Publication
Electromagnetic properties of a monolayer of polarisable particles deposited on graphene
| Summary: | We theoretically predict several plasmonic effects that arise when a monolayer of small polarisable particles is deposited on graphene, related to surface plasmon-polaritons (SPPs) supported by the latter in the terahertz (THz) spectral range. The electromagnetic coupling between graphene SPPs and dipole moments of the nanoparticles (NPs) gives rise to optical properties that are not present in the individual components of this system. The polarisation characteristics of the particles are modified, namely: (i) individual NP’s polarisability is renormalized and (ii) their dipole-dipole interaction includes, beyond the usual ∝ ρ−3 term (ρ is the particleparticle distance), an indirect particle-particle coupling arises via polarisation charges induced on the graphenecovered interface by each particle – this indirect coupling oscillates with the interparticle distance. We derived coupled-dipole equations taking into account all these effects, allowing us to calculate an effective optical conductivity of the particles’ monolayer and study the optical properties of the composite (G+NPs) system. One of the G+NPs system’s unique features is a collective resonant mode, causing a considerable enhancement of the THz radiation absorption in graphene, while the reflection drops to nearly zero for a broad range of angles of incidence. The frequency of this resonant mode can be adjusted by changing the Fermi energy in graphene via electrostatic gating and therefore it can be used for electrically controlled reflection and transmission of THz radiation. Another remarkable finding is that the composite layer supports s-polarised surface polaritons linked to Drude plasmons in graphene. |
|---|---|
| Main Authors: | Souto, André |
| Other Authors: | Pereira, Rui M. S.; Santos, Jaime E.; Peres, N. M. R.; Vasilevskiy, Mikhail |
| Subject: | Graphene Nanoparticles Plasmonics Surface plasmon-polaritons Coupled dipole equations |
| Year: | 2017 |
| Country: | Portugal |
| Document type: | conference paper |
| Access type: | restricted access |
| Associated institution: | Universidade do Minho |
| Language: | English |
| Origin: | RepositóriUM - Universidade do Minho |
| _version_ | 1867438608954163200 |
|---|---|
| author | Souto, André |
| author2 | Pereira, Rui M. S. Santos, Jaime E. Peres, N. M. R. Vasilevskiy, Mikhail |
| author2_role | author author author author |
| author_facet | Souto, André Pereira, Rui M. S. Santos, Jaime E. Peres, N. M. R. Vasilevskiy, Mikhail |
| author_role | author |
| contributor_name_str_mv | RepositóriUM - Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Souto, André\"},{\"Person.name\":\"Pereira, Rui M. S.\"},{\"Person.name\":\"Santos, Jaime E.\"},{\"Person.name\":\"Peres, N. M. R.\"},{\"Person.name\":\"Vasilevskiy, Mikhail\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RepositóriUM - Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Souto, André Pereira, Rui M. S. Santos, Jaime E. Peres, N. M. R. Vasilevskiy, Mikhail |
| datacite.date.Accepted.fl_str_mv | 2017-08-22T00:00:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | Graphene Nanoparticles Plasmonics Surface plasmon-polaritons Coupled dipole equations |
| datacite.titles.title.fl_str_mv | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene |
| dc.contributor.none.fl_str_mv | RepositóriUM - Universidade do Minho |
| dc.creator.none.fl_str_mv | Souto, André Pereira, Rui M. S. Santos, Jaime E. Peres, N. M. R. Vasilevskiy, Mikhail |
| dc.date.Accepted.fl_str_mv | 2017-08-22T00:00:00Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/47653 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Society of Photo-optical Instrumentation Engineers (SPIE) |
| dc.rights.cclincense.fl_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.rights.rights.copyright.fl_str_mv | restrictedAccess |
| dc.subject.none.fl_str_mv | Graphene Nanoparticles Plasmonics Surface plasmon-polaritons Coupled dipole equations |
| dc.title.fl_str_mv | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_5794 |
| description | We theoretically predict several plasmonic effects that arise when a monolayer of small polarisable particles is deposited on graphene, related to surface plasmon-polaritons (SPPs) supported by the latter in the terahertz (THz) spectral range. The electromagnetic coupling between graphene SPPs and dipole moments of the nanoparticles (NPs) gives rise to optical properties that are not present in the individual components of this system. The polarisation characteristics of the particles are modified, namely: (i) individual NP’s polarisability is renormalized and (ii) their dipole-dipole interaction includes, beyond the usual ∝ ρ−3 term (ρ is the particleparticle distance), an indirect particle-particle coupling arises via polarisation charges induced on the graphenecovered interface by each particle – this indirect coupling oscillates with the interparticle distance. We derived coupled-dipole equations taking into account all these effects, allowing us to calculate an effective optical conductivity of the particles’ monolayer and study the optical properties of the composite (G+NPs) system. One of the G+NPs system’s unique features is a collective resonant mode, causing a considerable enhancement of the THz radiation absorption in graphene, while the reflection drops to nearly zero for a broad range of angles of incidence. The frequency of this resonant mode can be adjusted by changing the Fermi energy in graphene via electrostatic gating and therefore it can be used for electrically controlled reflection and transmission of THz radiation. Another remarkable finding is that the composite layer supports s-polarised surface polaritons linked to Drude plasmons in graphene. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | conferencePaper |
| fulltext.url.fl_str_mv | https://repositorium.uminho.pt/bitstreams/46746551-95fe-41a1-9410-9d4ffb052d22/download |
| id | rum_7817b56074fe8ac76eac4596b830dca2 |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/47653 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/47653 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Souto, André Pereira, Rui M. S. Santos, Jaime E. Peres, N. M. R. Vasilevskiy, Mikhail |
| publishDate | 2017 |
| publisher.none.fl_str_mv | Society of Photo-optical Instrumentation Engineers (SPIE) |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engSociety of Photo-optical Instrumentation Engineers (SPIE)porWe theoretically predict several plasmonic effects that arise when a monolayer of small polarisable particles is deposited on graphene, related to surface plasmon-polaritons (SPPs) supported by the latter in the terahertz (THz) spectral range. The electromagnetic coupling between graphene SPPs and dipole moments of the nanoparticles (NPs) gives rise to optical properties that are not present in the individual components of this system. The polarisation characteristics of the particles are modified, namely: (i) individual NP’s polarisability is renormalized and (ii) their dipole-dipole interaction includes, beyond the usual ∝ ρ−3 term (ρ is the particleparticle distance), an indirect particle-particle coupling arises via polarisation charges induced on the graphenecovered interface by each particle – this indirect coupling oscillates with the interparticle distance. We derived coupled-dipole equations taking into account all these effects, allowing us to calculate an effective optical conductivity of the particles’ monolayer and study the optical properties of the composite (G+NPs) system. One of the G+NPs system’s unique features is a collective resonant mode, causing a considerable enhancement of the THz radiation absorption in graphene, while the reflection drops to nearly zero for a broad range of angles of incidence. The frequency of this resonant mode can be adjusted by changing the Fermi energy in graphene via electrostatic gating and therefore it can be used for electrically controlled reflection and transmission of THz radiation. Another remarkable finding is that the composite layer supports s-polarised surface polaritons linked to Drude plasmons in graphene.application/pdfporElectromagnetic properties of a monolayer of polarisable particles deposited on grapheneSouto, AndréPereira, Rui M. S.Santos, Jaime E.Peres, N. M. R.Vasilevskiy, MikhailHostingInstitutionOrganizationalRepositóriUM - Universidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptCITATIONAndré Souto, Rui M. S. Pereira, Jaime E. Santos, Nuno Peres, Mikhail Vasilevskiy, "Electromagnetic properties of a monolayer of polarisable particles deposited on graphene", Proc. SPIE 10453, Third International Conference on Applications of Optics and Photonics, 104530V (22 August 2017); doi: 10.1117/12.2271960; http://dx.doi.org/10.1117/12.2271960ISBNIsPartOf9781510613836ISSNIsPartOf0277-786XDOIIsPartOf10.1117/12.22719602017-08-222017-08-22T00:00:00ZHandlehttps://hdl.handle.net/1822/47653http://purl.org/coar/access_right/c_16ecrestricted accessGrapheneNanoparticlesPlasmonicsSurface plasmon-polaritonsCoupled dipole equations400999 bytesother research producthttp://purl.org/coar/resource_type/c_5794conference paper2017-08-22http://creativecommons.org/licenses/by/4.0/restrictedAccesshttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://repositorium.uminho.pt/bitstreams/46746551-95fe-41a1-9410-9d4ffb052d22/download |
| spellingShingle | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene Souto, André Graphene Nanoparticles Plasmonics Surface plasmon-polaritons Coupled dipole equations |
| status | SINGLETON |
| subject.fl_str_mv | Graphene Nanoparticles Plasmonics Surface plasmon-polaritons Coupled dipole equations |
| title | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene |
| title_full | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene |
| title_fullStr | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene |
| title_full_unstemmed | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene |
| title_short | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene |
| title_sort | Electromagnetic properties of a monolayer of polarisable particles deposited on graphene |
| topic | Graphene Nanoparticles Plasmonics Surface plasmon-polaritons Coupled dipole equations |
| topic_facet | Graphene Nanoparticles Plasmonics Surface plasmon-polaritons Coupled dipole equations |
| url | https://hdl.handle.net/1822/47653 |
| visible | 1 |