期刊
SCIENTIFIC REPORTS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep07584
关键词
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资金
- Hungarian Academy of Sciences
- Hungarian Scientific Research Fund [109257, 109472]
- Max Planck Society (Partner Group Program)
- Spanish Ministerio De Economia Y Competitividad (MINECO) [SAUUL-CSD 2007-00013]
- Plan Nacional [FIS2011-30465-C02-01]
- Catalan Agencia de Gestio d'Ajuts Universitaris i de Recerca (AGAUR)
- SGR
- Fundacio Cellex Barcelona
- LASERLAB-EUROPE [228334]
- COST Actions [MP1203, MP1302]
- ICREA Funding Source: Custom
We investigated nonlinear photoemission from plasmonic films with femtosecond, mid-infrared pulses at 3.1 mu m wavelength. Transition between regimes of multi-photon-induced and tunneling emission is demonstrated at an unprecedentedly low intensity of <1 GW/cm(2). Thereby, strong-field nanophysics can be accessed at extremely low intensities by exploiting nanoscale plasmonic field confinement, enhancement and ponderomotive wavelength scaling at the same time. Results agree well with quantum mechanical modelling. Our scheme demonstrates an alternative paradigm and regime in strong-field physics.
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