaaran, Rana Nicolas, Bianca Iwan, Milutin Kovacev, Hamed Merdji
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fdcc7ad2236e4263952d505e051e101e
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spelling	oai:doaj.org-article:fdcc7ad2236e4263952d505e051e101e2021-12-02T12:32:19ZNano-plasmonic near field phase matching of attosecond pulses10.1038/s41598-017-06491-72045-2322https://doaj.org/article/fdcc7ad2236e4263952d505e051e101e2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06491-7https://doaj.org/toc/2045-2322Abstract Nano-structures excited by light can enhance locally the electric field when tuned to plasmonic resonances. This phenomenon can be used to boost non-linear processes such as harmonic generation in crystals or in gases, Raman excitation, and four wave mixing. Here we present a theoretical investigation of the near-field phase matching of attosecond pulses emitted by high-order harmonic generation (HHG) of an atom immersed in a multi-cycle femtosecond infrared laser field and a spatially inhomogeneous plasmonic field. We demonstrate that the spatial inhomogeneity factor of the plasmonic field strongly affects the electron trajectory and recombination time which can be used to control the attosecond emission. For further insight into the plasmonic field effect, we monitor the phase of each quantum path as a function of the inhomogeneity strength. Moreover, we investigate the attosecond emission as a function of near-field phase matching effects. This is achieved by calculating the coherent field superposition of attosecond pulses emitted from various intensities or field inhomogeneities. Finally, far-field and near-field phase matching effects are combined to modulate the harmonic spectral phase towards the emission of a single attosecond pulse.Tahir ShaaranRana NicolasBianca IwanMilutin KovacevHamed MerdjiNature 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 Tahir Shaaran Rana Nicolas Bianca Iwan Milutin Kovacev Hamed Merdji Nano-plasmonic near field phase matching of attosecond pulses
description	Abstract Nano-structures excited by light can enhance locally the electric field when tuned to plasmonic resonances. This phenomenon can be used to boost non-linear processes such as harmonic generation in crystals or in gases, Raman excitation, and four wave mixing. Here we present a theoretical investigation of the near-field phase matching of attosecond pulses emitted by high-order harmonic generation (HHG) of an atom immersed in a multi-cycle femtosecond infrared laser field and a spatially inhomogeneous plasmonic field. We demonstrate that the spatial inhomogeneity factor of the plasmonic field strongly affects the electron trajectory and recombination time which can be used to control the attosecond emission. For further insight into the plasmonic field effect, we monitor the phase of each quantum path as a function of the inhomogeneity strength. Moreover, we investigate the attosecond emission as a function of near-field phase matching effects. This is achieved by calculating the coherent field superposition of attosecond pulses emitted from various intensities or field inhomogeneities. Finally, far-field and near-field phase matching effects are combined to modulate the harmonic spectral phase towards the emission of a single attosecond pulse.
format	article
author	Tahir Shaaran Rana Nicolas Bianca Iwan Milutin Kovacev Hamed Merdji
author_facet	Tahir Shaaran Rana Nicolas Bianca Iwan Milutin Kovacev Hamed Merdji
author_sort	Tahir Shaaran
title	Nano-plasmonic near field phase matching of attosecond pulses
title_short	Nano-plasmonic near field phase matching of attosecond pulses
title_full	Nano-plasmonic near field phase matching of attosecond pulses
title_fullStr	Nano-plasmonic near field phase matching of attosecond pulses
title_full_unstemmed	Nano-plasmonic near field phase matching of attosecond pulses
title_sort	nano-plasmonic near field phase matching of attosecond pulses
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/fdcc7ad2236e4263952d505e051e101e
work_keys_str_mv	AT tahirshaaran nanoplasmonicnearfieldphasematchingofattosecondpulses AT rananicolas nanoplasmonicnearfieldphasematchingofattosecondpulses AT biancaiwan nanoplasmonicnearfieldphasematchingofattosecondpulses AT milutinkovacev nanoplasmonicnearfieldphasematchingofattosecondpulses AT hamedmerdji nanoplasmonicnearfieldphasematchingofattosecondpulses
_version_	1718394134857777152

Nano-plasmonic near field phase matching of attosecond pulses

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