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Title: Photoluminescence, electro-optic response and piezoelectric properties in pressureless-sintered Er-doped KNN-based transparent ceramics
Authors: Wu, X
Lu, S
Kwok, KW 
Keywords: Electro-optic effect
Mid-infrared emission
Transparent ceramics
Issue Date: 2017
Publisher: Elsevier
Source: Journal of alloys and compounds, 2017, v. 695, p. 3573-3578 How to cite?
Journal: Journal of alloys and compounds 
Abstract: Er-doped (K0.5Na0.5)1−xLixNb1−xBixO3 (0.05 ≤ x ≤ 0.08) ceramics have been prepared by pressureless sintering. Because of the cubic-like phase as well as the dense and fine-grained structure, the ceramics are optically clear, exhibiting high transmittances in the near-infrared and mid-infrared (MIR) regions (∼50% and ∼75%, respectively). They also possess strong electro-optic (EO) response, giving a large effective linear EO coefficient (128–184 pm/V). Owing to Er3+, the ceramics exhibit green and red up-conversion photoluminescence (PL) emissions, which are sensitive to the crystal symmetry of the ceramic host. The ceramics also exhibit a low absorption coefficient of OH− groups and then distinct and broadband MIR emissions. Together with the relatively large piezoelectric coefficient (70–90 pC/N), high dielectric constant (∼1400) and low dielectric loss (∼0.03), the ceramics open up potential applications in electrical/optical interdisciplinary field, such as visible displays, MIR solid lasers and optical attenuators.
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2016.11.409
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