Negative refraction in time-varying strongly coupled plasmonic-antenna-Epsilon-Near-Zero systems

Bruno, V. et al. (2020) Negative refraction in time-varying strongly coupled plasmonic-antenna-Epsilon-Near-Zero systems. Physical Review Letters, 124(4), 043902. (doi: 10.1103/PhysRevLett.124.043902)

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Time-varying metasurfaces are emerging as a powerful instrument for the dynamical control of the electromagnetic properties of a propagating wave. Here we demonstrate an efficient time-varying metasurface based on plasmonic nano-antennas strongly coupled to an epsilon-near-zero (ENZ) deeply subwavelength film. The plasmonic resonance of the metal resonators strongly interacts with the optical ENZ modes, providing a Rabi level spitting of ∼30%. Optical pumping at frequency ω induces a nonlinear polarization oscillating at 2ω responsible for an efficient generation of a phase conjugate and a negative refracted beam with a conversion efficiency that is more than 4 orders of magnitude greater compared to the bare ENZ film. The introduction of a strongly coupled plasmonic system therefore provides a simple and effective route towards the implementation of ENZ physics at the nanoscale.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Bruno, Mr Vincenzo and Clerici, Professor Matteo and Shah, Dr Yash Diptesh and Vezzoli, Dr Stefano and Faccio, Professor Daniele
Authors: Bruno, V., DeVault, C., Vezzoli, S., Kudyshev, Z., Huq, T., Mignuzzi, S., Jacassi, A., Saha, S., Shah, Y.D., Maier, S.A., Cumming, D.R.S., Boltasseva, A., Ferrera, M., Clerici, M., Faccio, D., Sapienza, R., and Shalaev, V.M.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114
Published Online:30 January 2020
Copyright Holders:Copyright © 2020 American Physical Society
First Published:First published in Physical Review Letters 124(4): 043902
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
303022The Physics and Technology of Photonic Metadevices and MetasystemsDaniele FaccioEngineering and Physical Sciences Research Council (EPSRC)Ref:515132 EP/M009122/2P&S - Physics & Astronomy
302459Infrared time-domain quantum opticsMatteo ClericiEngineering and Physical Sciences Research Council (EPSRC)EP/S001573/1ENG - Electronics & Nanoscale Engineering