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Dynamical Control of Broadband Coherent Absorption in ENZ Films
Interferometric effects between two counter-propagating beams incident on an optical system can lead to a coherent modulation of the absorption of the total electromagnetic radiation with 100% efficiency even in deeply subwavelength structures. Coherent perfect absorption (CPA) rises from a resonant...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7020079/ https://www.ncbi.nlm.nih.gov/pubmed/31968578 http://dx.doi.org/10.3390/mi11010110 |
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author | Bruno, Vincenzo Vezzoli, Stefano DeVault, Clayton Roger, Thomas Ferrera, Marcello Boltasseva, Alexandra Shalaev, Vladimir M. Faccio, Daniele |
author_facet | Bruno, Vincenzo Vezzoli, Stefano DeVault, Clayton Roger, Thomas Ferrera, Marcello Boltasseva, Alexandra Shalaev, Vladimir M. Faccio, Daniele |
author_sort | Bruno, Vincenzo |
collection | PubMed |
description | Interferometric effects between two counter-propagating beams incident on an optical system can lead to a coherent modulation of the absorption of the total electromagnetic radiation with 100% efficiency even in deeply subwavelength structures. Coherent perfect absorption (CPA) rises from a resonant solution of the scattering matrix and often requires engineered optical properties. For instance, thin film CPA benefits from complex nanostructures with suitable resonance, albeit at a loss of operational bandwidth. In this work, we theoretically and experimentally demonstrate a broadband CPA based on light-with-light modulation in epsilon-near-zero (ENZ) subwavelength films. We show that unpatterned ENZ films with different thicknesses exhibit broadband CPA with a near-unity maximum value located at the ENZ wavelength. By using Kerr optical nonlinearities, we dynamically tune the visibility and peak wavelength of the total energy modulation. Our results based on homogeneous thick ENZ media open a route towards on-chip devices that require efficient light absorption and dynamical tunability. |
format | Online Article Text |
id | pubmed-7020079 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70200792020-03-09 Dynamical Control of Broadband Coherent Absorption in ENZ Films Bruno, Vincenzo Vezzoli, Stefano DeVault, Clayton Roger, Thomas Ferrera, Marcello Boltasseva, Alexandra Shalaev, Vladimir M. Faccio, Daniele Micromachines (Basel) Article Interferometric effects between two counter-propagating beams incident on an optical system can lead to a coherent modulation of the absorption of the total electromagnetic radiation with 100% efficiency even in deeply subwavelength structures. Coherent perfect absorption (CPA) rises from a resonant solution of the scattering matrix and often requires engineered optical properties. For instance, thin film CPA benefits from complex nanostructures with suitable resonance, albeit at a loss of operational bandwidth. In this work, we theoretically and experimentally demonstrate a broadband CPA based on light-with-light modulation in epsilon-near-zero (ENZ) subwavelength films. We show that unpatterned ENZ films with different thicknesses exhibit broadband CPA with a near-unity maximum value located at the ENZ wavelength. By using Kerr optical nonlinearities, we dynamically tune the visibility and peak wavelength of the total energy modulation. Our results based on homogeneous thick ENZ media open a route towards on-chip devices that require efficient light absorption and dynamical tunability. MDPI 2020-01-20 /pmc/articles/PMC7020079/ /pubmed/31968578 http://dx.doi.org/10.3390/mi11010110 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Bruno, Vincenzo Vezzoli, Stefano DeVault, Clayton Roger, Thomas Ferrera, Marcello Boltasseva, Alexandra Shalaev, Vladimir M. Faccio, Daniele Dynamical Control of Broadband Coherent Absorption in ENZ Films |
title | Dynamical Control of Broadband Coherent Absorption in ENZ Films |
title_full | Dynamical Control of Broadband Coherent Absorption in ENZ Films |
title_fullStr | Dynamical Control of Broadband Coherent Absorption in ENZ Films |
title_full_unstemmed | Dynamical Control of Broadband Coherent Absorption in ENZ Films |
title_short | Dynamical Control of Broadband Coherent Absorption in ENZ Films |
title_sort | dynamical control of broadband coherent absorption in enz films |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7020079/ https://www.ncbi.nlm.nih.gov/pubmed/31968578 http://dx.doi.org/10.3390/mi11010110 |
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