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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2017-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-06491-7 |
| _version_ | 1818845688831672320 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-19T05:33:38Z |
| format | Article |
| id | doaj.art-fdcc7ad2236e4263952d505e051e101e |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-19T05:33:38Z |
| publishDate | 2017-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-fdcc7ad2236e4263952d505e051e101e2022-12-21T20:34:11ZengNature PortfolioScientific Reports2045-23222017-07-01711810.1038/s41598-017-06491-7Nano-plasmonic near field phase matching of attosecond pulsesTahir Shaaran0Rana Nicolas1Bianca Iwan2Milutin Kovacev3Hamed Merdji4LIDYL, CEA, CNRS, Université Paris-SaclayLIDYL, CEA, CNRS, Université Paris-SaclayLIDYL, CEA, CNRS, Université Paris-SaclayLeibniz Universität Hannover, Institut für QuantenoptikLIDYL, CEA, CNRS, Université Paris-SaclayAbstract 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.https://doi.org/10.1038/s41598-017-06491-7 |
| spellingShingle | Tahir Shaaran Rana Nicolas Bianca Iwan Milutin Kovacev Hamed Merdji Nano-plasmonic near field phase matching of attosecond pulses Scientific Reports |
| title | 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_short | Nano-plasmonic near field phase matching of attosecond pulses |
| title_sort | nano plasmonic near field phase matching of attosecond pulses |
| url | https://doi.org/10.1038/s41598-017-06491-7 |
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