Glass ceramics for frequency conversion

The effect of rare earth (RE3+) ionic radii on transparent lanthanide-tellurite glass-ceramics: correlation between ‘hole-formalism’ and crystallization

“…Transparent GCs are the most promising low-cost alternative to single crystals to achieve a range of advanced photonic applications like high power lasers, 1,2 light-emitting diodes (LEDs), 3,4 up-conversion and down-conversion materials, 5 amplifiers, 6 telescope mirrors, 7 solar concentrators, 8 and optical security. 9,10 Certainly, transparent GCs obtained from simple but controlled heat-treatment of glass offer better optical transparency compared to commercially available transparent ceramics (Nd:YAG, Yb:Sc 2 O 3 /Y 2 O 3 /Lu 2 O 3 ) due to the possibility of tuneable micro structuring, low birefringent light scattering at grain boundaries and the absence of any porosity.…”

Upconversion Luminescence of Silica–Calcia Nanoparticles Co-doped with Tm3+ and Yb3+ Ions

“…The couple Tm 3+ /Yb 3+ ions have been largely investigated because of the need to efficiently pump the Tm 3+ ion to obtain upconversion-based photonic devices on a broad spectrum of wavelengths. There are reports on Tm 3+ /Yb 3+ upconversion luminescence in single crystals [9], nanocrystals [17], glasses [20], ceramics [21], and glass-ceramics [19]. Interesting research was performed on Tm 3+ /Yb 3+ upconversion luminescence in silicate glasses [22,23] to enhance the optical amplification spectroscopic The analytical reagents comprising tetraethyl orthosilicate (TEOS, Sigma-Aldrich, Darmstadt, Germany), HNO 3 , NH 4 OH, Ca(NO 3 ) 2 •4H 2 O (Avantor Performance Materials, Gliwice, Poland), and high purity Yb 2 O 3 and Tm 2 O 3 (≥99.99%, Stanford Materials Co., Lake Forest, CA, USA) were used as starting materials to obtain seven samples of different compositions varied through the incorporation of rare earth elements: (xTm 3+ /yYb 3+ ):63SiO 2 -37CaO, where x = 0.15, 0.3 or 0.5 and y = 0, 1, 2, 3 or 4 (mol%).…”

“…Yb 3+ ions are excellent luminescence sensitizers for other rare earth ions due to their effective absorption cross section at 980 nm [ 16 ]. The Yb 3+ ion has been demonstrated to be a crucial element for upconverters [ 16 ], high power lasers [ 18 ], photovoltaic systems [ 19 ], and integrated optics [ 5 ]. The couple Tm 3+ /Yb 3+ ions have been largely investigated because of the need to efficiently pump the Tm 3+ ion to obtain upconversion-based photonic devices on a broad spectrum of wavelengths.…”

“…The couple Tm 3+ /Yb 3+ ions have been largely investigated because of the need to efficiently pump the Tm 3+ ion to obtain upconversion-based photonic devices on a broad spectrum of wavelengths. There are reports on Tm 3+ /Yb 3+ upconversion luminescence in single crystals [ 9 ], nanocrystals [ 17 ], glasses [ 20 ], ceramics [ 21 ], and glass-ceramics [ 19 ]. Interesting research was performed on Tm 3+ /Yb 3+ upconversion luminescence in silicate glasses [ 22 , 23 ] to enhance the optical amplification spectroscopic properties of thulium in silica.…”

Ag-Sensitized NIR-Emitting Yb3+-Doped Glass-Ceramics

“…Rare earth ions (RE 3+ ) have many optical applications due to their unique spectral properties, in relation to the features of their electronic energy levels, covering UV, visible and IR [1]. This makes them excellent candidates for lighting [2][3][4], displays [5], biosensing [6][7][8], optical amplification [9], anticounterfeiting [10,11] and solar cells [12][13][14]. Among them, Yb 3+ ions provide near infrared (NIR) emission around 950-1100 nm, which is interesting for many of the previously cited applications.…”