Strong-field plasmonic photoemission in the mid-IR at <1 GW/cm(2) intensity

We investigated nonlinear photoemission from plasmonic films with femtosecond, mid-infrared pulses at 3.1 μm 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...

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Detalles Bibliográficos
Autores principales: Teichmann, S. M., Rácz, P., Ciappina, M. F., Pérez-Hernández, J. A., Thai, A., Fekete, J., Elezzabi, A. Y., Veisz, L., Biegert, J., Dombi, P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4290083/
https://www.ncbi.nlm.nih.gov/pubmed/25579608
http://dx.doi.org/10.1038/srep07584
Descripción
Sumario:We investigated nonlinear photoemission from plasmonic films with femtosecond, mid-infrared pulses at 3.1 μm 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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