Publicação
Casimir-mediated amplification of flexural modes in suspended graphene
| authorProfile.email | biblioteca@isel.pt | |
| datacite.subject.fos | Ciências Naturais::Ciências Físicas | |
| dc.contributor.author | Ribeiro, Sofia | |
| dc.contributor.author | Terças, Hugo | |
| dc.date.accessioned | 2026-10-16T11:54:57Z | |
| dc.date.available | 2026-10-16T11:54:57Z | |
| dc.date.issued | 2026-09-15 | |
| dc.description.abstract | We develop a minimal theoretical framework to describe near-field Casimir-mediated coupling between two suspended nanomembranes: a graphene sheet and a gold-coated GaAs membrane separated by a micrometer-scale vacuum gap. Coherent excitation of flexural (out-of-plane) modes in the gold membrane, provided by an external piezoelectric drive, enables efficient energy transfer to graphene through static vacuum electromagnetic coupling. Using a coupled-mode description equivalent to the classical equations of motion, we identify hybridized flexural modes exhibiting avoided crossings, tunable spectral response, and drive-dependent energy exchange. Under experimentally accessible conditions, Casimir-mediated mode hybridisation transfers energy from the driven gold membrane to graphene at rates comparable to or exceeding the intrinsic mechanical losses of graphene, resulting in a strong enhancement of its flexural response and linewidth narrowing. The Casimir interaction acts here solely as a static, non-contact coupling mechanism, while all energy is supplied externally through coherent mechanical driving, yielding drive-induced amplification without intrinsic negative damping. Our results establish Casimir coupling as a practical resource for controlling flexural dynamics in graphene nanomembranes and provide a platform for non-contact energy transfer and mode-selective amplification in two-dimensional mechanical systems. | eng |
| dc.identifier.citation | Ribeiro, S., Terças, H. (2026). Casimir-mediated amplification of flexural modes in suspended graphene. Nanoscales Advances, 8(18), 5277-5296. https://doi.org/10.1039/d6na00471g | |
| dc.identifier.doi | 10.1039/d6na00471g | |
| dc.identifier.issn | 2516-0230 | |
| dc.identifier.uri | http://hdl.handle.net/10400.21/23227 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | Royal Society of Chemistry | |
| dc.relation.hasversion | https://pubs.rsc.org/na/article/8/18/5277/1292420/Casimir-mediated-amplification-of-flexural-modes | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.subject | Casimir-mediated | |
| dc.subject | Graphene sheet | |
| dc.subject | Gold-coated GaAs membrane | |
| dc.subject | Micrometer-scale vacuum gap | |
| dc.title | Casimir-mediated amplification of flexural modes in suspended graphene | eng |
| dc.type | research article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 5296 | |
| oaire.citation.issue | 18 | |
| oaire.citation.startPage | 5277 | |
| oaire.citation.title | Nanoscale Advances | |
| oaire.citation.volume | 8 | |
| oaire.version | http://purl.org/coar/version/c_be7fb7dd8ff6fe43 | |
| person.familyName | Terças | |
| person.givenName | Hugo | |
| person.identifier.ciencia-id | C71E-095B-5526 | |
| person.identifier.orcid | 0000-0003-2826-4377 | |
| person.identifier.scopus-author-id | 25422891900 | |
| relation.isAuthorOfPublication | 2f114220-838c-4bf4-827d-88fc1afcf069 | |
| relation.isAuthorOfPublication.latestForDiscovery | 2f114220-838c-4bf4-827d-88fc1afcf069 |