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: | Bruno, Mr Vincenzo and Haji Ebrahim, Mehdi and Faccio, Professor Daniele and Clerici, Professor Matteo |
| 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 |
| 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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