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Active glass nanoparticles by ultrafast laser pulses

Active glass nanoparticles by ultrafast laser pulses

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The authors have successfully demonstrated a method employing pulsed-laser ablation of active glass to produce nanoparticles exhibiting upconversion, pumped by near-infrared wavelengths and emitting visible light. A high repetition rate ultrashort pulsed laser was used to ablate glass under atmospheric conditions. Ejected particles collected were analysed by electron microscopy to determine particle size and characterise the morphology. The measured mean particle diameter was ∼17 nm. A bright upconversion green emission was observed from the nanoparticles almost in a similar fashion as from the bulk specimen. The upconversion photoluminescence characteristics have been investigated to explore potential applications for efficient bioimaging and light-emitting devices.

Inspec keywords: bismuth compounds; erbium; laser ablation; high-speed optical techniques; photoluminescence; light emitting devices; electron microscopy; nanoparticles; glass; biomedical optical imaging

Other keywords: ultrafast laser pulses; particle size; bioimaging; upconversion photoluminescence; near-infrared wavelengths; electron microscopy; light-emitting devices; upconversion green emission; active glass nanoparticles; Bi2O3-Jk:Er

Subjects: Structure of glasses; Methods of nanofabrication and processing; Ultrafast optical measurements in condensed matter; Ultraviolet, visible and infrared radiation effects; Optical properties of amorphous and glassy semiconductors and insulators (thin films, low-dimensional and nanoscale structures); Photoluminescence in other inorganic materials

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