Publikace detail

Spectroscopic properties and effect of Er3 concentration on the upconversion and 1.5 μm photoluminescence in Ge25Ga8As2S65: Er3 chalcogenide glass

Rok: 2017

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

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Jazyk	Název	Abstrakt	Klíčová slova
eng	Spectroscopic properties and effect of Er3 concentration on the upconversion and 1.5 μm photoluminescence in Ge25Ga8As2S65: Er3 chalcogenide glass	We synthesized thermally stable Ge25Ga8As2S65: xEr3+ chalcogenide glasses, where x = 0.01–1 at% and studied their optical properties and structure. The structure was investigated by the Raman scattering spectroscopy. The intensities of the Er3+ intra-4f transitions were calculated by the Judd-Ofelt theory. The photon upconversion and Er3+: 4I13/2 → 4I15/2 (~1.5 μm) photoluminescence emissions in Ge25Ga8As2S65 were investigated as a function of the Er3+ concentration. Upconversion photoluminescence emission was achieved at ~530, ~550, ~660, ~810 and ~990 nm using the pumping wavelengths of 980 and 1550 nm, respectively. The red-to-green upconversion photoluminescence emission intensity ratio (I660/I530+550) as well as total photon upconversion intensity increases with increasing Er3+ concentration. It was attributed to the energy transfer upconversion and cross relaxation processes contributing to the ground state absorption /excited state absorption upconversion photoluminescence mechanism. The radiation trapping was manifested at higher concentrations of Er3+ ions by the broadening of the Er3+: 4I13/2 → 4I15/2 (~1.5 μm) emission band and by its lifetime prolongation [4].	Er; upconversion; photoluminescence;chalcogenide glass

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