F.A. Bomfim

Universidade de São Paulo

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L.R.P. Kassab

Faculdade de Tecnologia de São Paulo

J.R. Martinelli

University of Groningen

Davinson M. da Silva

São Paulo State Technological College

M.I. Alayo

Universidade de São Paulo

T.A.A. de Assumpção

Universidade de São Paulo

Cid B. de Araújo

Universidade Federal de Pernambuco

Jonas Jakutis Neto

Instituto de Estudos Avançados da Universidade de São Paulo

Niklaus Ursus Wetter

National Nuclear Energy Commission

Emerson G. Melo

Universidade de São Paulo

Daniel O. Carvalho

University of Lisbon

Cooperative Institutions

Universidade de São Paulo

São Paulo State Technological College

Faculdade de Tecnologia de São Paulo

Universidade Estadual Paulista (Unesp)

Universidade Politecnica

National Nuclear Energy Commission

Association of the Technological Integrated Systems Laboratory

Instituto de Pesquisas Energéticas e Nucleares

Universidade Estadual de Campinas (UNICAMP)

Nuclear Engineering Institute

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Effect of the ytterbium concentration on the upconversion luminescence of Yb3+/Er3+ co-doped PbO–GeO2–Ga2O3 glasses

Journal of Non-Crystalline Solids (2008)

F.A. Bomfim J.R. Martinelli L.R.P. Kassab Niklaus Ursus Wetter Jonas Jakutis Neto

Photon Upconversion

Ytterbium

Emission intensity

Laser diode

10.1016/j.jnoncrysol.2008.04.033

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Citations (44)

Infrared-to-visible upconversion in Yb3+/Er3+ co-doped PbO–GeO2 glass with silver nanoparticles

Journal of Non-Crystalline Solids (2010)

F.A. Bomfim J.R. Martinelli L.R.P. Kassab T.A.A. de Assumpção Cid B. de Araújo

Enhanced frequency upconversion (UC) emission was studied in Yb3+/Er3+ co-doped PbO–GeO2 glass containing silver nanoparticles (NPs). Optical excitation was achieved with a laser operating at 980 nm in resonance with the Yb3+ transition 4F5/2 → 4F7/2. The intensity of the whole UC spectrum from 400 to 700 nm was intensified due to the influence of silver NPs. The green and red emissions were enhanced by more than 300%. Emission bands centered at 408 nm and 480 nm were also detected corresponding to the 2H9/2 → 4I15/2 and 4F7/2 → 4I15/2 transitions of Er3+ ion. An intensity enhancement of ≈ 150% due to the NPs was measured. For the first time the influence of silver NPs on the blue emission of Yb3+/Er3+ co-doped PbO–GeO2 glass is reported. The large enhancement in the whole UC spectrum is due to the increased local field in the Er3+ ions locations and the proximity between the luminescence wavelengths and the NPs surface plasmon resonance.

Photon Upconversion

Silver nanoparticle

Emission intensity

10.1016/j.jnoncrysol.2010.03.028

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Citations (33)

Production of Yb<sup>3+</sup>/Er<sup>3+</sup> codoped PbO-GeO<inf>2</inf> pedestal type waveguides for photonic applications

F.A. Bomfim Davinson M. da Silva L.R.P. Kassab M.I. Alayo

We report experimental results on pedestal waveguides produced with Yb ³⁺ /Er ³⁺ codoped PbO-GeO ₂ thin films deposited by RF Sputtering for photonic applications. Losses around 2.5 dB/cm and 1.5 dB/cm were obtained at 632 and 1068 nm, respectively, for waveguides in the 20-100 μm width range. Internal gain of 6.0 dB and 4.0 dB, at 1530 nm, under 980 nm excitation, were measured for waveguides width of 80 and 14 μm, respectively. The present results show the possibility of using Yb ³⁺ /Er ³⁺ codoped PbO-GeO ₂ pedestal waveguide for optical amplifiers.

10.1109/sbmicro.2015.7298112

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Energy transfer and frequency upconversion in Yb3+–Er3+-doped PbO-GeO2 glass containing silver nanoparticles

Applied Physics B (2008)

L.R.P. Kassab F.A. Bomfim J.R. Martinelli Niklaus Ursus Wetter Jonas Jakutis Neto

Photon Upconversion

Ytterbium

Silver nanoparticle

10.1007/s00340-008-3249-2

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Citations (136)