Reference : Active control of ultrafast electron dynamics in plasmonic gaps using an applied bias

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/46940

Title :	Active control of ultrafast electron dynamics in plasmonic gaps using an applied bias
Language :	English
Author, co-author :	Ludwig, Markus [Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany]
	K. Kazansky, Andrey [Donostia International Physics Center DIPC, Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain > > > ; IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain]
	Aguirregabiria, Garikoitz [Material Physics Center CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastián, Spain]
	Codruta Marinica, Dana [Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, 91405 Orsay, France]
	Falk, Matthias [Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany]
	Leitenstorfer, Alfred [Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany]
	Brida, Daniele [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) > ; Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany]
	Aizpurua, Javier [Donostia International Physics Center DIPC, Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain > > > ; Material Physics Center CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastián, Spain]
	G. Borisov, Andrei [Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, 91405 Orsay, France]
Publication date :	24-Jun-2020
Journal title :	Physical Review. B, Condensed Matter
Publisher :	American Physical Society
Peer reviewed :	Yes
ISSN :	0163-1829
e-ISSN :	1095-3795
City :	New York
Country :	MD
Abstract :	[en] In this joint experimental and theoretical study we demonstrate coherent control of the optical field emission and electron transport in plasmonic gaps subjected to intense single-cycle laser pulses. Our results show that an external THz field or a minor dc bias, orders of magnitude smaller than the optical bias owing to the laser field, allows one to modulate and direct the electron photocurrents in the gap of a connected nanoantenna operating as an ultrafast nanoscale vacuum diode for lightwave electronics. Using time-dependent density functional theory calculations we elucidate the main physical mechanisms behind the observed effects and show that an applied dc field significantly modifies the optical field emission and quiver motion of photoemitted electrons within the gap. The quantum many-body theory reproduces the measured net electron transport in the experimental device, which allows us to establish a paradigm for controlling nanocircuits at petahertz frequencies
Permalink :	http://hdl.handle.net/10993/46940
DOI :	10.1103/PhysRevB.101.241412

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