Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640

Detalhes bibliográficos
Autor(a) principal: Moura, André L.
Data de Publicação: 2018
Outros Autores: Barbosa-Silva, Renato, Dominguez, Christian T., Pecoraro, Édison [UNESP], Gomes, Anderson S. L., De Araújo, Cid B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1063/1.5024934
http://hdl.handle.net/11449/176177
Resumo: Photoluminescence properties of single bead silica-gel (SG) embedded with a laser-dye were studied aiming at the operation of near-infrared (NIR) Random Lasers (RLs). The operation of RLs in the NIR spectral region is especially important for biological applications since the optical radiation has deep tissue penetration with negligible damage. Since laser-dyes operating in the NIR have poor stability and are poor emitters, ethanol solutions of Rhodamine 640 (Rh640) infiltrated in SG beads were used. The Rh640 concentrations in ethanol varied from 10-5 to 10-2 M and the excitation at 532 nm was made by using a 7 ns pulsed laser. The proof-of-principle RL scheme herein presented was adopted in order to protect the dye-molecules from the environment and to favor formation of aggregates. The RL emission from ≈650 nm to 720 nm, beyond the typical Rh640 monomer and dimer wavelengths emissions range, was attributed to the trade-off between reabsorption and reemission processes along the light pathways inside the SG bead and the contribution of Rh640 aggregates.
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spelling Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640Photoluminescence properties of single bead silica-gel (SG) embedded with a laser-dye were studied aiming at the operation of near-infrared (NIR) Random Lasers (RLs). The operation of RLs in the NIR spectral region is especially important for biological applications since the optical radiation has deep tissue penetration with negligible damage. Since laser-dyes operating in the NIR have poor stability and are poor emitters, ethanol solutions of Rhodamine 640 (Rh640) infiltrated in SG beads were used. The Rh640 concentrations in ethanol varied from 10-5 to 10-2 M and the excitation at 532 nm was made by using a 7 ns pulsed laser. The proof-of-principle RL scheme herein presented was adopted in order to protect the dye-molecules from the environment and to favor formation of aggregates. The RL emission from ≈650 nm to 720 nm, beyond the typical Rh640 monomer and dimer wavelengths emissions range, was attributed to the trade-off between reabsorption and reemission processes along the light pathways inside the SG bead and the contribution of Rh640 aggregates.Grupo de Física da Matéria Condensada Núcleo de Ciências Exatas-NCEx Campus Arapiraca Universidade Federal de AlagoasDepartamento de Física Universidade Federal de PernambucoLaboratório de Óptica Biomédica e Imagem Universidade Federal de PernambucoGeneral and Inorganic Chemistry Department UNESP São Paulo State University Institute of ChemistryGeneral and Inorganic Chemistry Department UNESP São Paulo State University Institute of ChemistryUniversidade Federal de AlagoasUniversidade Federal de Pernambuco (UFPE)Universidade Estadual Paulista (Unesp)Moura, André L.Barbosa-Silva, RenatoDominguez, Christian T.Pecoraro, Édison [UNESP]Gomes, Anderson S. L.De Araújo, Cid B.2018-12-11T17:19:29Z2018-12-11T17:19:29Z2018-04-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1063/1.5024934Journal of Applied Physics, v. 123, n. 13, 2018.1089-75500021-8979http://hdl.handle.net/11449/17617710.1063/1.50249342-s2.0-850453114742-s2.0-85045311474.pdf5282584912774370000-0002-5049-8797Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Applied Physics0,7390,739info:eu-repo/semantics/openAccess2023-10-05T06:04:39Zoai:repositorio.unesp.br:11449/176177Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-05T06:04:39Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
title Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
spellingShingle Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
Moura, André L.
title_short Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
title_full Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
title_fullStr Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
title_full_unstemmed Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
title_sort Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
author Moura, André L.
author_facet Moura, André L.
Barbosa-Silva, Renato
Dominguez, Christian T.
Pecoraro, Édison [UNESP]
Gomes, Anderson S. L.
De Araújo, Cid B.
author_role author
author2 Barbosa-Silva, Renato
Dominguez, Christian T.
Pecoraro, Édison [UNESP]
Gomes, Anderson S. L.
De Araújo, Cid B.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Federal de Alagoas
Universidade Federal de Pernambuco (UFPE)
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Moura, André L.
Barbosa-Silva, Renato
Dominguez, Christian T.
Pecoraro, Édison [UNESP]
Gomes, Anderson S. L.
De Araújo, Cid B.
description Photoluminescence properties of single bead silica-gel (SG) embedded with a laser-dye were studied aiming at the operation of near-infrared (NIR) Random Lasers (RLs). The operation of RLs in the NIR spectral region is especially important for biological applications since the optical radiation has deep tissue penetration with negligible damage. Since laser-dyes operating in the NIR have poor stability and are poor emitters, ethanol solutions of Rhodamine 640 (Rh640) infiltrated in SG beads were used. The Rh640 concentrations in ethanol varied from 10-5 to 10-2 M and the excitation at 532 nm was made by using a 7 ns pulsed laser. The proof-of-principle RL scheme herein presented was adopted in order to protect the dye-molecules from the environment and to favor formation of aggregates. The RL emission from ≈650 nm to 720 nm, beyond the typical Rh640 monomer and dimer wavelengths emissions range, was attributed to the trade-off between reabsorption and reemission processes along the light pathways inside the SG bead and the contribution of Rh640 aggregates.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-11T17:19:29Z
2018-12-11T17:19:29Z
2018-04-07
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1063/1.5024934
Journal of Applied Physics, v. 123, n. 13, 2018.
1089-7550
0021-8979
http://hdl.handle.net/11449/176177
10.1063/1.5024934
2-s2.0-85045311474
2-s2.0-85045311474.pdf
528258491277437
0000-0002-5049-8797
url http://dx.doi.org/10.1063/1.5024934
http://hdl.handle.net/11449/176177
identifier_str_mv Journal of Applied Physics, v. 123, n. 13, 2018.
1089-7550
0021-8979
10.1063/1.5024934
2-s2.0-85045311474
2-s2.0-85045311474.pdf
528258491277437
0000-0002-5049-8797
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Applied Physics
0,739
0,739
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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