Article (Scientific journals)
Ultrafast all-optical switching enabled by epsilon-near-zero-tailored absorption in metal-insulator nanocavities
Kuttruff, Joel; Garoli, Denis; Allerbeck, Jonas et al.
2020In Communications Physics, 3, p. 114
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Abstract :
[en] Ultrafast control of light−matter interactions is fundamental in view of new technological frontiers of information processing. However, conventional optical elements are either static or feature switching speeds that are extremely low with respect to the time scales at which it is possible to control light. Here, we exploit the artificial epsilon-near-zero (ENZ) modes of a metal-insulator-metal nanocavity to tailor the linear photon absorption of our system and realize a nondegenerate all-optical ultrafast modulation of the reflectance at a specific wavelength. Optical pumping of the system at its high energy ENZ mode leads to a strong redshift of the low energy mode because of the transient increase of the local dielectric function, which leads to a sub-3-ps control of the reflectance at a specific wavelength with a relative modulation depth approaching 120%.
Disciplines :
Physics
Author, co-author :
Kuttruff, Joel;  University of Konstanz
Garoli, Denis;  Istituto Italiano di Tecnologia
Allerbeck, Jonas;  University of Konstanz
Krahne, Roman;  Istituto Italiano di Tecnologia
De Luca, Antonio;  Università della Calabria
Brida, Daniele ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Caligiuri, Vincenzo;  Università della Calabria
Maccaferri, Nicolò ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
External co-authors :
yes
Language :
English
Title :
Ultrafast all-optical switching enabled by epsilon-near-zero-tailored absorption in metal-insulator nanocavities
Publication date :
2020
Journal title :
Communications Physics
ISSN :
2399-3650
Publisher :
Nature Publishing Group, United Kingdom
Volume :
3
Pages :
114
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Funders :
FNR - Fonds National de la Recherche [LU]
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