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Optical spectroscopy of Nd ions in a nanostructured glass matrix |
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| Authors: | EO Serqueira V Anjos MJV Bell |
| Institution: | a Laboratório de Novos Materiais Isolantes e Semicondutores (LNMIS), Instituto de Física, Universidade Federal de Uberlândia, 38400-902 Uberlândia-MG, Brazil b Grupo de Espectroscopia de Materiais, Departamento de Física, Universidade Federal de Juiz de Fora, 36036-330 Juiz de Fora-MG, Brazil c Instituto de Física de São Carlos, USP, São Carlos, SP 13560-250, Brazil d Centro Universitário Central Paulista, UNICEP, São Carlos, SP 13563-470, Brazil |
| Abstract: | This paper presents the optical characterization of Nd3+ ions in nanostructured SiO2-Na2CO3-Al2O3-B2O3 (SNAB) CdS glass, synthesized by fusion. Radiative properties of the glass were determined by absorption, luminescence spectroscopy and lifetime measurements. Nd3+ emission enhancement and quenching were investigated in the presence of CdS nanocrystals. Nd3+-emission quenching was attributed to upconversion mechanisms and nonradiative processes such as multiphonon decay and energy transfer, while the Nd3+-emission enhancement was due to energy transfer from the CdS nanocrystals. Changes in the chemical environment around CdS nanocrystals were also confirmed by Judd-Ofelt calculations. |
| Keywords: | Nd3+ CdS Glasses Luminescence Judd-Ofelt |
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