This presentation explores the interdisciplinary realm of nanocomposite material design, integrating materials engineering, chemistry, and photonics. Focusing on the innovative use of nanocomposite glasses containing noble metal nanoparticles, the discussion delves into the novel opportunities these materials present for developing sensing structures based on LSPR (Localized Surface Plasmon Resonance). Additionally, transparent glass-ceramics are spotlighted as high-performing materials in functional photonic applications for optical fiber technology.
Heavy metal oxide glasses based on the Bi2O3-GeO2-Ga2O3-Na2O system doped with Er3+ ions have been presented.. The
influence of glass composition on thermal stability and luminescent properties has been presented. Fabricated glass
exhibits emission at 1538 nm (Er3+: 4I13/2 → 4I15/2) under 980 nm laser diode excitation. Due to different molar content of
oxides in samples, various luminescence intensity was observed. High absorption cross-section allowed to determine the
gain coefficient at the level of 3.47 cm-1 at the wavelength of 1538 nm. According to the results, fabricated bismuthgermanate
glasses should be used for construction of optical waveguides operating in the range of near-infrared.
In the article a system for measuring the concentration of chlorophyll in methanol solution have been developed.
Microstructural waveguide co- doped with Yb3+/Tm3+ ions was used as a sensing element. The waveguide consisted of
thirty-seven glass capillaries arranged hexagonally was fabricated using the stacking and drawing method. Due to the
excitation of the active core by laser diode (λ=980nm), an effective energy transfer between Yb3+ and Tm3+ ions occurs.
As a result, two luminescence bands at 480 nm (1G4→3H6) and 650 nm (1G4→3F4) were obtained. Concentration of
chlorophyll methanol solution in the range from 2.75 to 13.66 [mh/dms] was measured. Linear dependence of the decrease of
luminescence intensity of thulium ions on its concentration was obtained. The sensitivity of the developed system was
0.005 [1/(mg/dm3)].
In the article a microstructural active optical fiber for sensing application was presented. Construction consists of three hexagonal rings and a core made of SiO2 - Al2O3 - Sb2O3 glass co-doped with 1Yb2O3/0.1Tm2O3 [mol%]. Developed optical fiber is characterized by upconversion luminescence (λp=980nm) at 480nm (Tm3+: 1G4→3H6) and 650 nm (Tm3+ : 1G4→3F4). Population of thulium levels was attained in result of the Yb 3+→Tm3+ upconversion energy transfer. Sensing application of elaborated active photonic structure was presented on the example of aqueous fluorescein solution. Fabricated microstructural optical fiber enables to measure of the fluorescein solutions with the concentration of (0.25 - 5.42)·10-4 [mol%]. Sensitivity of the elaborated measurement setup is 1.51·104 [1/mol%].
In the article analysis of UV absorption and visible fluorescence of Sm3+ and Tb3+ ions doped phosphate glass with molar composition: 65P2O5 + 8Al2O3 + 10BaO + 17(Na2O + MgO + ZnO) have been investigated. As a result of optical pumping fabricated glass with radiation from a deuterium lamp four luminescence bands were observed near to the wavelength of 600 nm for Sm3+ ions and 550 nm for Tb3+ ions. It was found that larger energy gap between laser and ground levels leads to the strongest emission in the visible range in terbium doped glasses than in glasses doped with samarium ions. Both fabricated glasses are characterized by the ability to selectively detect the radiation in the UV range.
In the article effect of temperature on luminescent properties of antimony - silicate glass co - doped with 1.0mol%Yb3+/1mol%0.2Tm3+ under 976 nm was investigated. As a result of optical excitation with radiation with the wavelength of 976 nm three luminescence bands were obtained: 477 nm for 1G4→3H6 quantum transition, 650 nm for 1G4→3F4 and 698 nm for 3F2,3→3H6 in thulium ions, formed by the efficient Yb3+ → Tm3+ energy transfer. It has been found that the increase in temperature of a glass leads to higher probability of phonon transitions from the 1G4 to the 3F2,3 level leading to quenching of luminescence band with the wavelength within the band of 650 nm. The maximum sensitivity to temperature change is 0.02139 [K-1] at 250°C. The nature of a change over a range of studied temperature from 5 to 250°C is linear. The results of the research indicate that the fabricated glass can be used to construct luminescence temperature sensors.
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