Journal
SCIENTIFIC REPORTS
Volume 10, Issue 1, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-020-69761-x
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Funding
- National Research, Development and Innovation Office (NKFIH) [2018-1.2.1-NKP-2018-00012, VEKOP-2.3.2-16-2017-00015, K116362, EFOP-3.6.2-16-201700005]
- University of Szeged Open Access Fund [4810]
- Extreme Light Infrastructure Attosecond Light Pulse Source project [GINOP-2.3.6-15-2015-00001]
- PETACom project of the European Union (H2020, FET Open)
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences
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The generation of few-cycle laser pulses proved to be a key enabling technology in strong-field physics and ultrafast science. The question naturally arises whether one can induce few-cycle localized plasmon oscillations in optical near-fields. Here, we perform a comparative study of different plasmonic nanoresonators illuminated by few-cycle pulses. We analyze the number of cycles (NOC) of the plasmonic field, the near-field enhancement (NFE) as well as the figure of merit NFE/NOC. The pulse length dependence of these quantities is also investigated. Throughout the inspected pulse-length interval silica-gold and silica-silver core-shell monomers have the potential to preserve the NOC of the incoming pulse, silver bow-ties result in the highest NFE, whereas gold core-shell dimers have the highest NFE/NOC. Based on the analysis, silver bow-ties, gold core-shell and silver nanorod dimers proved to be the most suitable for few-cycle near-field amplification.
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