Upconversion luminescence of Er3+-doped YSZ single crystals

被引：0

作者：

Savoini, B. ^{[1
]}

Muoz-Santiuste, J.E. ^{[1
]}

González, R. ^{[1
]}

Cruz, G.K. ^{[2
]}

Bonardi, C. ^{[3
]}

Carvalho, R.A. ^{[3
]}

机构：

[1] Departamento de Física, Escuela Politecnica Superior, Universidad Carlos III, Avda. de la Universidad 30, 28911 Leganes, Madrid, Spain

[2] Departamento de Fisica, UEPG, CP 993, Ponta Grossa, PR, Brazil

[3] Instituto de Física de São Carlos, USP, CP 369, São Carlos, SP, Brazil

来源：

| 1600年 / Elsevier Ltd卷 / 323-324期

关键词：

Continuum mechanics - Erbium - Infrared radiation - Light emission - Photoluminescence - Photosensitivity - Yttrium compounds;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The upconversion luminescence of erbium-doped yttria stabilized zirconia single crystals was studied upon excitation in the near-infrared region inside the 4I9/2 level. Direct excitation in the visible region was also carried out. A strong green luminescence from the 4S3/2 level, and a less intense red emission from the 4F9/2 level, were observed for both visible and upconversion excitations. Absorption measurements and direct site-selective emission measurements revealed the presence of different types of optical Er3+ centers. Pulsed and continuous IR excitation experiments show that different optical centers undergo upconversion processes. Cw infrared excitation, compared with both pulsed infrared excitation and direct visible excitation, seems to be a more sensitive site-selective technique. High power continuous excitation 'saturates' the upconverted emission, while high power pulsed excitation increases the rate of the upconversion luminescence. It is concluded that the upconversion mechanisms are not the same for high power pulsed and continuous excitation. © 2001 Elsevier Science B.V.

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