Tm3+-activated transparent oxy-fluoride glass–ceramics: structural and spectroscopic properties

Mattarelli, Maurizio; Tikhomirov, V. K.; Seddon, Angela B.; Montagna, M.; Moser, E.; Chiasera, Alessandro; Chaussedent, Stéphane; Conti, G. Nunzi; Pelli, S.; Righini, Giancarlo C.; Zampedri, L.; Ferrari, M.

doi:10.1016/j.jnoncrysol.2004.08.043

Cited by 45 publications

(33 citation statements)

References 17 publications

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“…Several researchers used Raman spectroscopy to study oxyfluoride glass ceramics (e.g., [167,274,[356][357][358][359][360][361]). Tikhomirov et al [359,360] assigned two lines, observed in Raman spectra at relatively low vibrational frequencies, to spheroidal and torsional vibrations of PbF 2 spheric nanoparticles in the glass matrix and calculated diameters of the latter to be ca.…”

Section: Plane Inmentioning

confidence: 99%

Transparent oxyfluoride glass ceramics

Федоров

Luginina

Попов

2015

Journal of Fluorine Chemistry

286

123

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Section: Plane Inmentioning

confidence: 99%

Transparent oxyfluoride glass ceramics

Федоров

Luginina

Попов

2015

Journal of Fluorine Chemistry

286

123

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“…Crystal sizes between 9 and 18 nm and a volume fraction of 20-30% were estimated from XRD and TEM. Evidence of the presence of Pr 3z ions in crystals is provided by the following: (1) after excitation at 1?02 mm, glassy samples did not present fluorescence; (2) 161 in which it was possible to quantify that 57% of Tm 3z is located in a crystalline matrix. The quantity of RE ions located in crystals can also be estimated from emission spectra, as reported by Boulard et al 162 in fluoride glass ceramics.…”

Section: Wang and Ohwaki's Compositionmentioning

confidence: 99%

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Pablos-Martín

Durán

Pascual

2012

International Materials Reviews

153

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Rare earth (RE) doped oxyfluoride glass ceramics possess interesting optical properties with applications in telecommunications and optoelectronics, such as solid state lasers, optical amplifiers, etc. These materials combine the transparency and mechanical and chemical resistance of aluminosilicate glasses with the low phonon energy and facile incorporation of RE ions in the fluoride crystals. The incorporation of RE ions in the crystalline phases enhances the laser emission intensity, a major property of these materials. Transparency is achieved when crystal size is in the nanometric scale, usually below 40 nm, which avoids light scattering. A strict control of the nucleation and crystal growth processes is therefore necessary which requires a deep knowledge of the crystallisation mechanisms. The great activity and publications in this field in the last decades merit a review providing a comparative study of the different nanoglass ceramic systems, their structural and optical characterisation and their main properties and applications. This is the objective of this review paper which includes 232 references. A general discussion on glass nucleation and crystallisation theories and more relevant crystallisation parameters and characterisation techniques are put forward in the first section of the review, focused on nanocrystallisation processes in oxyfluoride systems. In the second section, the principal RE doped glass ceramics are presented. After a general introduction about the luminescence processes, including up-and down-conversion, the behaviour of RE elements in glasses and crystals are discussed. Glass ceramic compositions have been divided as follows: glass ceramics with a glass composition following Wang and Ohwaki's oxyfluoride glass ceramic, 1 ; and glass ceramics with different matrix compositions, arranged by crystalline phases. Relevant properties, mainly optical and laser, are described in each system along with the most relevant applications of these materials.

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“…where the J-O parameters Ω t can be derived from the absorption spectra dates based on the Judd-Ofelt theories [15][16][17][18], h is the Planck constant, n is the refractive index of samples assumed to be the same at different wavelengths, J and J' are the total angular momentum quantum number of the initial and final states. aJ||L + 2S||bJ is the reduced matrix element for the operator L + 2S and can be calculated from the formula proposed by Weber [19].…”

Section: Influence Of Er 3+ Concentration On 153 μM Emissionmentioning

confidence: 99%