Luminescence properties of silver zinc phosphate glasses following different irradiations
TL;DR: In this article, the authors report on exposing a photosensitive zinc phosphate glass containing silver to different radiation (electron, gamma, optical) using nanosecond ultraviolet (UV) and femtosecond infrared (IR) laser.
About: This article is published in Journal of Luminescence.The article was published on 2009-12-01. It has received 69 citations till now. The article focuses on the topics: Ultraviolet & Irradiation.
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TL;DR: This critical review of studies on silver nanodots in inert environments and in aqueous solutions is revisited with an effort to decipher the relations between their chemical/photophysical properties and their structures.
Abstract: Though creation and characterization of water soluble luminescent silver nanodots were achieved only in the past decade, a large variety of emitters in diverse scaffolds have been reported. Photophysical properties approach those of semiconductor quantum dots, but relatively small sizes are retained. Because of these properties, silver nanodots are finding ever-expanding roles as probes and biolabels. In this critical review we revisit the studies on silver nanodots in inert environments and in aqueous solutions. The recent advances detailing their chemical and physical properties of silver nanodots are highlighted with an effort to decipher the relations between their chemical/photophysical properties and their structures. The primary results about their biological applications are discussed here as well, especially relating to their chemical and photophysical behaviours in biological environments (216 references).
515 citations
TL;DR: In this paper, the authors present a critical overview of the current state of the art in studying femtosecond laser induced various phenomena in transparent materials, including their physical and chemical mechanisms, the applications and limitations as well as the future research trends.
214 citations
TL;DR: [∗] Dr. Canioni Centre de Physique Moleculaire Optique et Hertzienne University of Bordeaux 351 Cours de the Liberation, 33405 Talence (France) E-mail: l.canioni@cpmoh.u-bordeaux1.fr
Abstract: [∗] Dr. A. Royon , Dr. M. Bellec , G. Papon , Dr. B. Bousquet , Prof. L. Canioni Centre de Physique Moleculaire Optique et Hertzienne University of Bordeaux 351 Cours de la Liberation, 33405 Talence (France) E-mail: l.canioni@cpmoh.u-bordeaux1.fr K. Bourhis , Dr. T. Cardinal Institut de Chimie de la Matiere Condensee de Bordeaux University of Bordeaux 87 Avenue du Docteur Schweitzer, 33608 Pessac (France) Dr. Y. Deshayes Laboratoire de l ′ Integration du Materiau au Systeme University of Bordeaux 351 Cours de la Liberation, 33405 Talence (France)
198 citations
TL;DR: In this article, three-dimensional fluorescent nanostructures are photoinduced by a near-infrared high repetition rate femtosecond laser in a silver-containing femto-photoluminescent glass.
Abstract: Three-dimensional fluorescent nanostructures are photoinduced by a near-infrared high repetition rate femtosecond laser in a silver-containing femto-photoluminescent glass. By adjusting the laser dose (fluence, number of pulses, and repetition rate), these stabilized intense fluorescent structures, composed of silver clusters, can be achieved with a perfect control of the luminescence intensity, the emission spectrum, and the spatial distribution at the nanometer scale. This novel approach opens the way to the fabrication of stable fluorescent nanostructures in three dimensions in glass for applications in photonics and optical data storage.
76 citations
References
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TL;DR: The results suggest that multiphoton interactions occur in the glasses and that it may be possible to write three-dimensional optical circuits in bulk glasses with such a focused laser beam technique.
Abstract: With the goal of being able to create optical devices for the telecommunications industry, we investigated the effects of 810-nm, femtosecond laser radiation on various glasses. By focusing the laser beam through a microscope objective, we successfully wrote transparent, but visible, round-elliptical damage lines inside high-silica, borate, soda lime silicate, and fluorozirconate (ZBLAN) bulk glasses. Microellipsometer measurements of the damaged region in the pure and Ge-doped silica glasses showed a 0.01–0.035 refractive-index increase, depending on the radiation dose. The formation of several defects, including Si E′ or Ge E′ centers, nonbridging oxygen hole centers, and peroxy radicals, was also detected. These results suggest that multiphoton interactions occur in the glasses and that it may be possible to write three-dimensional optical circuits in bulk glasses with such a focused laser beam technique.
2,500 citations
TL;DR: In this paper, the effects of surface modification on colloidal metal particles in aqueous solution were investigated. And the resulting changes in the chemical, photochemical, and optical properties were discussed.
Abstract: The study of nanometer and subnanometer colloidal metal particles in aqueous solution complements the investigation of small particles in molecular beams, frozen solutions, and inorganic clusters. The electronic properties of the metal particles are changed by surface modification, for example by chemisorption of a nucleophilic molecule or by deposition of a second metal. The resulting changes in the chemical, photochemical, and optical properties are discussed. Methods are described which enable one to store excess electrons or positive holes on the particles in a controlled manner and to investigate the accompanying changes in the optical properties. Metal particles carrying excess electrons initiate electrochemical reactions such as the reduction of water or the deposition of metals
1,633 citations
TL;DR: In this article, permanent optical waveguides can be formed in various bulk glasses by photoinduced refractive index change with an ultrashort pulse laser, which can be fabricated by focusing the laser beam through an microscope objective and translating the sample parallel to the axis of the beam.
Abstract: We show that permanent optical waveguides can be formed in various bulk glasses by photoinduced refractive index change with an ultrashort pulse laser. The waveguides were fabricated by focusing the laser beam through an microscope objective and translating the sample parallel to the axis of the laser beam. From the observations of intensity distributions in the output of guided light by a CCD camera, we demonstrated that permanent optical waveguides can be successfully formed in various glasses. In addition, from the analysis of a near-field pattern, it was confirmed that single mode waveguides of the graded index type can be formed by a writing technique using the ultrashort pulse laser.
771 citations
TL;DR: Bragg diffractive gratings recorded in the volume of photosensitive silicate glasses doped with silver, cerium, fluorine, and bromine recorded with photothermorefractive process observedabsolute diffraction efficiency of as much as 93% was observed for 1-mm-thick gratings with spatial frequencies up to 2500 mm(-1).
Abstract: Photosensitive silicate glasses doped with silver, cerium,
fluorine, and bromine were fabricated at the Center for Research and
Education in Optics and Lasers. Bragg diffractive gratings were
recorded in the volume of these glasses with a photothermorefractive
process (exposure to UV radiation of a He–Cd laser at 325 nm is
followed by thermal development at 520 °C). Absolute
diffraction efficiency of as much as 93% was observed for 1-mm-thick
gratings with spatial frequencies up to 2500 mm-1. No
decreasing of diffraction efficiency was detected at low spatial
frequencies. Original glasses were transparent (absorption
coefficient less than 1 cm-1) from 350 to 4100
nm. Induced losses in exposed and developed glass decreased from
0.3 to 0.03 cm-1 between 400 and 700 nm, respectively, and
did not exceed 0.01–0.02 cm-1 in the IR region from 700
to 2500 nm. Additional losses caused by parasitic structures
recorded in the photosensitive medium were studied.
288 citations
TL;DR: In metal nanoparticles the resonance wavelength of light-driven collective electron oscillations is determined by the particle shape, so the storage density can be increased by at least a factor of 5 compared with that for conventional optical storage principles.
Abstract: In metal nanoparticles the resonance wavelength of light-driven collective electron oscillations is determined by the particle shape. This shape dependence can be used for optical data storage by spectral coding. In this way the storage density can be increased by at least a factor of 5 compared with that for conventional optical storage principles.
260 citations