Femtosecond-laser-writing in various glasses

Ehrt, D.; Kittel, Thomas; Will, Matthias; Nolte, Stefan; Tünnermann, Andreas

doi:10.1016/j.jnoncrysol.2004.08.039

Cited by 44 publications

(17 citation statements)

References 9 publications

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“…It is attributed in this particular case to a change of connectivity between fluorine and phosphate groups. 18 High repetition rate laser can favor ionic migration like in potassium-lanthanum-phosphate glass, where positive index variation was observed following the fluctuations of (K, La) local concentration. In the present investigation, the generation of hole/ electron pairs leads to the formation of Ag 2þ and Ag 0 species mainly.…”

Section: Surface Engineeringmentioning

confidence: 99%

Femtosecond laser structuring of silver-containing glass: Silver redistribution, selective etching, and surface topology engineering

Desmoulin

Petit

Canioni

et al. 2015

Journal of Applied Physics

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International audienceFemtoseconddirect laser writing in silver-containing phosphate glasses allows for the three-dimensional (3D) implementation of complex photonic structures. Sample translation along or perpendicular to the direction of the beam propagation has been performed, which led to the permanent formation of fluorescent structures, either corresponding to a tubular shape or to two parallel planes at the vicinity of the interaction voxel, respectively. These optical features are related to significant modifications of the local material chemistry. Indeed, silver depletion areas with a diameter below 200 nm were evidenced at the center of the photo-produced structures while photo-produced luminescence properties are attributed to the formation of silver clusters around the multiphoton interaction voxel. The laser-triggered oxidation-reduction processes and the associated photo-induced silver redistribution are proposed to be at the origin of the observed original 3D luminescent structures. Thanks to such material structuring,surface engineering has been also demonstrated. Selective surface chemical etching of the glass has been obtained subsequently to laser writing at the location of the photo-produced structures, revealing features with nanometric depth profiles and radial dimensions strongly related to the spatial distributions of the silver clusters

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Section: Surface Engineeringmentioning

confidence: 99%

Femtosecond laser structuring of silver-containing glass: Silver redistribution, selective etching, and surface topology engineering

Desmoulin

Petit

Canioni

et al. 2015

Journal of Applied Physics

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“…Negative refractive index changes were also noticed in modified regions of fluoride phosphate glasses in the athermal regime. 51 The properties of these glasses are mainly determined by the ratio of fluoride to phosphate groups in the micro-glass structure. Interestingly, the bandgap decreases, and the absolute value of the index change increases drastically with increasing phosphate content.…”

Section: Phosphate Glassesmentioning

confidence: 99%

Ultrafast Laser Inscription in Soft Glasses: A Comparative Study of Athermal and Thermal Processing Regimes for Guided Wave Optics

Gross

Ams

Palmer

et al. 2012

Int J of Appl Glass Sci

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The combination of ultrafast laser inscription and engineered soft glasses is enabling a new class of photonic devices offering long wavelength transparency, high nonlinearity, and optical gain. However, this field of research also possesses its own unique set of fabrication challenges, which range from the predictable, such as self‐focusing effects, material stress, and damage to the unexpected, such as photo‐induced index changes of different sign. In this article, we review many of the fabrication challenges surrounding ultrafast laser‐written soft‐glass photonics and highlight these by comparing and contrasting laser processing of common soft glasses in both the athermal and thermal writing regimes.

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“…The understanding of the origin of optical nonlinearities in glasses and glass ceramics stimulated by ultra-short laser pulses has gained momentum in the recent years; such studies in fact help in examining the suitability of the materials for potential applications like three-dimensional photonic devices for integrated optics and other nonlinear optical devices (such as ultrafast optical switches, power limiters, broad band optical amplifiers) [1,2]. The conventional methods, like ion-exchange, diffusion into a transparent substrate or lithographic methods that are being used for inducing nonlinear optical effects are generally limited to the fabrication of planar or low-dimensional structures.…”

Section: Introductionmentioning

confidence: 99%