Femtosecond laser fabrication of waveguides in Rhodamine B-doped GPTS/TEOS-derived organic/silica monolithic xerogel

Ferreira, P. H. D.; Otuka, Adriano J. G.; Barbano, E. C.; Manoel, D. S.; Vicente, F.; Vollet, Dimas R.; Donatti, D. A.; Misoguti, Lino; Mendonça, Cleber Renato

doi:10.1016/j.optmat.2015.05.047

Cited by 12 publications

(8 citation statements)

References 42 publications

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“…They combine the advantages of organic polymers, like toughness and flexibility, with those of inorganic components such as enhanced mechanical properties, chemical resistance, optical quality, etc. Organic/ Silica hybrid materials prepared by sol-gel process are the most studied and important class of hybrids due to their high applicability in several fields such as optics, photonics, energy, and medicine [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence tuning and energy transfer process from Tb3+ to Eu3+ in GPTMS/TEOS–derived organic/silica hybrid films

Vicente

Freddi

Otuka

et al. 2018

Journal of Luminescence

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In this work the photoluminescence study and energy transfer from Tb 3+ to Eu 3+-β-diketonate complexes incorporated into organic/Silica hybrid films derived from 3-glycidoxypropyltrimethoxysilane (GPTMS) and tetraethylorthosilicate (TEOS) alkoxysilanes were investigated. Highly homogeneous and transparent films of Ln 3+-doped GPTMS/TEOS-derived organic/silica hybrids were obtained from the organic/silica sols prepared by sol-gel. Tb 3+ :Eu 3+-doped GPTMS/TEOS-derived films showed very intense luminescence when excited with UV light. Films co-doped with Tb 3+ concentration fixed at 40.0×10 18 ions/cm 3 and Eu 3+ concentrations of 0, 0.03, 0.05, 0.1, 0.3, 0.5, 1.0, 1.5, and 2.0×10 18 ions/cm 3 were studied. The films presented characteristic transitions 5 D 4-7 F 6-3 of Tb 3+ ions and 5 D 0-7 F 0-4 of Eu 3+ ions measured on the visible spectrum region. Energy transfer from Terbium to Europium was studied through emission decay time measurements of 5 D 4-7 F 5 transition of Tb 3+ (547 nm) which showed an accentuated decrease (from 1329 to 55 µs) due to the co-doping with Eu 3+ ions concentrations varied from 0.03 to 1.5×10 18 ions/cm 3. Energy transfer rate (W ET) of 17.4×10 3 s −1 and relative energy transfer efficiency (η T) of 96% were observed for films samples co-doped with 40×10 18 ions/cm 3 of Tb 3+ and 1.5×10 18 ions/cm 3 of Eu 3+. Due to the variation in W ET and η T from Tb 3+ to Eu 3+ , the intensity ratios of Tb 3+ band at 547 nm (5 D 4-7 F 5) and Eu 3+ band at 617 nm (5 D 0-7 F 2) vary remarkably making the co-doped film samples exhibit different luminescence colors varying from green to orange and red which can be tuned by the Tb 3+ /Eu 3+ ratio incorporated into the samples.

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Section: Introductionmentioning

confidence: 99%

Photoluminescence tuning and energy transfer process from Tb3+ to Eu3+ in GPTMS/TEOS–derived organic/silica hybrid films

Vicente

Freddi

Otuka

et al. 2018

Journal of Luminescence

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“…However, it has been reported that the TEOS/GPTMSderived hybrids prepared with a TEOS/GPTMS molar ratio equal to 1 present very enhanced mechanical and optical properties which can be appropriated for several applications. For instance, it was shown that luminescent quantum dots embedded in a 1:1 molar TEOS/GPTMS-derived organic/ silica matrix presented enhanced emission quantum efficiency (Alencar et al, 2014), and monolithic xerogels prepared with 1:1 molar TEOS/GPTMS-derived organic/silica hybrids doped with rhodamine B have been used for femtosecond laser fabrication of waveguides (Ferreira et al, 2015). In the present work, the structure and the growth kinetics of TEOS/GPTMSderived hybrids prepared with a TEOS/GPTMS molar ratio equal to 1 were studied by small-angle X-ray scattering (SAXS) at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Rod-like particles growing in sol–gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane

et al. 2017

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The growth kinetics and the structure of organic/silica hybrids prepared from acid hydrolysis of 1:1 molar mixtures of 3‐glycidoxypropyltrimethoxysilane and tetraethoxysilane were studied by small‐angle X‐ray scattering (SAXS) at 315, 325 and 335 K. The evolution of the SAXS intensity is compatible with the growth of silica‐rich domains by aggregation from a fixed number of primary particles. Two distinct growth regimes could be identified by analyzing the relation I(0) ∝ RgD between the intensity extrapolated to zero I(0), the radius of gyration Rg of the aggregates and the exponent D, which gives information on the geometry and the mechanism of growth of the aggregates. An initial period was attributed to the growth of rod‐like particles with approximately the same radius and variable length. At more advanced degrees of aggregation the process was controlled by the growth of larger aggregates with higher‐order dimensionality. A narrow distribution of cylinder lengths given by the Schulz function fitted the experimental SAXS data well during the most part of the initial regime of cylindrical particle growth. These particles were later found as rod‐like subunits of the larger aggregates grown at more advanced degrees of aggregation. Some condensation possibilities yielding the formation of structures compatible with those inferred from the present study are discussed.

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“…Dispositivos fabricados via microestruturação a laser podem ser aplicados em diferentes áreas tecnológicas. No campo da fotônica, essa técnica possibilita, por exemplo, a fabricação de guias de onda [82][83][84] de maneira fácil, rápida e eficiente. Na Fig.…”

Section: Microestruturação Direta a Laserunclassified

“…Na Fig. 2.13 é apresentado um exemplo de guias de onda fabricados pela técnica de microestruturação direta a laser 84 . A amostra utilizada para a produção desses guias é um material híbrido orgânicoinorgânico, dopado com Rodamina B (GPTS-TEOS-RdB), e sintetizado a partir da técnica sol-gel 85 .…”

Section: Microestruturação Direta a Laserunclassified

“…A amostra utilizada para a produção desses guias é um material híbrido orgânicoinorgânico, dopado com Rodamina B (GPTS-TEOS-RdB), e sintetizado a partir da técnica sol-gel 85 . Além disso, os guias são fabricados a aproximadamente 120 µm da superfície 84 O fotoiniciador Lucirin TPO-L desencadeia a polimerização por radicais livres e o mecanismo de formação dos radicais é dado por reação unimolecular (fotoiniciador Tipo I).…”

Section: Microestruturação Direta a Laserunclassified

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Estruturas poliméricas com nanotubos de carbono: processamento a laser, caracterização e aplicações

Otuka¹

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Aos meus pais, Terezinha Aparecida e Osvaldo Otuka, que são a minha base e fonte de inspiração. À minha irmã, Danielli, sempre disposta a me ajudar. Aos meus avós, Toninho e Dona Cida, e também, ao meu querido "Tio João". Sem vocês, nada disso teria acontecido... AGRADECIMENTOS Em especial, agradeço ao meu orientador Prof. Dr. Cleber Renato Mendonça, um profissional extremamente competente e dedicado, e por quem tenho uma grande admiração. Agradeço principalmente por seus valiosos ensinamentos, que não se limitaram apenas a minha formação profissional. Obrigado pela confiança, paciência e inúmeras oportunidades.

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Femtosecond laser fabrication of waveguides in Rhodamine B-doped GPTS/TEOS-derived organic/silica monolithic xerogel

Cited by 12 publications

References 42 publications

Photoluminescence tuning and energy transfer process from Tb3+ to Eu3+ in GPTMS/TEOS–derived organic/silica hybrid films

Photoluminescence tuning and energy transfer process from Tb3+ to Eu3+ in GPTMS/TEOS–derived organic/silica hybrid films

Rod-like particles growing in sol–gel processing of 1:1 molar mixtures of 3-glycidoxypropyltrimethoxysilane and tetraethoxysilane

Estruturas poliméricas com nanotubos de carbono: processamento a laser, caracterização e aplicações

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