Temporal dynamics of strongly coupled epsilon near-zero systems

Ebrahim, M. H., Marini, A., Bruno, V., Kinsey, N., Khurgin, J. B., Faccio, D. and Clerici, M. (2021) Temporal dynamics of strongly coupled epsilon near-zero systems. Applied Physics Letters, 119(22), 221101. (doi: 10.1063/5.0070296)

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Abstract

Subwavelength epsilon-near-zero (ENZ) films with decorated nanoantennae are an emerging platform for coupling radiation into the ENZ mode: recent experiments have shown how strong coupling between the two systems underpins significant nonlinear effects. Field enhancement and the temporal dynamic of the radiation in ENZ films strongly coupled with plasmonic antennae play a substantial role in the light–matter interaction, and the latter has not yet been fully disclosed. We numerically investigate the pulse shaping of radiation impinging on two representative strongly coupled systems: a transparent conductive oxide with ENZ in the NIR band (ITO) and a polar material with ENZ in the MIR (SiC). In both cases, we demonstrate that the temporal dynamics and field enhancement are particularly pronounced within the strong coupling region, and we highlight the different polarization responses of the ITO-based case from the SiC one. The latter, owing to lower losses, shows extreme reshaping of resonant radiation close to the ENZ spectral region and is, therefore, a promising candidate for slow-light-enhanced effects.

Item Type:Articles
Additional Information:M.H.E. acknowledges the support from the UK Research and Innovation (UKRI) and the UK Engineering and Physical Sciences Research Council (EPSRC), Centre for Doctoral Training in Photonic Integration and Advanced Data Storage (EP/L015323/1). M.C. acknowledges the support from the UKRI and EPSRC (Fellowship “In-Tempo” EP/S001573/1).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ebrahim, Mehdi and Bruno, Mr Vincenzo and Clerici, Dr Matteo and Faccio, Professor Daniele
Authors: Ebrahim, M. H., Marini, A., Bruno, V., Kinsey, N., Khurgin, J. B., Faccio, D., and Clerici, M.
College/School:College of Science and Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Applied Physics Letters
Publisher:AIP Publishing
ISSN:0003-6951
ISSN (Online):1077-3118
Published Online:29 November 2021
Copyright Holders:Copyright © 2021 Author(s).
First Published:First published in Applied Physics Letters 119(22):221101
Publisher Policy:Reproduced in accordance with the publisher copyright policy
Data DOI:10.5525/gla.researchdata.1198

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
172610External engagement manager: CDT Photonic Integration for Advanced Data StorageJohn MarshEngineering and Physical Sciences Research Council (EPSRC)EP/L015323/1ENG - Electronics & Nanoscale Engineering
302459Infrared time-domain quantum opticsMatteo ClericiEngineering and Physical Sciences Research Council (EPSRC)EP/S001573/1ENG - Electronics & Nanoscale Engineering