Effects of UV photon irradiation on SiOx (0&lt;x&lt;2) structural properties

International audienceReactive magnetron co-sputtering of two confocal SiO 2 and Er 2 O 3 cathodes in argon–hydrogen plasma was used to deposit Er-doped Si-rich SiO 2 layers. The effects of the deposition conditions (such as RF power applied on each cathode and total plasma pressure) and annealing treatment (temperature and duration) on structural, compositional and photoluminescence (PL) properties of the layers were examined. It was found that a significant enhancement of both Er 3+ PL intensity and emission lifetime up to 9 ms have been reached through monitoring of the conditions of both deposition process and annealing treatment. The effective absorption cross section and the fraction of Er ions coupled to Si clusters were analyzed. It was shown an increase of the fraction of Er 3+ ions coupled to Si up to 11%

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“…Using the method described in Ref. [24], the Si excess estimated from FTIR data was found to decrease from 12 to 6 at% (Fig. 1b, curve 1).…”

Section: The Effect Of Total Plasma Pressurementioning

confidence: 98%

Long lifetime and efficient emission from Er3+ ions coupled to Si nanoclusters in Si-rich SiO2 layers

Khomenkova¹,

Gourbilleau²,

Cardin³

et al. 2009

Journal of Luminescence

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“…The Si excess induced by r H variation was estimated from the evolution of the FTIR spectra recorded at normal incidence (not shown) following the method described in Ref. [20]. Briefly summarized, this method is based on a linear relation between the shift on the TO 3 peak position for a sub-stoichiometric SiO x (1oxo2) matrix, with respect to that of SiO 2 , and the stoichiometric coefficient x.…”

Section: Effect Of Hydrogen Ratementioning

confidence: 99%

Towards an enhanced coupling between the Er ions and Si nanoclusters

Khomenkova

Gourbilleau

Cardin

et al. 2009

Physica E: Low-dimensional Systems and Nanostructures

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International audienceThe reactive magnetron co-sputtering of two confocal SiO 2 and Er 2 O 3 cathodes in argon–hydrogen plasma was used to deposit Er-doped Si-rich-SiO 2 layers. The effects of deposition conditions (such as hydrogen rate and substrate temperature) and annealing treatment (temperature and time) on the structural, compositional and photoluminescence (PL) properties of the layers were examined. An enhancement was observed of both Er 3+ PL emission and Er 3+ lifetime at 1.54 mm in comparison with their counterparts for the best samples reported so far. It was shown that a lifetime as high as 9 ms can be reached, with comparable PL intensities for resonant and non-resonant excitation lines. The effective cross-section and the fraction of Er ions coupled to Si clusters are analyzed

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“…SiO 2 is coated on the inner surface of our samples as an anti-scratch layer to enhance the mechanical properties [3,12,13]. Extensive investigations regarding anti-scratch coating materials, methods and effects of UV photons on them have been undertaken [14]- [16]. However, studying the influence of coherent illumination, particularly visible to infrared, on the optical properties and the morphology of coated PCs has remained a subject of interest.…”

Section: Introductionmentioning

confidence: 99%

Alteration of optical and morphological properties of polycarbonate illuminated by visible/IR laser beams

Ehssani¹,

Saghafi²,

Ghoranneviss³

et al. 2010

J. Eur. Opt. Soc.-Rapid Publ.

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In this paper we investigate the effects of visible to near infrared (NIR) laser illumination on the optical transmission (OT) and morphological (MC) alterations of thin, curved surfaces of polycarbonate (PC). The second harmonic of Nd:YAG laser (532 nm) and two diode lasers (665 and 980 nm) were used as illuminating sources. The morphological changes of the PC surfaces are determined using atomic force microscopy (AFM), demonstrating the appreciable changes caused by shorter wavelengths (higher energy). When analyzing the OT spectra of PC thin films, a measurable decrease in the OT of the PC samples which were illuminated by 532, 665 and 980 nm, in particular 532 nm, for energy densities greater than 25 J/cm 2 can be seen.

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Effects of UV photon irradiation on SiOx (0<x<2) structural properties

Cited by 17 publications

References 14 publications

Long lifetime and efficient emission from Er3+ ions coupled to Si nanoclusters in Si-rich SiO2 layers

Long lifetime and efficient emission from Er3+ ions coupled to Si nanoclusters in Si-rich SiO2 layers

Towards an enhanced coupling between the Er ions and Si nanoclusters

Alteration of optical and morphological properties of polycarbonate illuminated by visible/IR laser beams

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