Gallium polymorphs: phase-dependent plasmonics
Interest in gallium (Ga) is growing rapidly, thanks in part to its wide spectral tunability and its intriguing temperature-dependent polymorphism. In order to exploit and control phase-change plasmonics in the liquid and solid phases of Ga, an accurate understanding of the dielectric functions for e...
| Autores: | , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Cantabria (UC) |
| Repositorio: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unican.es:10902/33211 |
| Acceso en línea: | https://hdl.handle.net/10902/33211 |
| Access Level: | acceso abierto |
| Palabra clave: | Gallium Plasmonics Nanoparticle Phase change Polymorphism Spectroscopic ellipsometry Dielectric function |
| id |
ES_c48b970cd2bae2e8505c59ad3ba05cb0 |
|---|---|
| oai_identifier_str |
oai:repositorio.unican.es:10902/33211 |
| network_acronym_str |
ES |
| network_name_str |
España |
| repository_id_str |
|
| spelling |
Gallium polymorphs: phase-dependent plasmonicsGutiérrez Vela, Yael|||0000-0002-1604-7968Losurdo, MaríaGarcía Fernández, Pablo (físico)|||0000-0002-4901-0811Sainz de la Maza Kaufmann, MartaGonzález Fernández, Francisco|||0000-0002-2944-4903Brown, April S.Everitt, Henry O.Junquera Quintana, Francisco Javier|||0000-0002-9957-8982Moreno Gracia, Fernando|||0000-0003-3171-7285GalliumPlasmonicsNanoparticlePhase changePolymorphismSpectroscopic ellipsometryDielectric functionInterest in gallium (Ga) is growing rapidly, thanks in part to its wide spectral tunability and its intriguing temperature-dependent polymorphism. In order to exploit and control phase-change plasmonics in the liquid and solid phases of Ga, an accurate understanding of the dielectric functions for each Ga phase is needed. We present a comprehensive analysis of the interdependence of the crystal structure, band structure, and dielectric function of the several Ga phases (liquid, α, β, γ, δ), showing that the selective presence of flat bands in the vecinity of the Fermi energy is crucial to understand the metallicity of each phase. The dielectric function obtained through first principles calculations is compared with experimental measurements obtained by spectroscopic ellipsometry. Cooling liquid Ga always produces a mixture of phases, and we demonstrate how the volume fraction of each phase may be deduced from these pure phase dielectric functions and an analysis of the measured spectra using a Bruggeman effective medium approximation. Figures of merit are presented, and applications of Ga polymorphism are discussed for propagating and localized surface plasmon resonances in Ga thin films and nanostructures, respectively. This research can have important implications on the phase change control for plasmonics/photonic applications with gallium.M.L. acknowledges the support of the European Commission under the H2020 grant TWINFUSYON (GA692034). Y.G. and F.M. acknowledges the support by the Army Research Laboratory under Cooperative Agreement Number W911NF-17-2-0023 and by SODERCAN (Sociedad para el Desarrollo de Cantabria) through the Research Vicerrectorate of the University of Cantabria. Y.G. thanks the University of Cantabria for her FPU grant. P.G.-F. and J.J. acknowledge financial support from the Spanish Ministry of Economy and Competitiveness through grant number FIS2015-64886-C5-2-P, and P.G.-F. acknowledges support from Ramón y Cajal grant no. RyC-2013-12515.John Wiley and Sons Inc.Universidad de Cantabria20192019-07-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttps://hdl.handle.net/10902/33211Advanced Optical Materials, 2019, 7(13), 1900307reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/332112026-06-02T12:39:31Z |
| dc.title.none.fl_str_mv |
Gallium polymorphs: phase-dependent plasmonics |
| title |
Gallium polymorphs: phase-dependent plasmonics |
| spellingShingle |
Gallium polymorphs: phase-dependent plasmonics Gutiérrez Vela, Yael|||0000-0002-1604-7968 Gallium Plasmonics Nanoparticle Phase change Polymorphism Spectroscopic ellipsometry Dielectric function |
| title_short |
Gallium polymorphs: phase-dependent plasmonics |
| title_full |
Gallium polymorphs: phase-dependent plasmonics |
| title_fullStr |
Gallium polymorphs: phase-dependent plasmonics |
| title_full_unstemmed |
Gallium polymorphs: phase-dependent plasmonics |
| title_sort |
Gallium polymorphs: phase-dependent plasmonics |
| dc.creator.none.fl_str_mv |
Gutiérrez Vela, Yael|||0000-0002-1604-7968 Losurdo, María García Fernández, Pablo (físico)|||0000-0002-4901-0811 Sainz de la Maza Kaufmann, Marta González Fernández, Francisco|||0000-0002-2944-4903 Brown, April S. Everitt, Henry O. Junquera Quintana, Francisco Javier|||0000-0002-9957-8982 Moreno Gracia, Fernando|||0000-0003-3171-7285 |
| author |
Gutiérrez Vela, Yael|||0000-0002-1604-7968 |
| author_facet |
Gutiérrez Vela, Yael|||0000-0002-1604-7968 Losurdo, María García Fernández, Pablo (físico)|||0000-0002-4901-0811 Sainz de la Maza Kaufmann, Marta González Fernández, Francisco|||0000-0002-2944-4903 Brown, April S. Everitt, Henry O. Junquera Quintana, Francisco Javier|||0000-0002-9957-8982 Moreno Gracia, Fernando|||0000-0003-3171-7285 |
| author_role |
author |
| author2 |
Losurdo, María García Fernández, Pablo (físico)|||0000-0002-4901-0811 Sainz de la Maza Kaufmann, Marta González Fernández, Francisco|||0000-0002-2944-4903 Brown, April S. Everitt, Henry O. Junquera Quintana, Francisco Javier|||0000-0002-9957-8982 Moreno Gracia, Fernando|||0000-0003-3171-7285 |
| author2_role |
author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Universidad de Cantabria |
| dc.subject.none.fl_str_mv |
Gallium Plasmonics Nanoparticle Phase change Polymorphism Spectroscopic ellipsometry Dielectric function |
| topic |
Gallium Plasmonics Nanoparticle Phase change Polymorphism Spectroscopic ellipsometry Dielectric function |
| description |
Interest in gallium (Ga) is growing rapidly, thanks in part to its wide spectral tunability and its intriguing temperature-dependent polymorphism. In order to exploit and control phase-change plasmonics in the liquid and solid phases of Ga, an accurate understanding of the dielectric functions for each Ga phase is needed. We present a comprehensive analysis of the interdependence of the crystal structure, band structure, and dielectric function of the several Ga phases (liquid, α, β, γ, δ), showing that the selective presence of flat bands in the vecinity of the Fermi energy is crucial to understand the metallicity of each phase. The dielectric function obtained through first principles calculations is compared with experimental measurements obtained by spectroscopic ellipsometry. Cooling liquid Ga always produces a mixture of phases, and we demonstrate how the volume fraction of each phase may be deduced from these pure phase dielectric functions and an analysis of the measured spectra using a Bruggeman effective medium approximation. Figures of merit are presented, and applications of Ga polymorphism are discussed for propagating and localized surface plasmon resonances in Ga thin films and nanostructures, respectively. This research can have important implications on the phase change control for plasmonics/photonic applications with gallium. |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2019 2019-07-01 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 NA http://purl.org/coar/version/c_be7fb7dd8ff6fe43 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/10902/33211 |
| url |
https://hdl.handle.net/10902/33211 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| eu_rights_str_mv |
openAccess |
| dc.publisher.none.fl_str_mv |
John Wiley and Sons Inc. |
| publisher.none.fl_str_mv |
John Wiley and Sons Inc. |
| dc.source.none.fl_str_mv |
Advanced Optical Materials, 2019, 7(13), 1900307 reponame:UCrea Repositorio Abierto de la Universidad de Cantabria instname:Universidad de Cantabria (UC) |
| instname_str |
Universidad de Cantabria (UC) |
| reponame_str |
UCrea Repositorio Abierto de la Universidad de Cantabria |
| collection |
UCrea Repositorio Abierto de la Universidad de Cantabria |
| repository.name.fl_str_mv |
|
| repository.mail.fl_str_mv |
|
| _version_ |
1869418890560274432 |
| score |
15.812429 |