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Dependence of upconversion emission intensity on Er3 concentration in Ho3 /Er3 co-doped (GeS2)90(Ga2S3)10 chalcogenide glasses

Authors: Himics Dianna | Střižík Lukáš | Holubová Jana | Beneš Ludvík | Frumarová Božena | Oswald J | Wágner Tomáš

Year: 2017

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Dependence of upconversion emission intensity on Er3 concentration in Ho3 /Er3 co-doped (GeS2)90(Ga2S3)10 chalcogenide glasses	Bulk chalcogenide glasses (GeS2)90(Ga2S3)10 doped with Ho3+ and Er3+ ions have been prepared by melt-quenching technique and investigated the compositional dependence of upconversion photoluminescence (UCPL) emission intensity. The spectroscopic characterization of prepared chalcogenide glasses has been carried out through X-ray diffraction, Raman, absorption and luminescence spectra. All of the measured XRD patterns confirmed the amorphous characteristic of the perpared glasses. The glass forming ability, chemical stability and thermal stability increase with erbium addition. Optical absorption and fluorescence spectra in the spectral range 500-3000 nm were studied at room temperature. The observed absorption bands are due to the transitions from the ground state 4 I15/2 to the 4 I13/2, 4 I11/2, 4 I9/2, 4F9/2, 4S3/2 and 2H11/2 excited states of Er3+ ion. Luminescence properties of bulk glasses were investigated by varying the excitation wavelength. For all the codoped glasses, the three upconversion emission bands centered at 530, 550 and 661 nm were obtained at pumping wavelengths of 980 nm, which correspond to 2H11/2→4 I15/2, 4S3/2→4 I15/2 and 4F9/2→4 I15/2 transitions, respectively (Fig.1). The green and red photon up-conversion emission becomes stronger by increasing with erbium addition. The efficiency of 4f-4f transition in glasses is steadily increasing with increasing Er3+ ions content.	Upconversion; Er3+; chalcogenide glasses