Silver Clusters Embedded in Glass as a Perennial High Capacity Optical Recording Medium

Royon, Arnaud; Bourhis, Kevin; Bellec, Matthieu; Papon, Gautier; Bousquet, Bruno; Deshayes, Yannick; Cardinal, Thierry; Canioni, Lionel

doi:10.1002/adma.201002413

Cited by 217 publications

(189 citation statements)

References 32 publications

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“…6 Promising results have also been obtained for silver-containing phosphate glass through the formation of fluorescent Ag clusters under laser exposure. 7 As regards nanostructured glasses, the knowledge of the phase changes that NCs undergo in a solid matrix is important for evaluating possible strategies of nanocrystalin-glass data-storage and their real potential.…”

Section: Introductionmentioning

confidence: 99%

Diffusion-driven and size-dependent phase changes of gallium oxide nanocrystals in a glassy host

Golubev

Ignat’eva

Сигаев

et al. 2015

Phys. Chem. Chem. Phys.

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Phase transformations at the nanoscale represent a challenging field of research, mainly in the case of nanocrystals (NCs) in a solid host, with size-effects and interactions with the matrix. Here we report the study of the structural evolution of g-Ga 2 O 3 NCs in alkali-germanosilicate glass -a technologically relevant system for its light emission and UV-to-visible conversion -showing an evolution drastically different from the expected transformation of g-Ga 2 O 3 into b-Ga 2 O 3 . Differential scanning calorimetry registers an irreversible endothermic process at B1300 K, well above the exothermic peak of g-Ga 2 O 3 nano-crystallization (B960 K) and below the melting temperature (B1620 K). Transmission electron microscopy and X-ray diffraction data clarify that glass-embedded g-Ga 2 O 3 NCs transform into LiGa 5 O 8 via diffusion-driven kinetics of Li incorporation into NCs. At the endothermic peak, b-Ga 2 O 3 forms from LiGa 5 O 8 dissociation, following a nucleation-limited kinetics promoted by size-dependent order-disorder change between LiGa 5 O 8 polymorphs. As a result of the changes, modifications of UV-excited NC light emission are registered, with potential interest for applications.

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Section: Introductionmentioning

confidence: 99%

Diffusion-driven and size-dependent phase changes of gallium oxide nanocrystals in a glassy host

Golubev

Ignat’eva

Сигаев

et al. 2015

Phys. Chem. Chem. Phys.

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“…DLW has led to micro and nano-photonics demonstrations of mechanical, chemical and optical contrast in the bulk or at the surface, as differential etching solubility, new linear absorption and fluorescence or plasmonic properties, as well as dielectric phase transition [2]. Nonlinear optical contrast can also appear from third-order nonlinear response enhancement due to density contrast, as proposed for perennial high density data storage [3,4]. DLW also showed second-order nonlinear optical properties, even in a glassy environment, either due to the localized crystallization of non-centrosymmetric nanocrystalittes [5] or to the production of a buried static space charge separation at the root of the electric field induced second harmonic generation (EFISHG) [6].…”

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confidence: 99%

Direct laser writing of efficient effective second order nonlinear optical properties in a tailored silver-doped phosphate glass

Papon

Royon

Marquestaut

et al. 2013

MATEC Web of Conferences

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This last decade, femtosecond (fs) direct laser writing (DLW) has proposed an exponentially growing number of achievements thanks to the simultaneous improvements in both fs laser technologies and material sciences, leading to innovative light/matter interactions [1]. DLW has led to micro and nano-photonics demonstrations of mechanical, chemical and optical contrast in the bulk or at the surface, as differential etching solubility, new linear absorption and fluorescence or plasmonic properties, as well as dielectric phase transition [2]. Nonlinear optical contrast can also appear from third-order nonlinear response enhancement due to density contrast, as proposed for perennial high density data storage [3,4]. DLW also showed second-order nonlinear optical properties, even in a glassy environment, either due to the localized crystallization of non-centrosymmetric nanocrystalittes [5] or to the production of a buried static space charge separation at the root of the electric field induced second harmonic generation (EFISHG) [6].Laser-induced optical poling, leading to the EFISHG effect, is a very promising approach. Indeed, it generates very limited index changes, no phase transition and no interface, which prevents any potential high refractive index contrast and the associated drawback of light diffusion as generally the case for nano-crystallisation in bulk glassy matrices [5]. Laser-induced optical poling is thus a powerful approach for three-dimension high density data encoding, with multiple layers in the depth of the photosensitive material, which cannot be performed under thermally-assisted electric poling where the very strong permanent static electric field, leading to a few pm/V effective EFISHG amplitude, is limited to surface structuring with depths typically limited to 10 μm [7].We present here recent EFISHG results obtained thanks to the fs infrared DLW of a tailored silver co-doped phosphate glass. We report of significantly new EFISHG optical response with respect to previous works [6], associated to an original electric field spatial distribution with near-to-diffraction limit. Power and polarization scans confirm the EFISHG nature of the localized SHG signal. Coherent nonlinear microscopy imaging was also performed along the light propagation axis and modelled, so as to characterize the strong EFISHG signal and its spatial topology and orientation. Moreover, we report on the remarkably clear stability of the DLW-induced EFISHG signal with respect to thermal constraint below the glass transition temperature. These observations make the EFISHG behaviour a very attractive process for further perennial DLW for photonics applications.

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“…We assume that there is a combination of two states, modified and non-modified Ag clusters, where the interline-unaffected Ag clusters are dominant in the absorption spectra with the peak at 416 nm and elongated Ag clusters responsible for the SP resonance splitting into two peaks, one around 640 nm for p-polarized excitation and another very weak below 416 nm for s-polarized excitation. Combination of thermal poling with ultrafast laser writing can lead to a fine control of optical and structural properties of metal-doped soda-lime glass and can be applied for fabrication of optical components and optical data storage [4,5]. …”

mentioning

confidence: 99%

Laser assisted modification of poled silver-doped nanocomposite soda-lime glass

Drevinskas

Beresna

Deparis

et al. 2013

MATEC Web of Conferences

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Thermal poling assisted homogenization of polydisperse Ag nanoparticles embedded in the soda-lime glass is demonstrated. The homogenization leads to the narrowing of the localized surface plasmon resonance. The subsequent irradiation with linearly polarized ultrashort laser pulses induces spectrally defined and four times larger dichroism than in non-poled sample.Metal-doped nanocomposite glasses are of interest for their unique linear and nonlinear optical properties. Simple and low cost fabrication technique of nanocomposite glass is based on ion exchange. In this technique the metal ions are embedded in glass matrix by ion exchange with further annealing in a reducing atmosphere, resulting in randomly distributed metal aggregates with an exponentially decreasing filling factor across the depth [1]. The optical properties of nanoparticles can then be controlled by ultrashort laser pulses with a wavelength close to localized surface plasmon resonance [2]. However, a non-uniform distribution of nanoparticles in the glass matrix complicates any laser assisted modification. In this work we demonstrate the poling assisted homogenization of Ag nanoparticles embedded in soda-lime glass matrix, which improves laser assisted modification of optical properties.The polydisperse nanocomposite sample prepared from soda-lime float glass by Ag + -Na + ion exchange method was provided by CODIXX AG. The spherical Ag nanoparticles of 30-40 nm mean diameter were distributed in a thin surface layer of several micrometers thickness with the high filling factor close to the surface. The sample was thermally poled in air inside the oven using pressed-contact electrodes, with the anode facing the Ag-doped area. The laser modification of Ag nanoparticles was performed using a regeneratively amplified, mode-locked Yb:KGW based ultrafast laser system (Pharos, Light Conversion Ltd.). The laser system was operating at 515 nm (frequency doubled) and 200 kHz repetition rate. The laser beam was focused on the top of sample via a ×5 (NA=0.13) objective lens. The modification of poled area was carried out using 1 ps pulse duration, linear polarization, 0.5 mm/s writing speed with 5 µm interline distance, 10000 pulses/mm density and the varying laser pulse intensity from 2.2×10 10 W/cm 2 to 4.4×10 11 W/cm 2 , i.e. below the damage threshold of soda-lime glass. For the modification of pristine area we used 700 fs pulses, linear polarization, 5 mm/s speed with 5 µm interline distance, 40000 pulses/mm density and the intensities from 5.0×10 10 W/cm 2 to 2.3×10 11 W/cm 2 . For the optical characterization, the absorption spectra of pristine and poled areas were taken with UV-VIS-NIR spectrophotometer (Varian, CARY 500) and optical characterization of modified micro-areas was made with UV-VIS-NIR imaging spectrometer (Andor, Shamrock SR-303i) and VIS microspectrometer system (Olympus BX51, CRAIC). The spectral dependence of modified Ag-doped glass for s-and p-polarizations was measured by inserting linear polarizer before the sample. Image...

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Silver Clusters Embedded in Glass as a Perennial High Capacity Optical Recording Medium

Abstract: International audienc

Cited by 217 publications

References 32 publications

Diffusion-driven and size-dependent phase changes of gallium oxide nanocrystals in a glassy host

Diffusion-driven and size-dependent phase changes of gallium oxide nanocrystals in a glassy host

Direct laser writing of efficient effective second order nonlinear optical properties in a tailored silver-doped phosphate glass

Laser assisted modification of poled silver-doped nanocomposite soda-lime glass

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