Strong-field plasmonic photoemission in the mid-IR at <1 GW/cm2 intensity

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Title:	Strong-field plasmonic photoemission in the mid-IR at <1 GW/cm2 intensity
Author:	Teichmann, S. M.; Rácz, P.; Ciappina, M. F.; Pérez-Hernández, J. A.; Thai, A.; Fekete, J.; Elezzabi, A. Y.; Veisz, L.; Biegert, Jens; Dombi, P.
Other authors:	Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques
Abstract:	We investigated nonlinear photoemission from plasmonic films with femtosecond, mid-infrared pulses at 3.1 mm wavelength. Transition between regimes of multi-photon-induced and tunneling emission is demonstrated at an unprecedentedly low intensity of ,1 GW/cm2 . 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.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica -Plasmons -Nanophotonics and plasmonics -Nonlinear optics -Ultrafast photonics -Plasmons (Física)
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Document type:	Article
Published by:	Nature Publishing group
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