Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films

Vacuum fluctuation-induced interactions between macroscopic metallic objects result in an attractive force between them, a phenomenon known as the Casimir effect. This force is the result of both plasmonic and photonic modes. For very thin films, field penetration through the films will modify the a...

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Autores: Gong, Tao, Liberal Olleta, Íñigo, Spreng, Benjamin, Camacho, Miguel, Engheta, Nader, Munday, Jeremy N.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Universidad Pública de Navarra
Repositorio:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:academica-e.unavarra.es:2454/46549
Acceso en línea:https://hdl.handle.net/2454/46549
Access Level:acceso abierto
Palabra clave:Ultrathin films
Epsilon-near-zero modes
Casimir interaction
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spelling Effect of epsilon-near-zero modes on the casimir interaction between ultrathin filmsGong, TaoLiberal Olleta, ÍñigoSpreng, BenjaminCamacho, MiguelEngheta, NaderMunday, Jeremy N.Ultrathin filmsEpsilon-near-zero modesCasimir interactionVacuum fluctuation-induced interactions between macroscopic metallic objects result in an attractive force between them, a phenomenon known as the Casimir effect. This force is the result of both plasmonic and photonic modes. For very thin films, field penetration through the films will modify the allowed modes. Here, we theoretically investigate the Casimir interaction between ultrathin films from the perspective of force distribution over real frequencies for the first time. Pronounced repulsive contributions to the force are found due to the highly confined and nearly dispersion-free epsilon-near-zero (ENZ) modes that only exist in ultrathin films. These contributions persistently occur around the ENZ frequency of the film irrespective of the interfilm separation. We further associate the ENZ modes with a striking thickness dependence of a proposed figure of merit (FOM) for conductive thin films, suggesting that the motion of objects induced by Casimir interactions is boosted for deeply nanoscale sizes. Our results shed light on the correlation between special electromagnetic modes and the vacuum fluctuation-induced force as well as the resulting mechanical properties of ultrathin ENZ materials, which may create new opportunities for engineering the motion of ultrasmall objects in nanomechanical systems.The authors acknowledge financial support from the Defense Advanced Research Projects Agency (DARPA) QUEST program Grant No. HR00112090084.American Physical SocietyInstitute of Smart Cities - ISC2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2454/46549reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglés© 2023 American Physical Societyinfo:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/465492026-06-17T12:41:47Z
dc.title.none.fl_str_mv Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films
title Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films
spellingShingle Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films
Gong, Tao
Ultrathin films
Epsilon-near-zero modes
Casimir interaction
title_short Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films
title_full Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films
title_fullStr Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films
title_full_unstemmed Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films
title_sort Effect of epsilon-near-zero modes on the casimir interaction between ultrathin films
dc.creator.none.fl_str_mv Gong, Tao
Liberal Olleta, Íñigo
Spreng, Benjamin
Camacho, Miguel
Engheta, Nader
Munday, Jeremy N.
author Gong, Tao
author_facet Gong, Tao
Liberal Olleta, Íñigo
Spreng, Benjamin
Camacho, Miguel
Engheta, Nader
Munday, Jeremy N.
author_role author
author2 Liberal Olleta, Íñigo
Spreng, Benjamin
Camacho, Miguel
Engheta, Nader
Munday, Jeremy N.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Institute of Smart Cities - ISC
dc.subject.none.fl_str_mv Ultrathin films
Epsilon-near-zero modes
Casimir interaction
topic Ultrathin films
Epsilon-near-zero modes
Casimir interaction
description Vacuum fluctuation-induced interactions between macroscopic metallic objects result in an attractive force between them, a phenomenon known as the Casimir effect. This force is the result of both plasmonic and photonic modes. For very thin films, field penetration through the films will modify the allowed modes. Here, we theoretically investigate the Casimir interaction between ultrathin films from the perspective of force distribution over real frequencies for the first time. Pronounced repulsive contributions to the force are found due to the highly confined and nearly dispersion-free epsilon-near-zero (ENZ) modes that only exist in ultrathin films. These contributions persistently occur around the ENZ frequency of the film irrespective of the interfilm separation. We further associate the ENZ modes with a striking thickness dependence of a proposed figure of merit (FOM) for conductive thin films, suggesting that the motion of objects induced by Casimir interactions is boosted for deeply nanoscale sizes. Our results shed light on the correlation between special electromagnetic modes and the vacuum fluctuation-induced force as well as the resulting mechanical properties of ultrathin ENZ materials, which may create new opportunities for engineering the motion of ultrasmall objects in nanomechanical systems.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/46549
url https://hdl.handle.net/2454/46549
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv © 2023 American Physical Society
info:eu-repo/semantics/openAccess
rights_invalid_str_mv © 2023 American Physical Society
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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