Single bead near-infrared random laser based on silica-gel infiltrated with Rhodamine 640
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
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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Repositório Institucional da UNESP |
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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:29462024-08-05T14:04:16.662006Repositório 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 |
|
_version_ |
1808128312104452096 |