Blue emission from Eu2+-doped high silica glass by near-infrared femtosecond laser irradiation

Abstract

Eu2+ -doped high silica glass ͑HSG͒ is fabricated by sintering porous glass which is impregnated with europium ions. Eu 2+ -doped HSG is revealed to yield intense blue emission excited by ultraviolet ͑UV͒ light and near-infrared femtosecond laser. The emission profile obtained by UV excitation can be well traced by near-infrared femtosecond laser. The upconversion emission excited by 800 nm femtosecond laser is considered to be related to a two-photon absorption process from the relationship between the integrated intensity and the pump power. A tentative scheme of upconverted blue emission from Eu 2+ -doped HSG was also proposed. The HSG materials presented herein are expected to find applications in high density optical storage and three-dimensional color displays.

Synthesis and upconversion luminescent properties of water-soluble CdTe quantum dots

“…When we focus the femtosecond laser beam (800 nm) to the solution, bright visible emission is observed. So The upconversion intensity and pump power usually have the following relationship [15,[17][18][19][20]:…”

Intense red and cyan luminescence in europium doped silicate glasses

“…It should be noted that there are two peaks locate at 349 and 396 nm in the excitation spectrum. The peak at 349 nm had been reported by many researchers and had been attributed to the f-d transition and the other one peaking at 396 nm to the energy level splitting of 4f 6 5d 1 of Eu 2+ ions [17][18][19]. In order to compare with GEu, the 394 nm was set as the excitation source and intense cyan-light was observed by the naked eyes, as shown in Fig.…”

Luminescent Properties and Energy Transfer Mechanism of Gd3+ and Eu2+ Co-doped Phosphate Glasses

“…4f 7 transitions of Eu 2? [8]. Emission peaks for other specimens are located at 312, 355 and 445 nm, which are mainly attributable to the 6 P ?…”

“…-doped silicate glasses have been reported widely. Qiao et al [8] studied the blue emission from Eu 2? -doped high silica glass by near-infrared femtosecond laser irradiation.…”