Inorganic nanoparticles in organic-inorganic hybrid hosts for planar waveguides

Gonçalves, Rogéria Rocha; Carturan, G.; Scarpari, Sérgio L.; Oliveira, Daniela Cabral de; Bueno, Luciano A.; Ribeiro, Sidney J. L.; Messaddeq, Younès; Ferrari, M.; Montagna, M.; Rainho, José P.; Carlos, Luı́s D.

doi:10.1117/12.456538

Cited by 3 publications

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“…NIR-emitting lanthanide compounds have been reviewed recently, [15] and the drawback of important nonradiative decays in organic media, characteristic for Ln 3þ excited states, can be cleverly solved by tuning the nature of the Ln 3þ chemical surroundings through nanotechnology ''bottomup'' principles. Er 3þ emission at 1.55 mm has been indeed observed in some examples of organic-inorganic hybrids, as shown hereabove, [187,199] and even channel waveguides with 0.5 dB of gain observed over 7 mm with 980 nm pumping were prepared by Etienne et al [208] However, the quantum efficiency is still very low, and theoretical approaches to the problem suggest that a minimum distance of $20 Å should exist between Er 3þ and emission quenchers, such as C-H or O-H oscillators, in order to decrease nonradiative decays. [209] Important improvements have been achieved, for example, in terms of gain measurements in Er 3þ /Yb 3þ -Y 2 O 3 nanoparticles incorporated into PMMA.…”

Section: Summary Applications and Outlookmentioning

confidence: 68%

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Lanthanide‐Containing Light‐Emitting Organic–Inorganic Hybrids: A Bet on the Future

et al. 2009

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Interest in lanthanide-containing organic-inorganic hybrids has grown considerably during the last decade, with the concomitant fabrication of materials with tunable attributes offering modulated properties. The potential of these materials relies on exploiting the synergy between the intrinsic characteristics of sol-gel derived hosts (highly controlled purity, versatile shaping and patterning, excellent optical quality, easy control of the refractive index, photosensitivity, encapsulation of large amounts of isolated emitting centers protected by the host) and the luminescence features of trivalent lanthanide ions (high luminescence quantum yield, narrow bandwidth, long-lived emission, large Stokes shifts, ligand-dependent luminescence sensitization). Promising applications may be envisaged, such as light-emitting devices, active waveguides in the visible and near-IR spectral regions, active coatings, and bio-medical actuators and sensors, opening up exciting directions in materials science and related technologies with significant implications in the integration, miniaturization, and multifunctionalization of devices. This review provides an overview of the latest advances in Ln(3+)-containing siloxane-based hybrids, with emphasis on the different possible synthetic strategies, photoluminescence features, empirical determination.

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Section: Summary Applications and Outlookmentioning

confidence: 68%

“…The same broad band was also observed for an Er 3þ -based organic-inorganic hybrid composed of epoxy-modified siloxane obtained from 3-glycidoxypropyltrimethoxysilane (GPTS or GLYMO) loaded with zirconia nanoparticles. [199] …”

Section: Absorption and Light Emission 41 Nir Emittersmentioning

confidence: 97%